Subjects -> ENGINEERING (Total: 2688 journals)
    - CHEMICAL ENGINEERING (229 journals)
    - CIVIL ENGINEERING (237 journals)
    - ELECTRICAL ENGINEERING (176 journals)
    - ENGINEERING (1325 journals)
    - ENGINEERING MECHANICS AND MATERIALS (452 journals)
    - HYDRAULIC ENGINEERING (56 journals)
    - INDUSTRIAL ENGINEERING (98 journals)
    - MECHANICAL ENGINEERING (115 journals)

ENGINEERING (1325 journals)            First | 1 2 3 4 5 6 7 | Last

Showing 201 - 400 of 1205 Journals sorted alphabetically
Concurrent Engineering     Hybrid Journal   (Followers: 3)
Continuum Mechanics and Thermodynamics     Hybrid Journal   (Followers: 8)
Control Engineering Practice     Hybrid Journal   (Followers: 46)
Control Theory and Informatics     Open Access   (Followers: 9)
Corrosion Science     Hybrid Journal   (Followers: 23)
CT&F - Ciencia, Tecnología y Futuro     Open Access  
CTheory     Open Access  
Current Applied Physics     Full-text available via subscription   (Followers: 4)
Current Applied Science and Technology     Open Access  
Current Journal of Applied Science and Technology     Open Access  
Current Research in Nanotechnology     Open Access   (Followers: 23)
Current Science     Open Access   (Followers: 115)
Dams and Reservoirs     Hybrid Journal   (Followers: 3)
Data-Centric Engineering     Open Access  
Decision Making : Applications in Management and Engineering     Open Access   (Followers: 1)
Design Journal : An International Journal for All Aspects of Design     Hybrid Journal   (Followers: 33)
Designed Monomers and Polymers     Open Access   (Followers: 1)
Designs     Open Access  
Designs, Codes and Cryptography     Hybrid Journal   (Followers: 7)
Development Engineering     Open Access   (Followers: 3)
Diálogos Interdisciplinares     Open Access  
Diffusion Foundations     Full-text available via subscription   (Followers: 4)
Digital Signal Processing     Hybrid Journal   (Followers: 34)
Dinamisia : Jurnal Pengabdian Kepada Masyarakat     Open Access  
Discrete Optimization     Full-text available via subscription   (Followers: 7)
Dokuz Eylül Üniversitesi Denizcilik Fakültesi Dergisi     Open Access  
Düzce Üniversitesi Bilim ve Teknoloji Dergisi / Duzce University Journal of Science & Technology     Open Access  
Dyes and Pigments     Hybrid Journal   (Followers: 1)
Dynamical Systems : An International Journal     Hybrid Journal  
E&S Engineering and Science     Open Access  
e-Phaïstos : Revue d’histoire des techniques / Journal of the history of technology     Open Access  
EAU Heritage Journal Science and Technology     Open Access   (Followers: 1)
El-Cezeri Fen ve Mühendislik Dergisi / El-Cezeri Journal of Science and Engineering     Open Access  
Electromagnetics     Hybrid Journal   (Followers: 13)
Electrophoresis     Hybrid Journal   (Followers: 18)
Elkawnie : Journal of Islamic Science and Technology     Open Access  
Emerging Science Journal     Open Access   (Followers: 1)
Emitter : International Journal of Engineering Technology     Open Access  
ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations     Open Access  
Energies     Open Access   (Followers: 4)
Energy and Power Engineering     Open Access   (Followers: 23)
Energy Conversion and Management     Hybrid Journal   (Followers: 15)
Energy Conversion and Management : X     Open Access   (Followers: 1)
Energy Engineering     Full-text available via subscription   (Followers: 8)
Energy for Sustainable Development     Hybrid Journal   (Followers: 13)
Energy Science & Engineering     Open Access   (Followers: 6)
Energy Science and Technology     Open Access   (Followers: 10)
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects     Hybrid Journal   (Followers: 1)
Energy Sources, Part B: Economics, Planning, and Policy     Hybrid Journal   (Followers: 7)
Energy Systems     Hybrid Journal   (Followers: 11)
EnergyChem     Hybrid Journal   (Followers: 1)
Engenharia de Interesse Social     Open Access  
ENGEVISTA     Open Access  
Engineer : Journal of the Institution of Engineers, Sri Lanka     Open Access  
Engineering     Open Access   (Followers: 1)
Engineering & Technology     Hybrid Journal   (Followers: 22)
Engineering Analysis with Boundary Elements     Hybrid Journal   (Followers: 2)
Engineering Computations     Hybrid Journal   (Followers: 3)
Engineering Economics     Open Access   (Followers: 4)
Engineering Economist, The     Hybrid Journal   (Followers: 4)
Engineering Failure Analysis     Hybrid Journal   (Followers: 68)
Engineering Geology     Hybrid Journal   (Followers: 16)
Engineering Journal of Research and Development     Open Access  
Engineering Management in Production and Services     Open Access  
Engineering Management Research     Open Access   (Followers: 6)
Engineering Optimization     Hybrid Journal   (Followers: 19)
Engineering Reports     Open Access  
