Subjects -> PHYSICS (Total: 857 journals)
    - ELECTRICITY AND MAGNETISM (10 journals)
    - MECHANICS (22 journals)
    - NUCLEAR PHYSICS (53 journals)
    - OPTICS (92 journals)
    - PHYSICS (625 journals)
    - SOUND (25 journals)
    - THERMODYNAMICS (30 journals)

PHYSICS (625 journals)            First | 1 2 3 4 | Last

Showing 201 - 400 of 741 Journals sorted alphabetically
International Journal of Astronomy and Astrophysics     Open Access   (Followers: 37)
International Journal of Biological, Physical and Chemical Studies     Open Access  
International Journal of Computational Materials Science and Surface Engineering     Hybrid Journal   (Followers: 7)
International Journal of Damage Mechanics     Hybrid Journal   (Followers: 5)
International Journal of Engineering and Applied Physics     Open Access  
International Journal of Fatigue     Hybrid Journal   (Followers: 41)
International Journal of Fracture     Hybrid Journal   (Followers: 14)
International Journal of Geometric Methods in Modern Physics     Hybrid Journal   (Followers: 2)
International Journal of Geophysics     Open Access   (Followers: 5)
International Journal of Heat and Fluid Flow     Hybrid Journal   (Followers: 43)
International Journal of Low Radiation     Hybrid Journal  
International Journal of Low-Carbon Technologies     Open Access   (Followers: 1)
International Journal of Mass Spectrometry     Hybrid Journal   (Followers: 16)
International Journal of Material Forming     Hybrid Journal   (Followers: 1)
International Journal of Materials and Product Technology     Hybrid Journal   (Followers: 2)
International Journal of Mechanical Sciences     Hybrid Journal   (Followers: 15)
International Journal of Mechanics and Materials in Design     Hybrid Journal   (Followers: 7)
International Journal of Medical Physics, Clinical Engineering and Radiation Oncology     Open Access   (Followers: 11)
International Journal of Microstructure and Materials Properties     Hybrid Journal   (Followers: 7)
International Journal of Microwave Science and Technology     Open Access   (Followers: 12)
International Journal of Modeling, Simulation, and Scientific Computing     Hybrid Journal   (Followers: 3)
International Journal of Modern Physics A     Hybrid Journal   (Followers: 15)
International Journal of Modern Physics B     Hybrid Journal   (Followers: 12)
International Journal of Modern Physics C     Hybrid Journal   (Followers: 14)
International Journal of Modern Physics D     Hybrid Journal   (Followers: 13)
International Journal of Modern Physics E     Hybrid Journal   (Followers: 13)
International Journal of Multiphysics     Open Access  
International Journal of Nanomanufacturing     Hybrid Journal  
International Journal of Nanoscience     Hybrid Journal  
International Journal of Nanotechnology     Hybrid Journal   (Followers: 9)
International Journal of Non-Linear Mechanics     Hybrid Journal   (Followers: 8)
International Journal of Nonlinear Dynamics and Control     Hybrid Journal   (Followers: 6)
International Journal of Physics     Open Access   (Followers: 10)
International Journal of PIXE     Hybrid Journal  
International Journal of Plasticity     Hybrid Journal   (Followers: 7)
International Journal of Quantum Information     Hybrid Journal   (Followers: 6)
International Journal of Self-Propagating High-Temperature Synthesis     Hybrid Journal  
International Journal of Solids and Structures     Hybrid Journal   (Followers: 14)
International Journal of Surface Science and Engineering     Hybrid Journal   (Followers: 6)
International Journal of Theoretical and Applied Multiscale Mechanics     Hybrid Journal   (Followers: 3)
International Journal of Theoretical and Mathematical Physics     Open Access   (Followers: 13)
International Journal of Theoretical Physics     Hybrid Journal   (Followers: 17)
International Journal of Thermal Sciences     Hybrid Journal   (Followers: 19)
International Journal on Smart Sensing and Intelligent Systems     Open Access  
International Letters of Chemistry, Physics and Astronomy     Open Access   (Followers: 9)
International Materials Reviews     Hybrid Journal   (Followers: 15)
Iranian Journal of Medical Physics     Open Access  
Iranian Journal of Science and Technology, Transactions A : Science     Hybrid Journal  
Ironmaking & Steelmaking     Hybrid Journal   (Followers: 4)
Izvestiya, Atmospheric and Oceanic Physics     Full-text available via subscription   (Followers: 1)
Izvestiya, Physics of the Solid Earth     Hybrid Journal   (Followers: 2)
Jambura Physics Journal     Open Access  
JETP Letters     Hybrid Journal   (Followers: 3)
Journal of Adhesion Science and Technology     Hybrid Journal   (Followers: 10)
Journal of Advanced Physics     Full-text available via subscription   (Followers: 13)
Journal of Advances in Physics     Open Access   (Followers: 13)
Journal of Applied Mathematics and Physics     Open Access   (Followers: 9)
Journal of Applied Mechanics and Technical Physics     Hybrid Journal   (Followers: 7)
Journal of Applied Physics     Hybrid Journal   (Followers: 69)
Journal of Applied Spectroscopy     Hybrid Journal   (Followers: 9)
Journal of Astrophysics     Open Access   (Followers: 34)
Journal of Astrophysics and Astronomy     Open Access   (Followers: 59)
Journal of Building Physics     Hybrid Journal   (Followers: 1)
Journal of Chromatographic Science     Hybrid Journal   (Followers: 15)
Journal of Complex Networks     Hybrid Journal   (Followers: 1)
Journal of Composite Materials     Hybrid Journal   (Followers: 250)
Journal of Computational and Theoretical Transport     Hybrid Journal   (Followers: 2)
Journal of Computational Methods in Physics     Open Access   (Followers: 8)
Journal of Computational Physics     Hybrid Journal   (Followers: 60)
Journal of Computational Physics : X     Open Access   (Followers: 1)
Journal of Contemporary Physics (Armenian Academy of Sciences)     Hybrid Journal   (Followers: 9)
Journal of Dynamic Systems, Measurement, and Control     Full-text available via subscription   (Followers: 14)
Journal of Elasticity     Hybrid Journal   (Followers: 7)
Journal of Electron Spectroscopy and Related Phenomena     Hybrid Journal   (Followers: 3)
Journal of Electronic Materials     Hybrid Journal   (Followers: 3)
Journal of Electronics Cooling and Thermal Control     Open Access   (Followers: 9)
Journal of Engineering Materials and Technology     Full-text available via subscription   (Followers: 17)
Journal of Engineering Physics and Thermophysics     Hybrid Journal   (Followers: 2)
Journal of Experimental and Theoretical Physics     Hybrid Journal   (Followers: 4)
Journal of Experimental Physics     Open Access   (Followers: 3)
Journal of Fire Sciences     Hybrid Journal   (Followers: 6)
Journal of Geometry and Physics     Full-text available via subscription   (Followers: 2)
Journal of Geophysical Research : Space Physics     Full-text available via subscription   (Followers: 144)
Journal of Gravity     Open Access   (Followers: 4)
Journal of High Energy Astrophysics     Full-text available via subscription   (Followers: 26)
Journal of High Energy Physics     Hybrid Journal   (Followers: 17)
Journal of High Energy Physics, Gravitation and Cosmology     Open Access   (Followers: 2)
Journal of Hydrogels     Full-text available via subscription  
Journal of Hyperspectral Remote Sensing     Open Access   (Followers: 23)
Journal of Imaging     Open Access   (Followers: 3)
Journal of Information Display     Open Access   (Followers: 1)
Journal of Intelligent Material Systems and Structures     Hybrid Journal   (Followers: 8)
Journal of Lightwave Technology     Hybrid Journal   (Followers: 14)
Journal of Low Frequency Noise, Vibration and Active Control     Open Access   (Followers: 8)
Journal of Luminescence     Hybrid Journal   (Followers: 2)
Journal of Materials Engineering and Performance     Hybrid Journal   (Followers: 22)
Journal of Materials Physics and Chemistry     Open Access   (Followers: 7)
Journal of Materials Science     Hybrid Journal   (Followers: 26)
Journal of Materials Science : Materials in Electronics     Hybrid Journal   (Followers: 2)
Journal of Materials Science : Materials in Medicine     Hybrid Journal   (Followers: 1)
Journal of Mathematical Fluid Mechanics     Hybrid Journal   (Followers: 10)
Journal of Mathematical Physics     Hybrid Journal   (Followers: 25)
Journal of Medical Imaging and Health Informatics     Full-text available via subscription  
Journal of Medical Ultrasonics     Hybrid Journal   (Followers: 2)
Journal of Micro/Nanolithography MEMS and MOEMS     Hybrid Journal   (Followers: 24)
Journal of Molecular Spectroscopy     Hybrid Journal   (Followers: 6)
Journal of Motor Behavior     Hybrid Journal   (Followers: 8)
Journal of Multiscale Modeling     Hybrid Journal   (Followers: 1)
Journal of Nepal Physical Society     Open Access  
Journal of Nondestructive Evaluation     Hybrid Journal   (Followers: 11)
Journal of Nonlinear Dynamics     Open Access   (Followers: 6)
Journal of Nonlinear Mathematical Physics     Hybrid Journal   (Followers: 2)
Journal of Nuclear Physics, Material Sciences, Radiation and Applications     Open Access   (Followers: 6)
Journal of Optics     Hybrid Journal   (Followers: 17)
Journal of Photonics for Energy     Hybrid Journal   (Followers: 2)
Journal of Physical and Chemical Reference Data     Hybrid Journal   (Followers: 4)
Journal of Physical Chemistry B     Hybrid Journal   (Followers: 48)
Journal of Physical Chemistry C     Hybrid Journal   (Followers: 36)
Journal of Physical Oceanography     Hybrid Journal   (Followers: 19, SJR: 2.461, CiteScore: 3)
Journal of Physical Organic Chemistry     Hybrid Journal   (Followers: 8)
Journal of Physics and Chemistry of Solids     Hybrid Journal   (Followers: 3)
Journal of Plasma Physics     Hybrid Journal   (Followers: 21)
Journal of Polymer Science Part B: Polymer Physics     Hybrid Journal   (Followers: 22)
Journal of Porous Materials     Hybrid Journal   (Followers: 4)
Journal of Porphyrins and Phthalocyanines     Hybrid Journal   (Followers: 1)
Journal of Quantitative Spectroscopy and Radiative Transfer     Hybrid Journal   (Followers: 3)
Journal of Reinforced Plastics and Composites     Hybrid Journal   (Followers: 30)
Journal of Rheology     Full-text available via subscription   (Followers: 7)
Journal of Sandwich Structures and Materials     Hybrid Journal   (Followers: 4)
Journal of Scientific Research     Open Access  
Journal of Sensors     Open Access   (Followers: 25)
Journal of Sol-Gel Science and Technology     Hybrid Journal  
Journal of Solid State Physics     Open Access   (Followers: 8)
Journal of Spectroscopy     Open Access   (Followers: 6)
Journal of Superconductivity and Novel Magnetism     Partially Free   (Followers: 1)
Journal of Synchrotron Radiation     Open Access   (Followers: 3)
Journal of the American Society for Mass Spectrometry     Hybrid Journal   (Followers: 31)
Journal of the ICRU     Hybrid Journal  
Journal of the Korean Physical Society     Partially Free  
Journal of the Physical Society of Japan     Hybrid Journal   (Followers: 2)
Journal of Theoretical and Applied Physics     Open Access   (Followers: 9)
Journal of Tissue Engineering     Open Access   (Followers: 6)
Journal of Ultrasound in Medicine     Full-text available via subscription   (Followers: 11)
Journal of Vibration and Control     Hybrid Journal   (Followers: 43)
Journal of Visualization     Hybrid Journal   (Followers: 3)
Journal of Zhejiang University : Sceince A     Hybrid Journal  
JPSE (Journal of Physical Science and Engineering)     Open Access  
Jurnal Fisika     Open Access  
Jurnal Ilmiah Pendidikan Fisika Al-Biruni     Open Access  
Jurnal NEUTRINO     Open Access  
Jurnal Online of Physics     Open Access  
Jurnal Pendidikan Fisika Indonesia (Indonesian Journal of Physics Education)     Open Access  
Jurnal Penelitian Fisika dan Aplikasinya     Open Access  
Jurnal Penelitian Sains (JPS)     Open Access  
Karbala International Journal of Modern Science     Open Access  
Kasuari : Physics Education Journal     Open Access  
La Rivista del Nuovo Cimento     Hybrid Journal  
Lasers in Surgery and Medicine     Hybrid Journal   (Followers: 1)
Latvian Journal of Physics and Technical Sciences     Open Access  
Letters in High Energy Physics     Open Access  
Letters in Mathematical Physics     Hybrid Journal   (Followers: 4)
Light : Science & Applications     Open Access   (Followers: 3)
Living Reviews in Computational Astrophysics     Open Access   (Followers: 3)
Living Reviews in Relativity     Open Access  
Living Reviews in Solar Physics     Open Access   (Followers: 1)
Lubrication Science     Hybrid Journal   (Followers: 2)
Macalester Journal of Physics and Astronomy     Open Access   (Followers: 6)
Machining Science and Technology: An International Journal     Hybrid Journal   (Followers: 2)
Magnetic Resonance     Open Access  
Magnetic Resonance Letters     Open Access  
Magnetic Resonance Materials in Physics, Biology and Medicine     Hybrid Journal   (Followers: 3)
MAPAN     Hybrid Journal  
Mass Spectrometry Reviews     Hybrid Journal   (Followers: 30)
Matéria (Rio de Janeiro)     Open Access  
Materials and Design     Open Access   (Followers: 47)
Materials at High Temperatures     Full-text available via subscription   (Followers: 3)
Materials Chemistry and Physics     Full-text available via subscription   (Followers: 15)
Materials Research Bulletin     Hybrid Journal   (Followers: 25)
Materials Research Innovations     Hybrid Journal   (Followers: 1)
Materials Science     Hybrid Journal   (Followers: 8)
Materials Science and Engineering: A     Hybrid Journal   (Followers: 44)
Materials Science and Engineering: B     Hybrid Journal   (Followers: 22)
Materials Science and Engineering: R: Reports     Hybrid Journal   (Followers: 15)
Materials Science and Technology     Hybrid Journal   (Followers: 40)
Materials Today Physics     Hybrid Journal   (Followers: 1)
Matériaux & Techniques     Full-text available via subscription   (Followers: 2)
Mathematical Physics, Analysis and Geometry     Hybrid Journal   (Followers: 3)
Mathematics and Mechanics of Solids     Hybrid Journal   (Followers: 3)
Matter and Radiation at Extremes     Open Access   (Followers: 1)
Meccanica     Hybrid Journal   (Followers: 1)
Mechanics of Advanced Materials and Structures     Hybrid Journal   (Followers: 6)
Mechanics of Materials     Hybrid Journal   (Followers: 25)
Mechanics of Time-Dependent Materials     Hybrid Journal   (Followers: 2)
Mechanics Research Communications     Hybrid Journal   (Followers: 4)
Medical Physics     Hybrid Journal   (Followers: 17)
Micro and Nano Systems Letters     Open Access   (Followers: 6)
Microfluidics and Nanofluidics     Hybrid Journal   (Followers: 11)
Microporous and Mesoporous Materials     Hybrid Journal   (Followers: 9)
Modern Instrumentation     Open Access   (Followers: 57)
Modern Physics Letters A     Hybrid Journal   (Followers: 14)

