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 Arabian Journal for Science and Engineering   [SJR: 0.345]   [H-I: 20]   [5 followers]  Follow         Hybrid journal (It can contain Open Access articles)    ISSN (Print) 1319-8025    Published by Springer-Verlag  [2352 journals]
• A Low-Cost and Lightweight Alternative to Rehabilitation Robots:
Omnidirectional Interactive Mobile Robot for Arm Rehabilitation
• Authors: Ibrahim Yildiz
Pages: 1053 - 1059
Abstract: Robotic rehabilitation is a growing field. Robots facilitate repetitive therapies, which have positive effects on the rehabilitation of patients who lack arm control because of central nervous system lesions. However, the use of such rehabilitation robots is rare due to high costs and low acceptance among patients. Therefore, this study is focused on the development and control of a novel low-cost omnidirectional interactive mobile robotic platform with force feedback to assist and guide a patient’s hand during therapy. The primary goals for such a mobile robot are to minimize its weight and dimensions, which are significant factors in patient acceptance. Position-based stiffness control was employed with a proportional derivative controller to control the position of the robot and to assist the patient during motion. A user interface with given tasks was built to manage tasks, obtain test results and set control variables. Test results showed that the developed experimental mobile robot successfully assisted and guided the user during the test period.
PubDate: 2018-03-01
DOI: 10.1007/s13369-017-2707-8
Issue No: Vol. 43, No. 3 (2018)

• Numerical Analysis of the Wall Effect on Flow Around Airfoil Subjected to
a Pitching Movement
• Authors: Farouk Ziane; Abdellah Abdellah El-Hadj
Pages: 1061 - 1069
Abstract: In this work, we discuss the problem of the flow around a NACA0012 airfoil subjected to a pitching movement. The set of flow equations coupled with solid movement is solved with a finite element method using ANSYS program. Results show that our numerical model presents a good agreement in comparison with the experimental and the numerical results available in the literature. Next, the airfoil pitching movement is analyzed with the presence of the wall in the flow. It is shown that, the wall has a significant effect on aerodynamic parameters of airfoil. It found that the wall slows down the flow.
PubDate: 2018-03-01
DOI: 10.1007/s13369-017-2701-1
Issue No: Vol. 43, No. 3 (2018)

• Effect of Coke Size on the Mechanical and Wear Properties of Carburized
Mild Steel
Pages: 1083 - 1092
Abstract: The aim of this research is to investigate the effect of various coke sizes on the properties of carburized mild steels; therefore, five sets of samples were prepared and carburized at different temperatures and times. Three sets were carburized at 850, 900 and 950  $$^{\circ }\hbox {C}$$ for 120 min, while two other sets are carburized at 1000 and 1050  $$^{\circ }\hbox {C}$$ for 120 min. All sets were carburized using three different sizes of coke, namely A (<0.4 mm), B (1:1.6 mm) and C (4:5 mm). After carburization, all sets were quenched in water and then tempered at 200  $$^{\circ }\hbox {C}$$ for 15 min. After tempering, different mild steel samples were subjected to microstructure observation, hardness test, Charpy impact test, tensile testing and adhesive wear test. The experimental results were analyzed and show that mild steels carburized at 1050  $$^{\circ }\hbox {C}$$ with intermediate coke grain size B (1–1.6 mm) give the optimum results for the mechanical and wear properties which may be due to the microstructure obtained at this temperature (martensitic case and bainitic core). This indicates that coke size B gives the optimum combination of surface area and porosity needed for the reaction kinetics, as well as the highest wear resistance after different carburizing temperatures.
PubDate: 2018-03-01
DOI: 10.1007/s13369-017-2724-7
Issue No: Vol. 43, No. 3 (2018)