Engineering Science and Technology, an International Journal     Open Access   (Followers: 1)
Engineering Sciences     Open Access  
Engineering Studies     Hybrid Journal   (Followers: 1)
Engineering With Computers     Hybrid Journal   (Followers: 5)
Engineering, Technology & Applied Science Research     Open Access   (Followers: 1)
ENP Engineering Science Journal     Open Access  
Entramado     Open Access  
Entre Ciencia e Ingeniería     Open Access  
Entropy     Open Access   (Followers: 5)
Environmental & Engineering Geoscience     Full-text available via subscription   (Followers: 5)
Environmental and Ecological Statistics     Hybrid Journal   (Followers: 7)
Environmetrics     Hybrid Journal  
Épités - Épitészettudomány     Full-text available via subscription   (Followers: 1)
EPJ Photovoltaics     Open Access   (Followers: 2)
Ergonomics in Design: The Quarterly of Human Factors Applications     Hybrid Journal   (Followers: 21)
ESAIM: Control Optimisation and Calculus of Variations     Open Access   (Followers: 2)
ESAIM: Mathematical Modelling and Numerical Analysis     Open Access   (Followers: 5)
ESAIM: Proceedings     Open Access  
eScience     Open Access   (Followers: 1)
Estuaries and Coasts     Hybrid Journal   (Followers: 22)
EUREKA : Physics and Engineering     Open Access  
Euro-Mediterranean Journal for Environmental Integration     Hybrid Journal  
European Journal of Combinatorics     Full-text available via subscription   (Followers: 3)
European Journal of Engineering Education     Hybrid Journal   (Followers: 9)
European Journal of Lipid Science and Technology     Hybrid Journal   (Followers: 1)
European Journal of Mass Spectrometry     Hybrid Journal   (Followers: 16)
European Physical Journal - Applied Physics     Full-text available via subscription   (Followers: 19)
European Transport Research Review     Open Access   (Followers: 22)
Evolutionary Intelligence     Hybrid Journal   (Followers: 2)
Evolving Systems     Hybrid Journal  
Experimental and Computational Multiphase Flow     Hybrid Journal  
Experimental Techniques     Hybrid Journal   (Followers: 51)
Experiments in Fluids     Hybrid Journal   (Followers: 17)
Farm Engineering and Automation Technology Journal     Open Access  
Fibers and Polymers     Full-text available via subscription   (Followers: 4)
FIGEMPA : Investigación y Desarrollo     Open Access   (Followers: 1)
Filtration & Separation     Full-text available via subscription   (Followers: 4)
Finite Fields and Their Applications     Full-text available via subscription   (Followers: 5)
Fırat University Turkish Journal of Science & Technology     Open Access  
Fire Science Reviews     Open Access   (Followers: 12)
Flexible Services and Manufacturing Journal     Hybrid Journal   (Followers: 2)
Flow, Turbulence and Combustion     Hybrid Journal   (Followers: 30)
Fluid Dynamics     Hybrid Journal   (Followers: 27)
Fluid Phase Equilibria     Hybrid Journal   (Followers: 4)
Focus on Catalysts     Full-text available via subscription  
Focus on Pigments     Full-text available via subscription   (Followers: 3)
Focus on Powder Coatings     Full-text available via subscription   (Followers: 5)
Focus on Surfactants     Full-text available via subscription   (Followers: 2)
Food Engineering Reviews     Hybrid Journal   (Followers: 2)
Food Science and Technology     Open Access   (Followers: 2)
Forces in Mechanics     Open Access   (Followers: 2)
Formación Universitaria     Open Access   (Followers: 4)
FORMakademisk - forskningstidsskrift for design og designdidaktikk     Open Access   (Followers: 2)
Formal Methods in System Design     Hybrid Journal   (Followers: 6)
Forschung     Hybrid Journal   (Followers: 1)
Forschung im Ingenieurwesen     Hybrid Journal  
Foundations and Trends in Systems and Control     Full-text available via subscription   (Followers: 4)
Foundations and Trends® in Communications and Information Theory     Full-text available via subscription   (Followers: 6)
Foundations and Trends® in Electronic Design Automation     Full-text available via subscription   (Followers: 1)
Foundations of Science     Hybrid Journal   (Followers: 1)
Frontiers in Aerospace Engineering     Open Access   (Followers: 20)
Frontiers in Energy     Hybrid Journal   (Followers: 4)
Frontiers in Nanotechnology     Open Access   (Followers: 1)
Frontiers of Environmental Science & Engineering     Hybrid Journal   (Followers: 3)
Fuel and Energy Abstracts     Full-text available via subscription   (Followers: 7)
Fuel Cells     Hybrid Journal   (Followers: 8)
Fuel Cells Bulletin     Full-text available via subscription   (Followers: 9)
Fusion Engineering and Design     Hybrid Journal   (Followers: 6)
Fuzzy Information and Engineering     Open Access   (Followers: 2)
Fuzzy Sets and Systems     Hybrid Journal   (Followers: 3)
Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards     Hybrid Journal   (Followers: 8)