  First | 1 2 3 4 | Last

Similar Journals
Journal Cover
Journal of Reinforced Plastics and Composites
Journal Prestige (SJR): 0.543
Citation Impact (citeScore): 2
Number of Followers: 30  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 0731-6844 - ISSN (Online) 1530-7964
Published by Sage Publications Homepage  [1174 journals]
  • Rapid prediction of fibre-dominant tensile failure in randomly oriented
           strands

    • Free pre-print version: Loading...

      Authors: André Jesus, Xiaodong Xu
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      A stochastic morphological modelling framework has been established to predict the tensile behaviour of Randomly Oriented Strands made of ultra-thin Carbon Fibre Reinforced Thermoplastic prepreg tapes. The tape properties from their distributions are generated in a Monte Carlo simulation. The Young’s modulus of a laminate is accurately predicted using classical laminate theory. Fibre-dominant tensile failure is also accurately predicted in Carbon Fibre Reinforced Thermoplastics Sheet Moulding Compounds using Weibull theory. Material discontinuity is accounted for via the introduction of a stress concentration factor, as a result of tape overlaps. The predicted tensile strength values and scatter were found to increase with increasing tape length, which agrees well with literature data, and thus demonstrates the reliability of the proposed modelling framework. The rapid modelling framework is well-suited for application in structures.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-06-21T06:55:05Z
      DOI: 10.1177/07316844221107927
       
  • Free vibration analysis of polymer pin-reinforced foam core sandwich
           composite panels

    • Free pre-print version: Loading...