• Modeling of Surface Roughness Using RSM, FL and SA in Dry Hard Turning
• Authors: Mozammel Mia; Nikhil Ranjan Dhar
Pages: 1125 - 1136
Abstract: This paper presents the development of mathematical, predictive and optimization models of average surface roughness parameter ( $$R_{a}$$ ) in turning hardened AISI 1060 steel using coated carbide tool in dry condition. Herein, the mathematical model is formulated by response surface methodology (RSM), predictive model by fuzzy inference system (FIS), and optimization model by simulated annealing (SA) technique. For all these models, the cutting speed, feed rate and material hardness were considered as input factors for full factorial experimental design plan. After the experimental runs, the collected data are used for model development and its subsequent validation. It was found, by statistical analysis, that the quadratic model is suggested for $$R_{a}$$ in RSM. The adequacy of the models was checked by error analysis and validation test. Furthermore, the constructed model was compared with an analytical model. The analysis of variance revealed that the material hardness exerts the most dominant effect, followed by the feed rate and then cutting speed. Eventually, the RSM model was found with a coefficient of determination value of 99.64%; FIS model revealed 79.82% prediction accuracy; and SA model resulted in more than 70% improved surface roughness. Therefore, these models can be used in industries to effectively control the hard turning process to achieve a good surface quality.
PubDate: 2018-03-01
DOI: 10.1007/s13369-017-2754-1
Issue No: Vol. 43, No. 3 (2018)

• Experimental Study on Thermal Hydraulic Performance of Plate-Type Heat
Exchanger Applied in Engine Waste Heat Recovery
• Authors: Dong Junqi; Zhang Xianhui; Wang Jianzhang
Pages: 1153 - 1163
Abstract: This paper experimentally investigates the thermal hydraulic characteristics for three types of fluid on plate heat exchanger surfaces. The three types of fluid are R245fa, glycol and water. The characteristics of heat transfer coefficient Nu and friction factor f are given. The concept of pump power is provided to overall evaluate the enhanced heat transfer. The dimensionless correlation equations of Nu and f factors are provided using multiple regression method. The mean absolute errors for the Nu and f factor are 9.7 and 6.8% in the whole test range.
PubDate: 2018-03-01
DOI: 10.1007/s13369-017-2765-y
Issue No: Vol. 43, No. 3 (2018)

• Experimental and Finite Element Results for Optimization of Punch Force
and Thickness Distribution in Deep Drawing Process
• Authors: Masoud Kardan; Ali Parvizi; Ali Askari
Pages: 1165 - 1175
Abstract: Carrying out various experiments organized based on the design of experiments method, the deep drawing process is investigated entirely in this paper. The influences of eight main process parameters including punch and die radii, blank thickness, punch velocity, lubrication conditions at the interfaces of blank-die, blank-punch, and blank–blank holder as well as the blank holder force on the process outputs comprising punch force and sheet thickness variation are investigated. The analysis of variance method is considered to define the procedure by which these eight parameters be adjusted for deep drawing process to minimize the punch force and maximize the uniform thickness distribution in the products. It was found that for punch force, in addition to blank thickness, die and punch radii as well as the BHF are, respectively, the main essential parameters. Besides, blank thickness, die radius, and lubrication condition at the holder-blank interface are the most effective parameters on thickness distribution. Accordingly, initial blank thickness and die shoulder radius could be taken into account as two important parameters in deep drawing process should be set up appropriately to accomplish the minimum punch force and uniform thickness distribution together.
PubDate: 2018-03-01
DOI: 10.1007/s13369-017-2783-9
Issue No: Vol. 43, No. 3 (2018)