Géotechnique     Hybrid Journal   (Followers: 27)
Geothermics     Hybrid Journal   (Followers: 7)
Glass Technology - European Journal of Glass Science and Technology Part A     Full-text available via subscription   (Followers: 1)
Global Journal of Engineering Research     Full-text available via subscription  
Global Transitions Proceedings     Open Access  
GPS Solutions     Hybrid Journal   (Followers: 28)
Graphs and Combinatorics     Hybrid Journal   (Followers: 4)
Grass and Forage Science     Hybrid Journal   (Followers: 4)
Groundwater for Sustainable Development     Full-text available via subscription   (Followers: 5)
Heat Transfer - Asian Research     Hybrid Journal   (Followers: 10)
Heat Transfer Engineering     Hybrid Journal   (Followers: 36)
Heat Treatment and Surface Engineering     Open Access  
High Voltage     Open Access  
Himalayan Journal of Science and Technology     Open Access  
Historical Records of Australian Science     Hybrid Journal   (Followers: 2)
Human Behavior and Emerging Technologies     Hybrid Journal   (Followers: 1)
Human Factors in Ergonomics & Manufacturing     Hybrid Journal   (Followers: 12)
Human-Intelligent Systems Integration     Hybrid Journal  
I+D Revista de Investigaciones     Open Access  
IBM Journal of Research and Development     Hybrid Journal   (Followers: 16)
IEEE Antennas and Propagation Magazine     Hybrid Journal   (Followers: 112)
IEEE Antennas and Wireless Propagation Letters     Hybrid Journal   (Followers: 88)
IEEE Communications Magazine     Full-text available via subscription   (Followers: 139)
IEEE Embedded Systems Letters     Hybrid Journal   (Followers: 60)
IEEE Engineering Management Review     Full-text available via subscription   (Followers: 117)
IEEE Geoscience and Remote Sensing Letters     Hybrid Journal   (Followers: 150)
IEEE Geoscience and Remote Sensing Magazine     Hybrid Journal   (Followers: 6)
IEEE Industry Applications Magazine     Full-text available via subscription   (Followers: 82)
IEEE Instrumentation & Measurement Magazine     Hybrid Journal   (Followers: 148)
IEEE Journal of Biomedical and Health Informatics     Hybrid Journal   (Followers: 14)
IEEE Journal of Oceanic Engineering     Hybrid Journal   (Followers: 11)
IEEE Journal of Selected Topics in Quantum Electronics     Hybrid Journal   (Followers: 7)
IEEE Journal of Selected Topics in Signal Processing     Hybrid Journal   (Followers: 43)
IEEE Journal of Solid-State Circuits     Full-text available via subscription   (Followers: 24)
IEEE Journal on Selected Areas in Communications     Hybrid Journal   (Followers: 39)
IEEE Latin America Transactions     Full-text available via subscription   (Followers: 2)
IEEE Magnetics Letters     Hybrid Journal   (Followers: 7)
IEEE Microwave and Wireless Components Letters     Hybrid Journal   (Followers: 35)
IEEE Microwave Magazine     Full-text available via subscription   (Followers: 63)
IEEE Nanotechnology Magazine     Hybrid Journal   (Followers: 45)
IEEE Open Journal of Engineering in Medicine and Biology     Open Access   (Followers: 1)
IEEE Open Journal of Nanotechnology     Open Access   (Followers: 1)
IEEE Potentials     Full-text available via subscription   (Followers: 42)
IEEE Reviews in Biomedical Engineering     Hybrid Journal   (Followers: 19)
IEEE Signal Processing Letters     Hybrid Journal   (Followers: 60)
IEEE Solid-State Circuits Magazine     Hybrid Journal   (Followers: 11)
IEEE Spectrum     Full-text available via subscription   (Followers: 219)
IEEE Technology and Society Magazine     Full-text available via subscription   (Followers: 8)
IEEE Transactions on Advanced Packaging     Full-text available via subscription   (Followers: 8)
IEEE Transactions on Antennas and Propagation     Full-text available via subscription   (Followers: 79)
IEEE Transactions on Applied Superconductivity     Hybrid Journal   (Followers: 5)
IEEE Transactions on Automation Science and Engineering     Full-text available via subscription   (Followers: 13)
IEEE Transactions on Autonomous Mental Development     Hybrid Journal   (Followers: 8)
IEEE Transactions on Biomedical Engineering     Hybrid Journal   (Followers: 35)
IEEE Transactions on Broadcasting     Hybrid Journal   (Followers: 11)
IEEE Transactions on Circuits and Systems II: Express Briefs     Hybrid Journal   (Followers: 20)
IEEE Transactions on Components and Packaging Technologies     Full-text available via subscription   (Followers: 17)
IEEE Transactions on Control Systems Technology     Hybrid Journal   (Followers: 111)
IEEE Transactions on Education     Hybrid Journal   (Followers: 11)
IEEE Transactions on Electronics Packaging Manufacturing     Hybrid Journal   (Followers: 21)
IEEE Transactions on Energy Conversion     Hybrid Journal   (Followers: 16)
IEEE Transactions on Engineering Management     Hybrid Journal   (Followers: 74)