      Authors: Md Asif Rezwan Shishir, Zhaoyuan Zhang, Deng’an Cai, Xinwei Wang, Qinghua Xu
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      This study deals with numerical and experimental free vibration analysis of through-the-thickness cylindrical polymer pin-reinforced foam core sandwich composite panels of two different core thicknesses. Four different pin-reinforcement configurations with varying pin diameters and pin center distances were used. First five non-zero eigenfrequencies were retrieved along with their eigenmodes in the numerical analysis. Experimental modal analysis was done for the validation of the numerical analysis. The results revealed that the pin-configuration with the densest pin allocation and the biggest pin diameter provided the highest natural frequencies, and the non-reinforced composites had the lowest natural frequencies. The increase in the pin diameter had a slightly more pronounced effect on the increase of the eigenfrequencies than the increase in the pin’s densities. This work also demonstrated the impact of the core thickness on the natural frequencies.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-06-06T09:20:34Z
      DOI: 10.1177/07316844221105287
       
  • Determination and application of posture adjustable domain under
           constraints of placement quality

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      Authors: Weiwei Qu, Jiaxin Gao, Yaoyao Ye, Di Yang, Ruming He, Qian Yang, Liang Cheng, Yinglin Ke
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      This paper defines the adjustable domain of placement posture during automatic fiber placement process and determines the critical size of the adjustable domain under the constraints of placement quality. The influence of the posture deflection on the placement quality is analyzed first, and compaction and slippage of tows are determined as the main constraints. Simulation models of tow compaction under variable deflection angles are established, and the influence of deflection angle and direction on tow compaction is analyzed. The friction coefficient is measured by experiments to characterize the friction behavior of the tow, and a tow slip criterion was established to avoid unacceptable defects. Combining the above constraints, posture adjustable domain is obtained and the influence of various parameters is analyzed. A searching method is established to calculate the collision-free posture in the adjustable domain and applied on a complex mold surface. The results show that the posture adjustable domain can effectively ensuring the placement quality when the placement head is deflected to avoid collision.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-06-03T02:45:42Z
      DOI: 10.1177/07316844221105657
       
  • Study on mode I interlaminar fracture toughness of laminated plates
           considering interface angle

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      Authors: Qiwen Ma, Yonggui Zhang, Jianhui Liu
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      Multidirectional laminates are more widely used in practical engineering, and their fiber bridging characteristics are more obvious than unidirectional laminates. Due to the deficiency of research on the relationship between interface angle and interlaminar fracture toughness of multidirectional laminates, the numerical model of interface mode I fracture toughness of multidirectional laminates related to interface angle is modified by analyzing the difference between steady-state fracture toughness and initial fracture toughness of each interface. Meanwhile, the mode I interlaminar fracture toughness of multidirectional composite laminates under five interface modes is studied. Based on the finite element software, the cohesion model is established and verified. The analytical results are in good agreement with the experimental data, and the modified model can better verify the relationship between interface angle and interlaminar fracture toughness. At the same time, the fiber bridge force in the process of delamination along different interfaces is calculated, which provides a basis for the modified model.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-05-28T09:58:00Z
      DOI: 10.1177/07316844221105284
       
  • Prediction of compressive strength of fiber-reinforced polymers-confined
           cylindrical concrete using artificial intelligence methods

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      Authors: Faride Jamali, Seyed Roohollah Mousavi, Abdolhamid Bahr Peyma, Yaser Moodi
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      Compressive strength is the ability of materials to withstand loads without deformation or cracking. It is one of the most important criteria for evaluating the properties of concrete. The use of Fiber-Reinforced Polymers (FRP) to Strengthen concrete columns and as a supplement to improve some properties of concrete materials has received much attention in recent decades. Therefore, it is important to investigate and determine the compressive strength of confined concrete with FRP sheets. In this study, a comprehensive database containing 1066 specimens of concrete cylinders confined with FRP sheets has been collected. Then, using machine learning methods, the estimation and evaluation of the compressive strength of the mentioned specimens were discussed. The artificial neural network of multilayer perceptron (MLP) and support vector regression (SVR), fuzzy neural inference system (ANFIS), and its combination with particle swarm algorithm (PSO) and kriging interpolation method are the methods used in this study. Subsequently, these methods were compared with the models presented in previous studies. The results of this comparison show that the kriging interpolation method with a correlation coefficient of 0.985 in estimating compressive strength has the lowest error compared to other models.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-05-27T11:04:50Z
      DOI: 10.1177/07316844211068116
       
  • Interlaminar shear strength of hybrid fiber reinforced polymer bars: Based
           on proposed and existing test methods

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      Authors: Danying Gao, Yu Zhang, Fangzheng Wen, Jiyu Tang, Dong Fang, Yuyang Pang, Yongming Yan
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      In this study, a new test method, namely, the direct shear method was proposed to obtain the interlaminar shear strength (ILSS) of hybrid fiber reinforced polymer (HFRP) bars, which combined the advantages of standard methods in ASTM-D4475 and ASTM-D3914. The test device matched with this new method was also developed. Meanwhile, to verify the validity of this method, a total of 165 specimens were prepared to test the ILSS of carbon/glass-HFRP bars based on the proposed and other two existing standard methods, respectively. Additionally, the effects of the volume fraction and distribution pattern of carbon fiber, and the volume fraction of resin on the ILSS of carbon/glass-HFRP bars were systematically studied. The results show that the ILSS of carbon/glass-HFRP bars slowly decreases with the increase in the volume fraction of carbon fiber, and the ILSS of carbon/glass-HFRP bars with the dispersed distribution of carbon fiber is averagely 14.7% higher than that of specimens with the centralized arrangement of carbon fiber. The ILSS of carbon/glass-HFRP bars first rises and then reduces with the increase in the volume fraction of resin until it is nearly 40%.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-05-26T12:11:10Z
      DOI: 10.1177/07316844221080579
       
  • Prediction of laminate delamination from strength failure of interlaminar
           matrix-layer

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      Authors: Junchen Zhou, Zheng-Ming Huang, Wu Xu
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      Prediction of laminate delamination can be achieved by assessing strength failure of an interlaminar matrix-layer inserted in between the laminae, but the thus obtained matrix-layer stresses are generally out of expectation. In this paper, two MCs (modification coefficients) determined from the loads for measuring Modes I and II interlaminar fracture toughnesses are utilized to refresh the normal and shear stresses of matrix-layer, so that the matrix-layer would fail before a laminate failure. This method proves appropriate to simulate delamination induced by different loads. Once the modified stresses of a matrix-layer element fulfill a strength failure condition, it is deleted and the two adjacent lamina elements are delaminated from each other. The delamination behavior and its influence on the ultimate load sustainability of the laminate are investigated. Good correlation between predicted and measured results under different loading modes confirms the efficiency of this work.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-05-26T05:29:45Z
      DOI: 10.1177/07316844221105289
       
  • A numerical model for analysis of layer thicknesses on ballistic
           resistance of a multilayer armor

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      Authors: Yelda Ozdil Kacan, Faruk Elaldi
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      The interest in composite materials, which are lighter and have better mechanical properties (strength, fatigue resistance, corrosion resistance, etc.) than traditional engineering materials, is increasing day by day. In particular, their responses to low or high-velocity impact loads have been among the important research topics of recent years. In this study, unlike the traditional ceramic-based composite armor structures used in the defense industry, the effect of total carbon fibers specifically parallel oriented into impact direction on penetration resistance has been investigated, and penetration resistance of a multilayer hybrid composite armor which is composed of carbon fiber composite blocks sandwiched by two armor steel plates exposed to high-velocity impact has been analyzed numerically. Carbon fibers are normally very brittle to the transverse loading direction, contrarily, to their axial tension or compression direction. This is the reason why it is claimed that this high compression strength property of carbon fibers could be used as a layer in order to replace ceramics in add-on multilayer composite armor. The numerical model created in the ANSYS LS-DYNA program was verified by using the experimental data obtained in an earlier study. The verified numerical model was used to analyze high-velocity impact simulations of multilayer hybrid composite armor for different thicknesses of armor steel to reduce the areal density. By these simulations, minimum areal density compared to Rolled Homogeneous Armor steel for equivalent protection was finally achieved, and thus the hypothesis saying that carbon fibers parallel oriented to impact direction can give high penetration resistance was proved by showing that developed multilayer carbon fiber reinforced epoxy composite–armor steel hybrid panels have indicated a better protection level than STANAG 4569 Level-4 with a lower areal density.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-05-23T01:52:03Z
      DOI: 10.1177/07316844221104144
       
  • Recent advances in experimental and molecular dynamics study of
           graphene-oxide/natural rubber composites: A review

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      Authors: Aviral Srivastava, Sumit Sharma
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      Rubber nanocomposites are being studied because of their unique characteristics. Fillers are used in rubbers and elastomers to increase certain qualities for their ultimate uses. Fillers are used to strengthen rubber such as graphene/graphene oxide for the majority of activities. The hardness, modulus, anti-ageing and gas barrier properties of nanofilled-reinforced rubber are greater than pristine rubber. Studies from the literature depicted 150% increment in elastic modulus, 27.6% increment in modulus of rigidity and 35% increment in hardness of nitrile butadiene rubber when reinforced with graphene oxide (GO). Bulk, shear and Young’s modulus of vulcanised rubber rises by 19.13%, 21.11% and 26.89% when infused with carbon nanotube. Because of its unique electrical, thermal and mechanical characteristics, rubber nanocomposites loaded with GO are also in high demand in industrial applications. Rubber nanocomposites, different nanofillers like graphene and graphene oxide and their benefits have been discussed. The review also outlines the rubber/GO nanocomposites' production procedures, novel characteristics and possible uses.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-05-21T09:58:31Z
      DOI: 10.1177/07316844221102939
       
  • Study the effect of stirrer design on the stirring performance of ceramic
           particle reinforcements in stir casting of Aluminum Matrix Composites

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      Authors: Farooq Muhammad, Shawnam Jalal
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      Stir casting is one of the vital methods for making aluminium alloy matrix composites. The main challenge of this technique is getting a homogenous dispersion of reinforcement particles. The uniform distribution of reinforcement particles improves the mechanical properties, so the stirrer must be designed so that it achieves uniform distribution. The main process of stir casting is done in a closed crucible at high temperature with a hidden flow pattern under a variety of various influencing variables; therefore, numerical is more realistic than the analytical approach for forecasting problems. This paper aims to choose the most efficient stirrer design among four different stirrers to attain the best reinforcement particle distribution in the least time in a selected case. ANSYS CFX, the Image process, and visual experiments were conducted to select the optimal stirrer design. This study is unique in that it provides a new methodology for optimizing the stirrer design, and identifying simulation obstacles and future simulation scope for the mixing performance simulation programmers. Finally, any effort to improve mixing efficiency will very certainly result in lower total energy use, fossil fuel consumption, and CO2 emissions, which is the goal of the millennium.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-05-21T04:33:46Z
      DOI: 10.1177/07316844221101579
       