• Dual Solutions in Hydromagnetic Viscous Fluid Flow Past a Shrinking Curved
Surface
• Authors: M. Naveed; Z. Abbas; M. Sajid; J. Hasnain
Pages: 1189 - 1194
Abstract: An electrically directing viscous fluid’s boundary layer flow on a curved shrinking sheet with magnetic field is considered. Curvilinear coordinates system is used for mathematical modeling of the flow equations. By making use of similarity variables, the developed partial differential equations are reduced into sets of differential equations. Then, the attained differential equations describing the flow phenomena are resolved numerically through employing shooting scheme. The impacts of different pertinent factors, namely curvature, magnetic and suction parameters on velocity and pressure distribution, are shown graphically and are observed that dual-type solutions occur on a specific range of physical parameters. It is also noticed from these results that the flow velocity and the pressure within the boundary layer region are considerably affected by the shrinking and the mass transfer parameter since the pressure is no more constant in curved shrinking surface, as noticeable from the flat shrinking surface. Comparison of the numerical solution for the dual solution between the present studies with the existing solution is noticed in excellent agreement.
PubDate: 2018-03-01
DOI: 10.1007/s13369-017-2772-z
Issue No: Vol. 43, No. 3 (2018)

• Effect of Storage Conditions on Moisture Sorption of Mixed Biomass Pellets
• Authors: Lyes Bennamoun; Noorfidza Y. Harun; Muhammad T. Afzal
Pages: 1195 - 1203
Abstract: The aim of this paper was to study the moisture sorption characteristics of mixed biomass pellets. The pellets were developed using a mixture of woody (spruce or pine) and agricultural (reed canary grass or hay) biomass with a ratio of 1:1. The pellets were stored in a controlled environment until reaching the equilibrium moisture content. The temperature of the controlled environment was varied between 15 and 25  $$^{\circ }\hbox {C}$$ and relative humidity between 20 to 90%. The experimental results showed this temperature range had no effect on the moisture sorption isotherms. However, the equilibrium moisture content at higher relative humidity was found dependent on the type of the material and was higher for spruce-hay pellets compared to the other tested pellets. Oswin, Guggenheim-Anderson-de Boer, Henderson and Peleg models were tested for the prediction of the moisture isotherms. With a coefficient of determination varying between 0.998 and 0.995, a standard error between 0.054 and 0.071 and chi-square error ranging between 0.009 and 0.015, Oswin model was found more suitable to predict the moisture sorption isotherms of all biomass pellets. This result was further confirmed using the residuals plot, showing a more uniform distribution for Oswin model compared to the other models.
PubDate: 2018-03-01
DOI: 10.1007/s13369-017-2808-4
Issue No: Vol. 43, No. 3 (2018)

• Numerical Simulation and Experimental Comparison of Single, Double and
Triple Serpentine Flow Channel Configuration on Performance of a PEM Fuel
Cell
• Authors: Venkateswarlu Velisala; G. Naga Srinivasulu
Pages: 1225 - 1234
Abstract: In this study, the effect of single (1-S), double (2-S) and triple (3-S) serpentine flow field configuration on the performance of PEM fuel cell (PEMFC) was investigated both numerically and experimentally. First, a complete 3-D PEMFC model was developed, and simulations were carried out to examine the effect of 1-S, 2-S and 3-S flow field configuration on the performance of PEMFC using commercial CFD code ANSYS FLUENT. Along with the cell performance, important parameters such as pressure distribution, mass fraction of hydrogen, oxygen, liquid water activity, current flux density distribution and the membrane water content have been presented. Next, an experimental study is carried out with a PEMFC by changing 1-S, 2-S and 3-S flow field configurations to verify the numerical predictions. Finally numerically and experimentally obtained performance curves have been compared, and 1-S flow channel fuel cell is found to exhibit the best electrochemical performance compared with the 2-S and 3-S flow channel fuel cells.
PubDate: 2018-03-01
DOI: 10.1007/s13369-017-2813-7
Issue No: Vol. 43, No. 3 (2018)