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Similar Journals
Journal Cover
Experimental Techniques
Journal Prestige (SJR): 0.296
Citation Impact (citeScore): 1
Number of Followers: 51  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 0732-8818 - ISSN (Online) 1747-1567
Published by Springer-Verlag Homepage  [2469 journals]
  • Correction: Investigation of High Temperature Performance and Viscosity
           Characteristics of Modified and Unmodified Color Asphalt

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      PubDate: 2022-06-01
       
  • Correction to: Effect of Anodizing Process on Inter Laminar Shear Strength
           of GLARE Composite through T-Peel Test: Experimental and Numerical
           Approach

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      Abstract: A Correction to this paper has been published: https://doi.org/10.1007/s40799-021-00450-8
      PubDate: 2022-06-01
       
  • Circular Tracking Performance of a Flexure-Based Micro-Motion Stage

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      Abstract: Abstract This paper presents the circular tracking performance of a flexure-based micro-motion stage. The mechanical design and prototype development are first illustrated. A double closed-loop control strategy, including the inner and outer feedback controllers, is then employed. Subsequently, main factors affecting its circular tracking performance are further analyzed. Experimental results show that the actual circular trajectory can be enlarged by increasing KP and KI. The circular tracking performance is improved when the sampling period decreases within a certain range. By contrast, it deteriorates as the amplitudes of input sinusoid signals increase. In addition, tracking errors cannot be decreased through exchanging input signals. It demonstrates that there are four parts in a certain cycle where the circular tracking performance is poor. The reason is that these parts are peak and valley points of input signals, and they are influenced by dynamic characteristics of this stage.
      PubDate: 2022-06-01
       
  • J-integral Analysis of the Simulated Heat-affected Zone of the
           Elevated-temperature Martensitic Steel

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      Abstract: Abstract Due to its superior strength at high temperatures P/T91 steel is often applied in the chemical, petrochemical and fossil-fired power generation industries. The high strength is achieved by a suitable martensitic microstructure after appropriate heat treatment procedure. Welding is the most important process of joining the components in such plants, and the heat-affected zone is often the weakest part of these structures. Having in mind that the welded joint is the weakest area, it is necessary to know its properties and assess the level of its degradation. It was found that the life-limiting factor in case of P/T91 steel welded structures are the cracks located in the heat affected zones, more precisely in its intercritical region. In present paper the results of the fracture toughness measurement carried out on simulated P91 steel ICHAZ specimens produced using a weld simulator has been presented. The tests were done on two types of simulated specimens, those subjected to the subsequent PWHT and with those left untreated (without PWHT), at room temperature and 600 °C. For the J-integral estimation pin-loaded SEN(T) specimens were tested in plane stress conditions using the unloading compliance method of deriving a single specimen resistance curve and the η-method.
      PubDate: 2022-06-01
       