  • Effect of residual-stress evolution during curing process on fatigue-life
           of fiber-reinforced polymers

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      Authors: Utkarsh Thakre, Asim Tewari
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      The fabrication process of Fiber-reinforced polymer (FRP) composite leads to the formation of residual stresses. The effect of these stresses may be insignificant on the monotonous properties like tensile strength etc. However, residual stresses can significantly affect the fatigue performance of the FRP composites. There is lack of rigorous analysis on connecting the evolution of residual stress and the fatigue life of FRPs. A multi-physics analysis was performed to model the evolution of residual stresses in the curing process under different process and material conditions for unidirectional Glass Fiber Reinforced Polymers. The viscoelastic model also accounted for percolation in the matrix and thus gave realistic estimates of residualstress compared to the past elastic models. It was found that the residual-stress varied by over 25% by just changing the cure thermal cycle. The stress prediction results were found to be in-line with the experimental results reported in the literature. A numerical model was developed to obtain a change in the fatigue life (fiber-dominated failure mode in High Cycle fatigue (HCF)) from residual stresses under the simulated circumstances. This numerical model was validated with the experimental fatigue data using two different cure cycles. Fatigue life for HCF was found to be improved by upto 4% under such conditions. Thus, this study gives insight on various processes and material property handles for manipulation of the residual stresses. Accurate numerical prediction of such stresses can be cardinal in composites processing.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-05-21T03:48:07Z
      DOI: 10.1177/07316844221101573
       
  • Experimental and numerical research on healing performance of reinforced
           microcapsule-based self-healing polymers using nanoparticles

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      Authors: Reza Barbaz-Isfahani, Saeed Saber-Samandari, Manouchehr Salehi
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      The effect of enhancing multicore microcapsules with various nanoparticles on the healing efficiency of microcapsule-based self-healing polymers was investigated in this study. The incorporated polymers with enhanced microcapsules by MWCNT, nanoclay, and nanosilica were fabricated. Three volume fractions (VFs) of microcapsules, including 5, 7.5, and 10% were added to the epoxy matrix. The maximum tensile stresses of the virgin, damaged by controlled low velocity impact test, and healed specimens were obtained to calculate the healing efficiencies of fabricated self-healing polymers. Also, a multi-scale FE modeling was promoted using RVEs generation and ABAQUS-Explicit solver attached with VUSDFLD subroutines to predict the healing efficiencies. The results indicated that by increasing the VF of microcapsules, the healing efficiencies of specimens were increased. Increasing the VF of the microcapsules could increase the probability of hitting induced cracks due to the LVI test with microcapsules. Thus, further spreading of healing agents into the propagated cracks would increase the healing efficiency of specimens containing higher VF of microcapsules. Also, increasing the strength of microcapsules reduced the healing efficiency of specimens. For instance, in the specimens containing 10% VF of enhanced microcapsules with MWCNT, the healing efficiency was 45.90%, while it was 50.41% for enhanced microcapsules with nanosilica. Increasing the mechanical properties of microcapsules could decrease the probability of rupturing damaged microcapsules, which reduced the healing efficiency of these specimens. Finally, the predicted healing efficiency of simulated RVEs had good accuracy, indicating the reliability of introduced multi-scale FEM.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-05-18T08:18:42Z
      DOI: 10.1177/07316844221102945
       
  • Modified phosphogypsum used as reinforcing material in composites

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      Authors: Min Sun, Qing Sun, Jian Zhang, Jiawei Sheng
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      High-density polyethylene (HDPE)/phosphogypsum (PG) or polypropylene (PP)/PG composites were produced using mass-produced PG powders and a twin screw extruder. The modification effect of calcium stearate was studied by oil absorption value, contact angle, and FTIR. XRD analysis indicated that the PG phase was affected by different calcination temperatures. The mechanical properties of the composite materials were evaluated by tensile and impact tests. The dispersion of PG in the matrix was showed by scanning electron microscope (SEM). Within the weight fraction range studied (5, 10, 15, 20, 25, and 30 wt%), the Young’s modulus and tensile strength of the PG/HDPE composites increased significantly, but the impact strength and elongation at break decreased remarkably. Young’s modulus and impact strength of PG/PP composites increase prominently, but tensile strength and elongation at break are significantly reduced. Thermodynamic analysis showed that PG can improve the thermal stability of composite materials. The apparent density indicated that the composite material filled with PG has the property of being lighter in weight. In these experiments, the mechanical properties of compounding PG powder with HDPE or PP were significantly improved, but the toughness of composites decreased.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-05-16T03:39:09Z
      DOI: 10.1177/07316844221102935
       
  • Adaptive winding pin and hooking capacity model for coreless filament
           winding

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      Authors: Pascal Mindermann, Götz T Gresser
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      Coreless filament winding is a manufacturing process used for fiber-reinforced composites, resulting in high-performance lightweight lattice structures. Load transmission elements, which are assembled from commercially available standardized parts, often restrict the component design. A novel adaptive winding pin was developed, which is made by additive manufacturing and can therefore be adjusted to specific load conditions resulting from its position within the component. This allows to decouple the fiber arrangement from the winding pin orientation, which allows a fully volumetric framework design of components. A predictive model for the pin capacity was derived and experimentality validated. The hooking conditions, pin capacity, and occupancy were considered in the creation of a digital design tool.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-05-13T12:31:25Z
      DOI: 10.1177/07316844221094777
       
  • Optimization of compressive property for the development of triply
           periodic minimal surface lattice structure on polylactic acid polymeric
           material

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      Authors: Sabarinathan Palaniyappan, Dhinakaran Veeman, Narain kumar Sivakumar, Ragavanantham Shanmugam
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      The present study deals with the process optimization of printing parameters for fabricating gyroid TPMS (triply periodic minimal surface) lattice structure incorporated compression samples on the polylactic Acid polymeric material for obtaining the maximum compressive strength. The design of experiments is followed for the process parameter optimization. The experiment was carried out by varying three printing process parameters and four levels such as printing speed (10 mm/sec, 20 mm/sec, 30 mm/sec, and 40 mm/sec), layer height (0.10 mm, 0.15 mm, 0.20 mm, and 0.25 mm), and nozzle temperature (190°C, 200°C, 210°C, and 220°C). The L16 orthogonal array is employed for the experimental procedure and the Taguchi optimization technique is utilized for the optimization of the printing process parameters for obtaining maximum compressive strength for the fabricated gyroid TPMS lattice structure incorporated compression samples. The experimental results confirm that printing speed and layer height have major influence of 57.28% and 30.92% on the compressive properties of the fabricated samples. Based on the regression analysis results, it can be concluded that the proposed mathematical model has observed an error percentage of 2.1% and a good fit has been observed with the experimental results. The macroscopic view of the fractured samples depicts that the sample fabricated at a nominal printing speed of 20 mm/sec and layer height of 0.10 mm has obtained the highest compressive strength and lower buckling during compression test. The optimized combination of printing process parameters for obtaining maximum compressive strength is 20 mm/sec, 0.10 mm, and 210°C.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-05-11T10:01:29Z
      DOI: 10.1177/07316844221099582
       
  • Microstructural characteristics and mechanical properties of thermally
           sprayed conventional ceramic coatings reinforced with multiwalled carbon
           nanotubes

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      Authors: Chaithanya Kalangi, Venkateshwarlu Bolleddu
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      This paper aims to develop a high-performance, cost-effective ceramic coating on AISI 1020 steel substrate. For this purpose, three kinds of conventional ceramic powders are taken in the composition Al2O3+3 wt%TiO2, WC+12 wt%Co and ZrO2+8 wt%Y2O3. The composites are coated on the steel surface using thermal spraying technology such as plasma flame for Al2O3+3 wt%TiO2 and ZrO2+8 wt%Y2O3 and high-velocity oxy-fuel for WC+12 wt%Co deposition. Recently, carbon nanotube–reinforced ceramic materials have gained more attention because of their excellent surface morphology properties. Adding nanocomposite to ceramic powders can considerably increase the microstructural characteristics and microhardness of thermal sprayed coatings. However, it is still challenging to obtain effective nanocomposite-doped conventional coating due to the elevated temperature of heat equipment. Thus, the conventional ceramic powders Al2O3+3 wt%TiO2, WC+12 wt%Co and ZrO2+8 wt%Y2O3 are combined with carbon nanotubes at a weight ratio of 1%, 3% and 5% for preparing reliable nanocomposite ceramic coating. The properties of nanocomposite mixed coatings are studied, and their performance is compared with conventional coatings. The coatings’ morphology, structure and phase composition are investigated through scanning electron microscopy and X-ray diffraction. In addition, Vickers microhardness and surface roughness are also determined.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-05-11T09:46:49Z
      DOI: 10.1177/07316844221099926
       