  • Investigation of the Transiting Test Method for the Aerodynamic
           Performance of Vertical Axis Wind Turbine Using Wind Generated by a Moving
           Vehicle

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      Abstract: Abstract With the continuous consumption of fossil energy, environmental pollution problems have become increasingly prominent, and clean energy forms, such as wind energy, have become the focus of research in various countries. The main form of wind energy utilization is wind turbines. However, the single wind tunnel experiment method limits the experimental research on wind turbine aerodynamic performance. The proposed transiting test method using wind generated by a moving vehicle to test the aerodynamic performance of a vertical axis wind turbine (VAWT), provides a new idea for experimental research. This study uses the transiting test method to investigate the static torque and power coefficients of VAWT. Results show that under the limited conditions of the transiting test, the static torque coefficient of VAWT measured by the transiting test coincides with the wind tunnel test measurement results. The error between the static torque coefficient and the wind tunnel test results is basically less than 15%, and the error is within a reasonable range. The power coefficient of VAWT obtained through the transiting test is similar to previous research results, and the error from the wind tunnel test result is within an acceptable range. The transiting test can reproduce the research results of VAWT in the wind tunnel test and can meet the needs of the aerodynamic performance research of VAWT, which is a novel test approach for research on the aerodynamic performance of VAWT.
      PubDate: 2022-06-01
       
  • Development of an Integrated Load Testing Device for a Substructure Hybrid
           Test of a Curved Bridge

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      Abstract: Abstract A substructure hybrid test is an effective approach to reproduce the seismic behavior of engineering structures. The structure is partitioned into several substructures; those with complex behavior are analyzed experimentally, whereas the others are analyzed numerically, combining the merits of physical experiments and numerical simulations. Previous studies often loaded physical substructures in two or three translational directions. Simultaneous rotational loading in three Cartesian axes is difficult because the load testing device has to be configured spatially, resulting in control problems due to strong coupling. Special expertise in mechanical engineering is necessary to solve this problem. To this end, this study proposes an integrated load testing device suitable for physical loading in all six degrees-of-freedom simultaneously. The device is based on a Stewart platform and can provide a large axial force required by most gravity-bearing components. It also has a large inherent stiffness necessary to obtain the force-displacement curve from damage through complete failure. This paper describes the force-displacement mixed control based on the Stewart configuration, which is necessary for testing engineering structures. Control software is developed and interfaced with the mid-ware OpenFresco to coordinate the numerical substructure. A hybrid test is conducted using a small-scale, electronic-driven load testing device. The test ran smoothly without any malfunctions, demonstrating the excellent performance of the testing system.
      PubDate: 2022-06-01
       
  • Low-cost Solutions for Velocimetry in Rotating and Opaque Fluid
           Experiments using Ultrasonic Time of Flight

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      Abstract: Abstract Many common techniques for flow measurement, such as Particle Image Velocimetry (PIV) or Ultrasonic Doppler Velocimetry (UDV), rely on the presence of reflectors in the fluid. These methods fail to operate when e.g centrifugal or gravitational acceleration leads to a rarefaction of scatterers in the fluid, as for instance in rapidly rotating experiments. In this article we present two low-cost implementations for flow measurement based on the transit time (or Time of Flight) of acoustic waves, that do not require the presence of scatterers in the fluid. We compare our two implementations against UDV in a well controlled experiment with a simple oscillating flow and show we can achieve measurements in the sub-centimeter per second velocity range with an accuracy of \(\sim 5-10\%\) . We also perform measurements in a rotating experiment with a complex flow structure from which we extract the mean zonal flow, which is in good agreement with theoretical predictions.
      PubDate: 2022-06-01
       
  • Multi-Level Stator Winding Failure Analysis on the Insulation Material for
           Industrial Induction Motor

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      Abstract: Abstract Multi-level stator winding failure investigation on the insulation material for industrial induction motor at its incipient stage can achieve tremendous energy savings, minimize maintenance costs, and enhance the operational life. Early detection has the main advantage of preventing motor failure, which gradually leads to catastrophic or complete shutdown. In this paper, the multi-level stator winding failure of an industrial induction motor in the numerical model was designed and implemented using Finite-Element Analysis (FEA). Since multi-level stator winding failure constitutes substantial time and frequency domains, the signature from the motor is analysed employing a time-frequency-based technique using wavelets. Early detection of the multi-level stator winding failures uses signatures from the experimental setup of both healthy and faulty motors by combining both modular and virtual instruments. FEA results were then validated under the same operating conditions using an experimental setup. It has been observed that the results obtained from the FEA are in good agreement with the experimental setup. The frequency component variation in the sensor frequency response for fault conditions at various severity levels suggests multiple frequency bands. When the motor was under the influence of a 50% stator turn-turn fault, a similar frequency band between 700-800 Hz was observed. As a result, the proposed research was accurate, with a correlation factor of 0.96.
      PubDate: 2022-06-01
       
  • A Lightweight DFT-Based Approach to the Optical Measurement of
           Displacements Using an Open-Source Python Code

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      Abstract: Abstract Commonly available digital image correlation (DIC) tools are designed to evaluate displacement/deformation fields using well-optimized correlation functions and computational procedures. However, real-time monitoring at high sampling rates or tracking motion at predefined locations from large sequence images can be hardly accomplished due to extreme computational costs. As shown in this paper, a lightweight approach based on the registration of subpixel subset shifts using discrete Fourier transform (DFT) can easily tackle large sets of images if the measurement is limited to discrete locations. A simple open-source python software designed for evaluation of displacements using virtual extensometers is described in this paper, along with the analysis of its performance. It is shown that the DFT-based algorithms outperform a commonly used DIC package in terms of computational efficiency and required user interactions, without sacrificing precision and accuracy.
      PubDate: 2022-06-01
       
  • The Effect of Load Phase Angle on Roof Components of Electric Driven Bus
           Fatigue Damage

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      Abstract: Abstract In this study, the effect of phase shift under multiaxial excitation on fatigue damage was investigated for the roof components of electrical driven bus. The experiments were performed using a servo-hydraulic controlled multiaxial shaker. Firstly, phase degree and concurrence of servo-hydraulic actuators were calculated and compared for in-phase and out-of-phase loading cases. Following response signals of both loadings were acquired to investigate the dynamic response of the structure and roof components. Both test loadings were compared by level crossing counting and damage calculations in the frequency domain. The results indicate that the out-of-phase loading can reduce the acceleration and strain values on the flaps induced damage significantly compared to in-phase loading. Furthermore, the out-of-phase loading of bench testing corresponds well to the experimental results of rough road, which represent customer drive conditions.
      PubDate: 2022-06-01
       
  • Dynamic Characteristics Monitoring Changes of Damaged and Retrofitted RC
           Buildings

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      Abstract: Abstract This paper presents results of an experimental study that focuses on monitoring changes in dynamic characteristics of a damaged and retrofitted two-story reinforced concrete (RC) building model with poor detailing. In the study, ambient vibration tests are performed via four test setup protocols in order to monitor changes in dynamic characteristics before and after such setups. The four main test setups are: (i) undamaged (as-built) case (Setup # 1), (ii) damaged cases with different degrees of damages (Setup # 2), (iii) repaired case with different types of repair methods (Setup # 3), and (iv) strengthened case with externally bonded CFRP composite laminates (Setup # 4). In addition, a total of eight ambient vibration tests are conducted in order to assess the effects of degree of damage and associated retrofit systems on building’s dynamic characteristics such as natural frequencies, mode shapes, and damping ratios. The Stochastic Subspace Identification (SSI) Method is used to identify the dynamic characteristics. Experimentally identified dynamic characteristics obtained from all setups are compared with each other in order to detect the effect of damage and repair applications on the structure’s dynamic characteristics. Moreover, Modal Assurance Criterion (MAC) and Coordinate Modal Assurance Criterion (COMAC) are determined to examine the changes of stiffness of each RC building model.
      PubDate: 2022-06-01
       
  • Analysis of Out-of-Plane Hail Impact Resistance of Steel Roof Panels

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      Abstract: Abstract Residential and commercial buildings often use metal roof panels. In contrast, the dent resistance of steel panel subjected to impact of hailstone is insufficiently studied. The analysis of the whole experimental setup has been carried out using a finite element model (FEM). Artificial hailstones were launched at different steel sheets based on their size at different terminal velocities for comparison with natural hailstones that remained intact after impact. Based on comparisons between experimental results and the FE model, the simulation approach and material properties are evaluated. Additionally, an equation to predict dent depth using kinetic energy and stress is presented. The results of this study provide an understanding of both hail and roof panel failure modes and their effect on dent resistance. Experimental observations and numerical simulations in this study were well matched with results obtained using analytical models. In addition, the proposed equation overestimates dent depths compared with those found in the tested steel sheets, while underestimating the ones determined by finite element models.
      PubDate: 2022-06-01
       
  • Numerical Simulations of Modal Tests on Yingzhou Bridge Using a Passing
           Vehicle as the Excitation