  • The electrical conductivity and interlaminar fracture toughness of
           composite laminate interleaved with silver-plated nylon mesh

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      Authors: Miaocai Guo
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      A composite laminate with high conductivity and high mode I fracture toughness was prepared by using a silver-plated nylon mesh as the interleaf. Through in-depth comparison with the silver-plated non-woven veil interleaved composites, the mechanisms of the conductivity improvement and interlaminar toughening were discussed. The conductivities along the fiber direction, in transverse to fiber direction and through thickness direction reached 739 S/cm, 734 S/cm, and 5.4 S/cm, respectively, which increased by 196%, 344,500%, and 4326%, respectively, and are much higher than these of the other modified systems. At the same time, the mode I interlaminar fracture toughness increased by 112%. Mechanism study shows that the conductivities along the fiber direction and in transverse to fiber direction are greatly affected by the interleaf conductivity, while the conductivity through thickness direction is little affected. The toughening mechanism of the plain or silver-plated nylon mesh is much different from that of the non-woven veils. Both of the composites interleaved with the plain or silver-plated nylon mesh have higher mode I interlaminar fracture toughness, but less improved mode II toughness. The effect of silver-plating on the mode I and mode II fracture toughness was studied.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-05-10T10:16:07Z
      DOI: 10.1177/07316844221099927
       
  • Long term accelerated influence on thermo-mechanical properties of
           glass/carbon fiber reinforced interpenetrating polymer network hybrid
           composites

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      Authors: Karjala Santhosh Priya, K R Vijaya Kumar, G Suresh, R Ganesamoorthy, R Vezhavendhan, C M Meenakshi
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      The prime importance of this work is that to compare the influence of hygrothermal analysis on the physical properties of different variant of interpenetrating polymer network (IPN) blend reinforced with E-Glass/Carbon and combination of both (hybrid) fibers. In this study, combinations of epoxy (EP)/polyurethane (PU), vinyl ester (VER)/polyurethane (PU), and epoxy (EP)/vinyl ester (VER) have been taken as the matrix material (IPN) to reinforce the glass, carbon, and combination of both fibers. Moreover, prepared specimens are subjected with boiling water immersion test by maintaining the temperature of 45°C, 55°C, and 65°C in order to thoroughly understand the influence of moisture absorption and temperature in their physical attribution as per ASTM standards. Besides, to better understand the thermal stability and compatibility, thermal-gravimetric (TGA) analysis and burn-off test were conducted as well. During this study, it was found that, combination of VER/PU possesses the high moisture absorption resistance amongst all variants (0.725% for 45°C, 0.854% for 55°C, 1.234 for 65°C). Similarly, epoxy/vinyl ester reinforced glass fiber IPN laminate (EVG) has shown notable TGA value as 418.6°C, as well burn-off test also shown that hybrid IPN composites have better wettability (less void presence) than all other laminates (EPGC-0.9%, VPGC-0.89%, EVGC-0.92%). Further, losses of physical strengths have been noticed on all specimens upon subjection on hygrothermal environment irrespective of IPN blend and fiber constituents.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-05-06T05:57:43Z
      DOI: 10.1177/07316844221099951
       
  • Experimental investigation of mechanical and dynamic mechanical properties
           of sansevieria roxburghiana /epoxy composite using Taguchi design

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      Authors: T Murugan, B Senthil Kumar
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      The focus of this research was to study how process parameters including fibre alignment, fibre length, fibre volume percentage and alkali pretreatment affected the mechanical and dynamic mechanical characteristics (DMA) of the sansevieria fibre composite. The nonwoven fabric was produced through the needle punching technique. 18 composite samples have been produced according to L18 Taguchi design. Four different process parameters were considered for investigation, such as fibre length, fibre volume fraction, the concentration of alkali and fibre alignment. Using Design S/N ratio analysis, the optimized process parameters for achieving maximum tensile, flexural and compression properties of the composite were measured. In the case of DMA analysis, three different parameters have been calculated only for selected samples such as storage modulus, loss modulus and loss factor. Variance analyses were carried out to measure the statistical influence of the process parameters on response. After this, validation of experiments was also done. SEM study was also carried out to understand the damage pattern of the composite sample.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-05-05T04:03:52Z
      DOI: 10.1177/07316844221099577
       
  • Process optimization of compressive property and dimensional error on wood
           polylactic acid gyroid-structured polymer composite

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      Authors: Dhinakaran Veeman, Sabarinathan Palaniyappan, GJ Surendhar, Ragavanantham Shanmugam
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      In the fused deposition modeling (FDM) process, various thermoplastic filaments may be used as a feedstock material for the component fabrication. The present study involves incorporating a gyroid structure in wood/polylactic acid (PLA) polymer composite. The strength of the sample may reduce while incorporating lattice structure in PLA polymeric samples. There are certain difficulties due to the wide availability of process parameters that may vary the quality and strength during the fabrication of the sample through the FDM process. Determining the influence of certain important process parameters such as raster angle, layer thickness, and wall thickness is carried out in this research to attain higher mechanical strength and less dimensional error in the geometry of the fabricated sample. Taguchi L9 orthogonal array is used in these experiments to optimize process parameters in the gyroid incorporated samples. The output responses in the present study are compressive strength and dimensional error. Both the output responses were predicted using the ANOVA technique. Both the output responses are greatly influenced by the raster angle with the value of 60.78% in compressive strength and 90.43% in the dimensional error, and Wall thickness is the least influenced process parameter with the value of 7.17% in compressive strength and 0.93% in dimensional error. The sequential order of influencing process parameters in both the compressive strength and dimensional error were raster angle> layer thickness> wall thickness. 31.019 MPa of compressive strength was observed in the confirmational compression test. The prepared composite can be used as a structural material in the replacement of balusters and handrails.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-05-04T12:24:00Z
      DOI: 10.1177/07316844221096486
       
  • A manta-ray-inspired bionic curing mold for autoclave process of composite
           manufacturing

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      Authors: Hao Li, Yi Lin, Lingyun Wang, Qiang Xu, Yinglin Ke
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      The temperature distribution of the mold is directly linked to the manufacturing quality of the composite component. In this paper, a bionic mold based on the analysis of a manta ray in swimming is developed to improve the thermal performance of the mold during the autoclave curing process. The bionic mold has fewer frames and better air permeability, and the mold weight is decreased by 42.95% while the stiffness is proved to satisfy the requirement. The model of the autoclave curing process which is verified by experiments is established to carry out the thermal analysis of the mold. Results show that the air velocity in the mold is increased with the bionic design, which can reduce not only the maximum temperature difference of the mold plate (−30.35%) but also the percentage of low-temperature areas. Besides, the heating rate and the heat preservation time of the mold are also improved.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-05-03T03:51:32Z
      DOI: 10.1177/07316844221093407
       
  • Graphene and its derivative reinforced tungsten–copper composites for
           electrical contact applications: A review

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      Authors: Magdalena Valentina Lungu, Alexandra Barbu
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      This review summarizes the advancement on sintered composites based on tungsten–copper (W–Cu) reinforced with graphene (Gr) or its derivative such as reduced Gr oxide (rGO) for use as electrical contacts applied in switching devices. Main synthesis approaches for preparing Gr or rGO reinforced W–Cu composite powders and their consolidations by using various powder metallurgy techniques are presented. The nature of the initial materials, synthesis conditions, processing parameters, and the relevant findings are disclosed and discussed. The improvement in microstructure and technical characteristics like density, electrical conductivity, hardness, coefficient of friction, wear rate, and arc ablation behavior of W–Cu–Gr/rGO composites are highlighted comparatively with that of unreinforced composites. This review reveals an insight into a novel class of composites as candidates for electrical contact applications.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-04-27T02:37:49Z
      DOI: 10.1177/07316844211063869
       
  • Melt-blown fiber mat interleaving enhances the performance of
           single-polypropylene composites

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      Authors: Yahya Kara, Kolos Molnár
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      In this study, we demonstrate that integrating melt-blown fiber mat interleaves into single-polypropylene composites enhances several mechanical properties and influences the morphology positively. Polypropylene veils were generated by melt blowing. We then created single-polypropylene composites by film-stacking in which we applied a film as a matrix, a woven fabric as primary reinforcement, and the melt-blown fiber mats as interleaves. The tensile modulus was improved in the range of 20%–46%, and the interlaminar shear strength and the perforation energy at impact were increased by 17% and 14%, respectively, due to interleaving. Master curves were constructed from dynamic mechanical analysis frequency sweep tests based on the time–temperature superposition principle. The storage modulus significantly increased while the tanδ decreased. The interleaving considerably reduced the delamination by creating a net-like structure leading to superior interfacial adhesion. The interleaving demonstrated in this study can promote single-polymer composites’ utilization in various engineering applications where high toughness and impact resistance are required.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-04-21T07:20:50Z
      DOI: 10.1177/07316844221087736
       
  • Axial compressive behaviour of CFST column externally reinforced by CFRP
           strips – A design of experiments approach