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      Abstract: Abstract Modal tests using ambient excitations might lead to inaccurate results for bridges with the fundamental natural frequencies greater than 1 Hz. Modal tests using passing vehicles as the excitations are proposed for use in this regard. For effective modal tests using passing vehicles as the excitations to take place on full-scale arch bridges, two matters of science should be clarified, i.e., the effects of the measuring point placement and the influences of the vehicle excitation parameters (the vehicle speed and the vehicle weight). In this article, thorough studies are given to the two scientific issues based on the numerical simulations of modal tests on Yingzhou Bridge (a 120 m-span special-shaped steel arch bridge). It is found that both the accelerometer placement based on the genetic algorithm and the vehicle excitation parameters selected using the response surface method can help experiment personnel get more accurate modal test results. Therefore, the field modal test carried out on Yingzhou Bridge employs optimized accelerometer arrangement and vehicle excitation parameters. It is found that the modal parameters measured on the full-scale Yingzhou Bridge agree well with the results calculated by modal analysis.
      PubDate: 2022-06-01
       
  • Creep and Hysteresis Testing of Unfilled Natural Rubber Using
           Scanner-based Digital Image Correlation

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      Abstract: Abstract The conventional digital image correlation (DIC) method is not readily applicable for testing creep and hysteresis in high strain polymeric materials at temperatures above room conditions due to the limited field-of-view of the camera and the difficulty associated with heating the specimen during loading. In this work, the previously developed scanner-based digital correlation (SB-DIC) method for in-plane displacement and strain measurement was extended to investigate creep and hysteresis in unfilled natural rubber at temperatures up to 65 °C. An enclosed loading rig was designed to load the rubber specimens both mechanically and thermally. Two cylindrical quartz heaters were used to apply constant heat to the rubber specimen at controlled temperatures during loading. Speckle patterns on the specimens were created artificially and images were acquired by scanning using a flatbed scanner at regular time intervals. The zero-normalized cross correlation criterion in the DIC algorithm was used to map strains up to 400 % due to creep and hysteresis. A series of creep experiments from 25 to 65 °C and hysteresis experiments from 25 to 55 °C were carried out to investigate the effect of temperature on creep and hysteresis in rubber. The full-field displacement vectors showed a rapid increase in creep strain above 35 °C. The hysteresis loops were also found to increase with temperature.
      PubDate: 2022-06-01
       
  • Design of a Shake Table with Moderate Cost

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      Abstract: Abstract Shake table testing is a very efficient tool in earthquake engineering that may be used to enhance construction methods and the overall safety of structures. Shake tables permit investigation of the dynamic behaviour of civil engineering structures. This paper details the development of a uniaxial shake table that was designed and built with the objective of limiting its cost to a moderate amount, bellow 250 k€. The technical specifications of the shake table are presented as well as the evaluation of its performance and its validation. It is shown that it is possible to build an operational shake table capable of generating real seismic motion for the assessment of structural behaviour at a moderate cost.
      PubDate: 2022-06-01
       
  • Experimental Stress Analysis of Spherical Roller Bearing for High-Speed
           Trains Using Photoelasticity

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      Abstract: Most studies on bearing stress analysis have considered single row rolling elements. In this study, the stress behavior of a spherical roller bearing with two rows of rolling elements is investigated. Photoelastic experimental hybrid method, is applied to investigate the interior and contact stresses of high-speed train bearings under combined axial and radial loads. The experimental results show that the bearing under investigation has the capability of sustaining high loads. The sharing of the loads between the two rows of rollers was found to contribute to excellent load bearing capabilities. It is also shown that the barrel-shaped roller has an influence on the stress concentrations and their distributions on the bearing races. At low radial and axial loads, the stresses on the races result from the bulging out section of the roller. As load is increased, the roller deforms and race stress occur at the ends of the roller, which now act like a punch. Only half of the bearing structure was found to be highly stressed. At position 3, the few isochromatic fringes on rollers and inner race shows that low stress concentrations occur on them. A comparison of the results from spherical roller bearing (SRB) and tapered roller bearing (TRB) showed that the stresses induced at the bearing races of the TRB bearing have higher magnitudes than those of SRB. This observation can be attributed to the two rows of rollers in SRB. High stress concentrations often lead to crack initiation and spall growth. Therefore, the low stresses on the SRB makes them more suitable for applications involving heavy loads.
      PubDate: 2022-05-13
       
  • Characterising Multiaxial Fatigue Random Strain Time Domain in Assessing
           the Durability of a Suspension Coil Spring