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      Authors: Ganesh Prabhu Ganapathy
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      The purpose of this research is to investigate the influence of CFRP strips wrapping scheme (partial wrapping) in strengthening of CFST column subjected to axial compression. To complete the experimental investigation in an economical way, the central composite design (CCD) of the response surface methodology (RSM) was used to design the experiments. Based on the CCD experimental model, 9 unique tests were performed and the failure mode of the specimens, load–deformation behaviour, ultimate strength and ductility behaviour were studied. The test results showed that externally bonding CFRP strips is an effective approach to restraining axial deformation and enhancing the ultimate capacity of the column under compression. By bonding three layers of CFRP strips, the deformation of the columns was restricted to a maximum of 55.78% and 50.27% compared to the column bonded with one layer, when set at spacings of 20 mm and 30 mm, respectively. The ANOVA, Pareto chart and contour plot of RSM revealed that the layers of the CFRP wrapping scheme was more significant than the strips spacing in increasing the strength capacity of the CFST column. The suitability of design models proposed in various literatures for predicting the strength capacities of CFST columns strengthened with CFRP wrapping scheme was also examined. A simple design model, derived considering the column geometry and material strength of column and CFRP composites, was proposed to predict the axial strength capacities of CFST short columns confined by CFRP strips by using regression analysis. The proposed design model provides a more accurate and reasonably stable prediction compared with other existing design models.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-04-19T02:17:52Z
      DOI: 10.1177/07316844221085653
       
  • Recent developments in manufacturing, mechanics, and design optimization
           of variable stiffness composites

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      Authors: Devesh Punera, Paulomi Mukherjee
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      The functional advantages of tailored stiffness, often seen in nature, are also utilized in composite structures. Advancements in the multiaxis tow placement and automated fiber placement (AFP) machines led to the development of variable angle tow (VAT) composites, also referred further as variable stiffness composites (VSC). These composites are shown to effectively enhance the stress distribution and buckling load capacity of structures with greater flexibility on the design space. This review systematically presents the status of recent research on the topic of VSCs. Various manufacturing techniques of VSC are discussed; constraints and the defects associated with the manufacturing processes are enlisted. The review highlights the optimization studies based on the fiber profile and macro-scale stiffness invariants. Several studies existing in the domain of buckling, vibration, and aeroelastic tailoring of angle tow composites are summarized to connect the important aspects of analysis and present a holistic approach for future studies in this area.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-04-15T12:16:53Z
      DOI: 10.1177/07316844221082999
       
  • Simplified indentation mechanics to connect nanoindentation and low-energy
           impact of structural composites and polymers

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      Authors: Luoyu R Xu, Md Shariful Islam, Ricardo Martinez, Mark Flores, Kai Zhao, Alp Karakoҫ, Ertugrul Taciroglu
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      Nanoindentation (nanometer scale, extremely small) and impact (microsecond scale, extremely fast) experiments are two important techniques for characterizing modern material systems. However, these two experiments were often studied individually. In this pilot study, a multiscale indentation mechanics approach is proposed to correlate these two very different mechanics events acting on the same target materials using a spherical indenter and a projectile. The contact stiffness of nanoindentation of a target material is fitted using Hertz’s contact law, and then the contact stiffness of impact is obtained using a simplified multiscale relation. Therefore, the maximum impact force of a projectile impact can be predicted by inputting the impact energy and the contact stiffness of impact. The above new approach was validated by drop-weight impact experiments of polymers and structural composite materials subjected to low-energy impact. Results show that only a few minutes are needed to predict the maximum impact force.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-03-26T07:00:33Z
      DOI: 10.1177/07316844211072250
       
  • Probing mechanical properties of graphene oxide/epoxy composites based on
           nano indentation technique

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      Authors: Cun Zhao, Yufen Zhao, Xiaoyuan Pei, Shengkai Liu, Yuanhua Xia, Chunying Min, Ruiqi Shao, Chunhong Wang, Wei Wang, Zhiwei Xu
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      The silanized graphene oxide (KH-GO) with different mass fractions was dispersed in epoxy resin by a solution blending method and resin transfer molding process. The nano indentation method was used to test the micromechanical properties of GO/epoxy composites with different mass fractions, and the effect of GO on the hardness of epoxy matrix composites was quantitatively determined, and the influence of adding KH-GO on the thermal mechanical and bending properties of epoxy resin was discussed by dynamic thermal mechanical and universal strength machine tests. The experimental results show that the thermal and mechanical properties of composites are improved with the increase of the amount of KH-GO. Especially, when the content of KH-GO was 0.3%, the bending strength (125.4 MPa), hardness (281.0 MPa), and glass transition temperature (99.6°C) of composites reached the highest. It was proved that the composites showed its excellent performance and the silane coupling agent was successfully grafted to the graphene oxide by covalent bond, which effectively improved the interface compatibility of the reinforcing body and the matrix and was related to good dispersibility in the epoxy resin. This method is simple and effective, providing a certain reference value for the enhancement of the mechanical properties of the next generation of nanocomposites.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-03-25T11:52:33Z
      DOI: 10.1177/07316844221075706
       
  • Damping behaviour and self-healing performance evaluation of microcapsules
           reinforced epoxy composites by impulse excitation technique

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      Authors: Raj Kumar Pittala, Goteti Dhanaraju, Satish Ben Beera, Avinash Ben Beera
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      Micro cracks developed in the composite structures can be repaired autonomously by incorporating microcapsules-based self-healing approach into the composites. In the current study, in order to employ self-healing composites in different structural applications, damping behaviour and self-healing performance of the composites were evaluated. CY230 epoxy and HY951 hardener were chosen as two different self-healing agents and encapsulated in polymethylmethacrylate (PMMA) shell material. Dual microcapsules reinforced carbon fibre epoxy composites were fabricated by employing 15wt% of microcapsules at 1:1 weight ratio and 0.5:0.5 weight fractions of matrix reinforcement. Influence of microcapsules addition and induced damages on the damping behaviour and self-healing performance of the pure epoxy and pure carbon fibre reinforced polymer (CFRP) composites were investigated by impulse excitation technique (IET). It was noticed that with the addition of respective optimized 7.5 wt%, 15 wt% microcapsules to pure epoxy and pure CFRP, damping factor of both the composites increased whereas elastic modulus decreased. Compared to capsules reinforced virgin composites, damping factor of damaged composites was higher in both types of composites. Self-healing efficiency of capsules reinforced pure epoxy and carbon fibre epoxy composites were calculated based on the recovery in stiffness of the composites and noticed respective healing efficiencies of 72.05% and 53.72% at optimized healing conditions and microcapsules concentration.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-03-23T04:25:30Z
      DOI: 10.1177/07316844221077952
       
  • Computer aided path design for filament winding torus

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      Authors: Haisheng Li, Yonghao Ma, Mingkun Li
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      The torus is a promisingly potential alternative to traditionally cylindrical pressure vessels due to its capability to store more hydrogen energy within limited space. Constant angle winding is widely used in practical filament winding. Hence, it is necessary to study constant angle winding on the torus. This paper presents constant winding angle curve on torus, a new winding trajectory, and gives a sufficient and necessary condition that makes it nonslip and non-bridging, and a computational formula for determining the lower bound of the winding angle of stable constant winding angle curve. By combining with semi-geodesics, we propose an integration design method for winding pattern and develop a computer aided path design system for filament winding torus, which can design constant angle winding pattern or approximate equilibrium winding for toroidal composite pressure vessels. Since our approach uses constant winding angle curve and integration trajectories besides semi-geodesics, our method has more design space for optimizing fiber path, and outperforms the existing methods.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-03-22T02:03:59Z
      DOI: 10.1177/07316844221075701
       
  • A novel flax fibre composite material for stringed instrument fingerboards

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      Authors: Olivier Chabot, Larry Lessard, Martine Dubé
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      With growing restrictions on the exploitation and trade of current stringed musical instruments fingerboard materials such as ebony and rosewood, for economical and ethical reasons, instrument makers are looking for alternative materials. The present work describes the development of a homogeneous 60% bio-based flax fibre composite material with physical properties similar to commonly used fingerboard woods. As a proof of concept, prototype guitar neck was built using the material, demonstrating its compatibility with existing guitar manufacturing techniques.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-03-04T09:22:45Z
      DOI: 10.1177/07316844211067540
       
  • The cooperative effect of short-cut carbon fiber and carbon black on the
           performance of electric-driven morphing skins

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      Authors: Xiaoming Ren, Guangming Zhu
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      Shape memory polymers (SMPs) with variable stiffness properties become the most promising candidate materials for morphing skins. Due to the influence of external environment, electric-driven composite skin is becoming the trend of development. In this paper, rubber toughed hydro-epoxy morphing skins filled with conductive carbon black (CB) and short-cut carbon fiber (SCF) were prepared. The total mass fraction of CB and SCF was fixed at 2.6 wt %. By adjusting the content ratio of CB and SCF (CB/SCF), the in-plane mechanical property, fracture morphology, thermal-mechanical behavior, electronic resistivity, and out-of-plane shape memory behavior of five types of skin were investigated. These results showed that the addition of CB and SCF had a synergistic effect on skin performance. When CB/SCF was 5:5, the composite skin had the highest tensile strength and the lowest glass transition temperature (Tg). In the thermo-active shape memory test, the composite skin presented good shape fixity rate (Rf) and shape recovery rate (Rr). Due to the bridging effect of SCFs on CB particles, the composite skin with CB/SCF ratio of 5:5 has the minimum resistivity and can return to its initial shape within 29 s at 60 V.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-03-03T07:25:24Z
      DOI: 10.1177/07316844221075387
       
  • An experimental study of the dynamic responses of carbon fiber reinforced
           polymer composite laminates subjected to ice impact

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      Authors: Dacheng Li, Xiongwen Jiang, Licheng Guo, Runqiang Chi, Wenbo Xie, Wei Zhang
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      The aircraft structures are threatened by soft material impact such as birds and hail ices. The main objective of this study is to develop a comprehensive experimental method to evaluate the resistance performance of carbon fiber reinforced polymer laminate subjected to ice impact loadings. First, a hollow tube sensor was adopted to measure the impact force of ice projectiles. Based on the deformation process captured by a high-speed camera and the analysis on transmitted energies obtained by the tube sensor, the repeatability of the ice impact loadings was confirmed and its impact behavior was analyzed. Second, six T700/epoxy carbon reinforced polymer laminates were impacted with different loading velocities, where the transient deformation data during impact were obtained by 3D digital image correlation method The post-test detection was realized using both optical microscopes and scanning acoustic microscopes. The impact of ice projectiles resulted in distributed loadings on the laminate targets with invisible inner matrix cracks and delaminations. Irregular distributions of delaminated areas subjected were observed and their sized increased with the impact velocity. The experimental method showed its practicability on impact issues with projectiles of unknown properties.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-03-01T03:47:53Z
      DOI: 10.1177/07316844211073762
       
  • Failure analysis of composite repaired pipes subjected to internal
           pressure

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      Authors: Ardeshir Savari
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      While around 60% of pipelines transmitting oil and gas worldwide experience corrosion and metal loss, the composite repair technique has become a popular option developed in recent decades. Employing a theoretical methodology, this study deals with corroded metallic pipes repaired by composite repair systems such that the focus is the impact of elastoplastic deformations on the failure pressure. In this methodology, the elastoplastic strains are taken into account by employing the bilinear isotropic hardening plastic flow theory with the von Mises yield criterion. Three modes are recognized based on the region where failure occurs, and the results are presented. The findings revealed that when the failure happens in the defect region, the proposed formula estimates the failure pressure more accurately than when it occurs either far from the defect or in the composite sleeve. Moreover, studying the bonding strength between the pipe, infill material, and composite patch shows that the interface bonding strength between the pipe and the polymer filler plays a more significant role than the interface bonding strength between the polymer filler and the composite repair. The results of this study can assist maintenance engineers in better evaluating the reliability of composite repaired pipelines.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-02-28T06:49:07Z
      DOI: 10.1177/07316844211070545
       
  • Experimental and numerical investigation of a thermal conductivity in the
           thermally drained carbon-fiber/epoxy composite materials for aeronautical
           applications

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      Authors: Jamal ARBAOUI, Jérémie AUCHER, Moussa GOMINA, Joël BREARD
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      The study focuses on the development of novel composite material with good transverse thermal conductivity able to dissipate the heat. This material will be associated with a cooling loop for transferring the heat from electrical equipment to the composite panel thermally drained and which posed at the fuselage of the aircraft. To achieve this goal, an extensive research was conducted in the thermal field leading to design a novel composite structure. The thermal conductivity of the composite materials selected in this work were assessed through experimental tests. Here, the material thermal conductivity was evaluated using measurements of density, thermal diffusivity, and specific heat. The thermal performances of material were described by the nature of constituents and reinforcement architecture. The current research highlights the influence of adding nickel coated carbon and nickel-plated copper wires on the braided composites. The results indicate that the High Tensile Strength (HTS) carbon braided manufactured with nickel-plated copper wires presents higher in-plane thermal conductivity (in direction parallel of the fibers) when comparing to HTS carbon and HTS carbon braided manufactured with nickel coated carbon. To gain more insight, a numerical model, based on the Finite Element Method was built. Besides, it helps to reduce the experimental matrix protocol. The results obtained by numerical and experimental investigation showed good correlation, which allowed to validate the numerical approach. In the end, the numerical model validated were used to optimize the structure of the composite material.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-02-28T02:59:21Z
      DOI: 10.1177/07316844211073334
       
  • Blast behaviour of fibre reinforced polymers containing sustainable
           constituents

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      Authors: Sherlyn Gabriel, Genevieve S Langdon, Christopher J von Klemperer, Steeve Chung Kim Yuen
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      As the use of more sustainable natural fibres and bio-based resins in fibre reinforced polymers (FRPs) becomes more widespread, their susceptibility to damage due to explosive detonation needs to be evaluated. In this paper, flax and jute FRP panels were blast tested and compared to equivalent mass glass FRP panels. Comparisons were made between flax and glass FRPs manufactured using a synthetic Prime 20 epoxy and a Super Sap epoxy resin containing bio-based raw materials. The transient measurements revealed that all the FRPs exhibited high-peak displacements and viscously damped elastic vibrations. The results showed the predominance of fibre strength and stiffness, and the lesser influence of resin system. The presented modified non-dimensional analysis approach could be extended to predict peak displacement of FRPs during blast events in the future. The failure mode progression for each panel type was identified, providing unique and detailed insights for designers and blast protection engineers. The work should prove valuable to blast protection engineers considering the effects of explosive detonations on structures containing FRPs.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-02-25T09:48:12Z
      DOI: 10.1177/07316844211072529
       
  • Statistical life prediction of a unidirectional carbon fiber/polypropylene
           laminates under creep bending load

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      Authors: Masayuki Nakada, Yasushi Miyano, Yoko Morisawa, Taiga Nonaka, Takeharu Isaki, Taiki Hirano, Kiyoshi Uzawa
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      Our developed accelerated testing methodology (ATM) based on matrix resin viscoelasticity for the long-term life prediction of carbon fiber reinforced plastics (CFRP) was applied to assess the statistical prediction of long-term creep failure time of a carbon fiber/polypropylene unidirectional (CF/PP) laminates under creep bending load. Results show that the statistical long-term creep failure times under an arbitrary constant bending load and temperature for the CF/PP laminates can be easily predicted from the statistical static strengths of the CF/PP laminates measured at several temperatures and the viscoelasticity of matrix PP.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-02-25T03:46:14Z
      DOI: 10.1177/07316844211073596
       
  • A micromechanics-driven model for compressive fatigue of fiber-reinforced
           composites

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      Authors: Paul Davidson, Anthony M Waas
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      A micromechanics model to predict the fatigue life of fiber-reinforced polymer matrix composites (FRPC) is developed and used for estimating compressive fatigue failure of unidirectional carbon fiber composite. The micromechanics model utilizes constituent, fiber, and matrix material properties. An experimental procedure to obtain the matrix properties that are needed is also described. The model is implemented using the finite element method (FEM). The FEM simulations can predict the classic kink band failure seen in pre–preg-based and textile composites. In addition, an envelope fatigue loading approach is utilized to model the fatigue cycle. Using the combination of matrix fatigue degradation and the fatigue loading method, it is possible to numerically predict the S-N curve, based on the failure mechanics.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-02-24T10:23:42Z
      DOI: 10.1177/07316844211066636
       
  • Biocomposites based on natural fibers and polymers: A review on properties
           and potential applications

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      Authors: Mahmuda Akter, Md Haris Uddin, Imana Shahrin Tania
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      The growing awareness of socioeconomic and environmental issues and the high percentage of petroleum resources consumed and new environmental regulations have fueled efforts to develop innovative, cutting-edge, environmentally friendly materials with a wide range of applications. Due to environmental and sustainability concerns, the advancement of biocomposites has resulted in tremendous breakthroughs in green materials in this century. Their primary goal is to replace current synthetic petroleum-based composites with natural resources. Materials derived from nonrenewable petroleum-based sources are hazardous and expensive to produce; on the other hand, biocomposites derived from natural sources are biodegradable, recyclable, non-abrasive, and compostable and have properties comparable to synthetic fiber composites. Natural fibers are low-cost, lightweight, biodegradable, renewable, and environmentally friendly alternatives to synthetic fibers like glass and carbon fiber. The long-term viability of natural fiber-based composite materials has led to increased use in various production industries. However, the manufacturing process of natural fiber-based biocomposites is still plagued by some difficulties, such as poor adhesive propensity, moisture absorption, poor fire resistance, low impact strength, and low durability. This review provides a panoramic view to provide insight into different aspects of biocomposites based on natural fibers and polymers in terms of properties and applications, which will pave the way for future biocomposites research in academic and commercial contexts.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-02-23T07:01:09Z
      DOI: 10.1177/07316844211070609
       
  • Strain rate-dependent crash simulation of woven glass fabric thermoplastic
           composites

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      Authors: Bilal Ahmad, Xiangfan Fang
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      Woven fabric thermoplastic composites possess high specific strength and stiffness along with thermoformability. To utilize the full potential of these materials to achieve better crash-safe designs in automotive structural parts, their crash behavior must be predicted accurately. For reliable crash simulations, strain rate-dependent material data and equally capable material modeling are required. In this study, quasi-static and high-speed tests are carried out to measure tensile and in-plane shear properties. A strain rate-dependent continuum damage mechanics model is formulated to describe the deformation and damage behavior of woven glass fabric composites. Tensile and in-plane shear tests on a lab scale are used to calibrate the material parameters of the model. The model was implemented as a user-defined material subroutine (VUMAT) for Abaqus. Experimental results from coupon tests were used to verify the results of a single-element simulation. Finally, a structural level dynamic crash test of a u-profile on a drop tower was used to validate the predictions of the user material model.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-02-17T09:35:02Z
      DOI: 10.1177/07316844211064235
       