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      Abstract: The aim of this study is to characterise the fatigue life data of multiaxial strain signals of an automobile suspension coil spring under various road load condition. The automobile coil spring experiences cyclic load due to the variation of road conditions, resulting in compression-tension loads, and providing a direct shear force and a torsion in the coil spring’s internal tension. Currently, the uniaxial analysis overestimates the component’s fatigue life because the uniaxial fatigue excludes complex stress and strain states relating to the fatigue life. Therefore, multiaxial analysis was proposed in order to determine the variance in the magnitude of main stress effects. The critical or hotspot region of a quarter car model was determined using finite element analysis. The rosette strain gauge was located at the critical region in order to capture the maximum strain signals on various roads, i.e. highway, rural and campus road during data measurement analysis in time-domain. Global statistic features of kurtosis and root mean square were analysed to obtain random signals classification. Brown-Miller, Fatemi–Socie, and Wang-Brown models were proposed to predict the multiaxial fatigue life where these models include strain criteria. Multiaxial fatigue models were proposed when evaluating fatigue life due to the complex geometries and torsional effect on coil spring. The results indicated that multiaxial strain life from Brown-Miller model possessed the highest fatigue lives. Probability distribution function for fatigue lives from Brown-Miller, Fatemi–Socie and Wang-Brown model is plotted to characterise the distribution of fatigue lives under the time domain. In order to determine the acceptability of the data, the conservative fatigue life 1:2 and 2:1 data scattering approach is proposed. Hence, the proposed life models can be used to characterise multiaxial fatigue under random strain signals for the automobile coil spring.
      PubDate: 2022-05-09
       
  • Study on Cutting Force and Surface Topography of Peripheral Milling CFRP

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      Abstract: Abstract When constant parameters are used for peripheral milling CFRP, it is difficult to meet the requirement of high quality, so variable parameters machining is proposed. First, the response surface method was used to explore the effect of changing cutting conditions on the interaction of spindle speed, cutting depth and feed speed on radial force. The surface topography and roughness after the test were observed and analyzed. The results show that defects are more likely to occur at the entrance and the exit area than the central area. Taking the minimum radial force as the experimental goal, the optimal parameters combination was obtained and used for finite element and experimental verification. Second, the variable parameters milling were used the cemented carbide tool and PCD tool. The radial force, surface topography and roughness were analyzed and the optimized variable parameters combination was obtained. The results show that the high spindle speed, low feed speed and low cutting depth are beneficial to improve the surface quality at the entrance and the exit area when the machining parameters at the centra area remain unchanged. Meanwhile, when the parameters change abruptly, the fluctuation of the radial force at the variable parameters area is decreased. The variable parameters compared to constant parameters, the surface roughness of the machining with the cemented carbide tool at the entrance area by 29.7% and 7.4%, respectively and the machining with PCD tool at the exit and the entrance area decreased by 60.5%, 43.5% and 38.8%, 51.9%, respectively. Compared with the cemented carbide tool, the radial force of the PCD tool is more stable and the surface quality is further improved.
      PubDate: 2022-05-03
       
  • Multi-Axis 3D Printing Defect Detecting by Machine Vision with
           Convolutional Neural Networks

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      Abstract: Abstract Part quality inspection is playing a critical role in Fused Deposition Modeling (FDM). It produces a part quality analysis report which can be adopted to further improve the overall part quality. However, the part quality inspection process puts heavy reliance on the engineer’s background and experience. This manual process suffers from both low efficiency and potential errors. The purpose of the paper is to look into a deep neural network towards a robust method for montoring of 3D priting Parts. However, there is little research on the detection of multi-axis FDM printing. Aiming at FDM printing defects, an offline detection method of multi-axis FDM printing based on machine vision and convolutional neural network (CNN) is proposed. The CCD (Charge Coupled Device) camera is used to capture the current layer, and the self-constructed CNN network is used to classify the defects. The interlayer stripping defect is taken as an example to verify the detection method’s feasibility. The data set of the defect is established, used as CNN’s input. The network’s structure is continuously improved through training and testing. Finally, the CNN with excellent performance is constructed. The classification results show that the CNN network’s classification accuracy for interlayer stripping and normal state is 83.1%, the sensitivity is 85.6% and 80.5% and the ROC curve area is 0.824, which proves the feasibility of the detection method. Moreover, the method can be extended to other print defect detection. It provides a new method to ensure the quality of FDM prints.
      PubDate: 2022-04-29
       
  • Correction to: Modeling and Sensitivity Analysis of Thermal Conductivity
           of Ethylene Glycol–Water Based Nanofuids with Alumina Nanoparticles

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      PubDate: 2022-04-18
       
 
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