  • Assessment of cure cycle shortening for advanced composites via
           ultrasonics and dynamic mechanical analysis

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      Authors: Elie Mahfoud, Mohammad Harb
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      Composite materials are incorporated in various applications and their industry is widely growing. They offer cost savings and are more environmentally friendly than conventional metal structures. Some of the concerns this industry faces are the energy and time spent on long curing cycles to achieve permanent bonding between the matrix and fibers. In our previous work, a reusable sensing polytetrafluoroethylene (PTFE) system that can monitor the degree of cure of the composite while curing was developed and tested through Lamb waves analysis. This thin film is now used to monitor the same cure parameters for a shorter curing cycle than that suggested by the CFRP manufacturer. The results show that the three cure parameters: Minimum viscosity, full gelation, and vitrification are offset by the same time deducted from the cycle, highlighting the feasibility of using such technology. To verify the viability of this approach, tensile testing and dynamic mechanical analysis are performed on these composites. Tensile testing results show that the average tensile modulus for the shortened cycle is of similar values if not slightly higher than that of the normal cycle. Dynamic mechanical analysis (DMA) results verify both previous conclusions: Time shift of cure parameters and enhanced mechanical properties of the shortened cycle.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-02-12T02:04:35Z
      DOI: 10.1177/07316844211059145
       
  • Effect of layering layout on the energy absorbance of bamboo-inspired
           tubular composites

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      Authors: Amirreza Tarafdar, Omid Razmkhah, Hamed Ahmadi, Gholamhossein Liaghat, Sahand Chitsaz Charandabi, Moslem Rezaei Faraz
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      Gradient distribution of vascular structure made the bamboo wall structure so effective which improved the load-bearing capacity of such bio-mimicked energy absorption structures and modify the crush behavior of thin-walled composite tubes. In this research, the influence of the layering design and stacking sequence on the crush behavior, failure mechanism and absorbed energy of bamboo-inspired GFRP composite tubes is assessed experimentally and numerically. Quasi-static compression tests were conducted to explore seven permutations of Coarse Woven (CW), Fine Woven (FW), and Unidirectional (UD) E/glass fiber sheets, taking into account the longitudinal vascular bundles strengthened by organic matrix. Samples were fabricated employing a modified hand laying up method by using mechanical pressure to obtain better surface finishing and interlaminar adhesion compared to conventional hand layering up methods. To evaluate the corresponding crashworthiness parameters and characterize the crushing behavior of composite tubes, quasi-static axial compressive loading was done. The numerical simulations were validated versus experiments by a commercial finite element (FE) LS-DYNA integrating material model 54. The predicted load-displacement curves and failure mechanisms of FE analysis demonstrate acceptable correlations with visual observations during experimentation. Furthermore, the parametric numerical was performed to examine the effect of different distributions of vascular bundles. The FE analysis results revealed that the crushing behavior of bio-inspired composite tubes depended substantially on layering configuration and the stacking sequence design. The outcomes showed that the combination of woven and unidirectional fibers, respectively, located in the inner layer and hoop direction provide the optimal layering configuration design in terms of crush length efficiency, crush load efficiency, Specific energy absorption, stable progressive crushing, and better manufacturing quality.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-01-21T11:06:21Z
      DOI: 10.1177/07316844211063865
       
  • Two-stage model of prepreg bonding interface formation in automated fiber
           placement process

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      Authors: Rui Xiao, Wang Wang, Jiaqi Shi, Jun Xiao
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      While Automated Fiber Placement (AFP) of thermoset matrix composites are widely used in the aviation industry, there is little conclusive research on the relationship between the physical model of bonding interface formation process and the actual bonding strength between prepreg layers formed in AFP process. Although massive amounts of experimental data on prepreg tack have been achieved from existing research, engineers are unable to use these data as a decisive criterion in choosing process parameters. In this research, a prepreg layup physical model based on reptation model and viscoelastic mechanical model is built, in which the bonding interface formation process is divided into two stages, namely, diffusion and viscous stage. Layup-peeling experiments are conducted via a special designed high-speed layup experimental platform so that practical AFP process parameters can be imitated, and a logarithmic curve of layup velocity-peeling energy under different layup pressure is achieved. The slope of the logarithmic curve and the surface morphology of the sample after peeling prove the correctness of the established model. Simultaneously, the experimental data proves that when prepreg is peeled off, the transition from the cohesive failure mode to the interface failure mode occurs at the laying speed between 100 mm/s and 200 mm/s. These results can be used as a reference for choosing AFP process parameters to realize the balance between good bonding quality and harmless separation of adjacent prepreg layers.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-01-03T11:36:15Z
      DOI: 10.1177/07316844211060247
       
  • Fibre alignment and mechanical performance of carbon fibre Sheet Moulding
           Compounds under different preform compaction

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      Authors: Biruk F Nega, Robert S Pierce, Linlin Liu, Xiaosu Yi, Xiaoling Liu
      First page: 517
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      This work investigates the effect of preform compaction on the mechanical performance and flow-induced fibre alignment of carbon fibre reinforced Sheet Moulding Compounds (SMCs). Two groups of panels have been compression moulded from reclaimed carbon fibre tows in vinyl-ester resin with low (0.5 MPa) and high (10 MPa) preform compaction pressure Additionally, a low-cost fibre orientation analysis method has been further improved in terms of reliability, and a novel flow assessment method has been developed for carbon fibre SMCs. This approach revealed greater fibre alignment with the flow direction in the lower faces of panels as a result of greater contact time with the heated mould and a lower charge viscosity at the time of pressing. As expected, greater fibre alignment in the flow direction was observed outside the initial charge coverage area in both types of panels, where the flow was greatest. Due to additional fibre flow during the high-pressure compaction stage, the mean degree of flow alignment in the high compaction panel was 47% higher than that of the low compaction panel. Improvements in the tensile stiffness (8%) and strength (32%) were also observed as a result of the high-pressure compaction stage and associated flow alignment.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-01-07T11:07:05Z
      DOI: 10.1177/07316844211066637
       
  • Green composites from natural fibers and biopolymers: A review on
           processing, properties, and applications

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      Authors: Md Zahidul Islam, Md Emdad Sarker, Md Mahbubor Rahman, Md Reajul Islam, A T M Faiz Ahmed, Md Sultan Mahmud, Md Syduzzaman
      First page: 526
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      At present, environmental sustainability is a big concern due to the limited resources and the adverse impacts of petroleum-based materials. Green composites (GCs) attracted intensive research interest for the last few decades from academicians, scientists, researchers, and practitioners both from the ecological and economic point of view and are presently being considered as one of the most promising research domains. Composites produced from renewable and/or natural resources thanks to their biodegradability and sustainability properties are envisaged as the next-generation materials to meet the growing demand worldwide. GCs are intensively investigated due to their multifunctional properties and utilization in a wide variety of fields including automobile, marine, aerospace, structural and infrastructural applications, packaging, electronics industry, sports, and biomedical applications. They also show potentials to replace the expensive as well as non-degradable petroleum-based composites. After the shelf life, it can be disposed of easily without harming the environment. The processing techniques, properties, and applications of green composites are comprehensively assessed in this review article. The feasibility of the naturally available fiber and polymers for green composites are also discussed highlighting the existing challenges with possible suggestions. It was intended to present a full overview of biodegradable polymer composites reinforced with natural fiber, as well as the necessary future directions for the concerned researchers.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-01-17T04:52:01Z
      DOI: 10.1177/07316844211058708
       
  • Forming and layering method optimization of prestressed joint of
           composite-metal drive shaft

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      Authors: Yang Jiao, Yong Li, Dajun Huan, Hongquan Liu, Rui Luo, Junsheng Wang
      First page: 558
      Abstract: Journal of Reinforced Plastics and Composites, Ahead of Print.
      Prestressed fit is a new type of composite and metal connection. Compared with the traditional connection, it has the advantages of maintaining fiber continuity, high controllability, and high stability. According to the analytical model, the important parameters of the prestressed joint such as friction coefficient, lap length and winding tension are proposed. The influence of the parameters on the joint performance and stress distribution is studied by the finite element method. The abnormal end phenomenon, the stress relaxation phenomenon, and the stress mutation phenomenon caused by demolding during the joint forming process are explained, and the design of the layering method is optimized. The results show that the end effect makes the relationship between the lap length and the peak torque of the joint nonlinear, and increasing the lap length is beneficial to reduce this effect; before and after demolding, the end stress increases sharply; reducing the winding tension and selecting high modulus core mold materials are conducive to reducing stress relaxation; 90°inner ply angle and ± 45°outer ply angle are ideal layup methods for joint composite materials.
      Citation: Journal of Reinforced Plastics and Composites
      PubDate: 2022-01-17T05:21:48Z
      DOI: 10.1177/07316844211065062
       
 
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