• The Effect of Microstructural Features and Thickness on Fracture Toughness
of Ti–6Al–4V ELI Thin Sheets
• Authors: Saeed Aliakbari; Yaser Salehi Yegaie
Pages: 1247 - 1255
Abstract: Thin plates made of Ti–6Al–4V ELI alloy are extremely useful and applicable material of implants industries. The present research is focused on the fracture toughness of Ti–6Al–4V ELI thin sheets through the mechanical and microstructural analyses. The load displacement curves resulted from tear testing methodologies in addition to tensile test were provided for both lamellar and equiaxed microstructures with three different thicknesses. Unit initiation and propagation energies, as an indication of fracture toughness, associated with tear strength were calculated from the curves. Furthermore, the influence of heat treatment’s soaking time for equiaxed microstructure and cooling rate for lamellar microstructure on tear testing, unit initiation and propagation energies was studied. In respect of the equiaxed microstructure, grain growth evolved from the extended soaking time was resulted in destructive effect on crack initiation resistance with increasing thickness, though it marginally affected the crack propagation resistance and fracture toughness. Regarding the lamellar microstructure, thinning the lamellas encouraged crack initiation and propagation resistance for thin sections. However, crack propagation resistance was reduced for thicker sections which contrasts with increasing crack initiation resistance by rising sample thickness. On overall view, increasing sample thickness associated with reducing the grain size was beneficial for crack resistance in equiaxed microstructure. In respect of the lamellar microstructures, thin lamellae particularly in thin sections was superior in terms of crack resistance.
PubDate: 2018-03-01
DOI: 10.1007/s13369-017-2815-5
Issue No: Vol. 43, No. 3 (2018)

• Combustion Performance of Diesel Palm Olein Fuel: A Combined CFD and
Experimental Approach
• Authors: Ahmad Hussain; Syed Murtuza Mehdi; Maaz Akhtar; Farid Nasir Ani; Iqbal Ahmed
Pages: 1291 - 1300
Abstract: Industrial gas turbine fueled by blended palm olein is a promising option for electricity generation in next generation of gas turbines. In order to evaluate combustion performance of palm olein and blended diesel in a combustion chamber, detailed experimental investigations were done to evaluate the combustion performance of diesel and palm olein blended fuels. The experimental studies were conducted for 100% diesel and blending diesel with 10, 20, 30, 40, 50 and 60% palm olein (PO). The combustion performances were evaluated for blended oil and compared with diesel. The emission of NO ranged from 30–55 ppm while the soot emissions were high for high blended fuel. A maximum blending ratio of 30% PO was recommended to be used in gas turbines in order to avoid any modification in the spray combustion system so that it can be utilized in existing gas turbine systems. The computational fluid dynamic modeling of the combustor was also done, and a comparison was made between the experimental and computational results. This can be helpful in future parametric studies of the combustor performance under different operating conditions. An acceptable level of comparison between numerical simulations and experimental findings was obtained as far as the flame structure is concerned. For high blended fuel, it was found out that increasing amount of soot particles can damage the blades of the turbine which ultimately requires early monitoring and maintenance scheduling.
PubDate: 2018-03-01
DOI: 10.1007/s13369-017-2823-5
Issue No: Vol. 43, No. 3 (2018)

• Sensing and Control of Thermally Induced Vibrations of Stationary Blades
Using Piezoelectric Materials
• Authors: K. S. Al-Athel; H. M. Al-Qahtani; M. Sunar; L. Malgaca; A. Omar
Pages: 1301 - 1311
Abstract: Vibration sensing and control of stationary blades (beam/plate-type structures) using piezoelectric materials subjected to thermal loads are considered in this work. Thermal effects are imposed on these blades, which are assumed to be mounted with piezoelectric patches for vibration sensing and control. Effects of the temperature field on the piezoelectric media are treated through the phenomenon of thermopiezoelectricity where electrical, mechanical, and thermal fields are all coupled. First, static blades are considered without control using the finite element method and analytical equations for verification of the finite element model. The finite element program ANSYS is utilized to implement the finite element method in all cases. Negative velocity feedback is then applied for the control of thermally induced vibrations of these stationary blades using the piezoelectric materials. It is concluded that the finite element model is accurate and that the use of the piezoelectric materials in the roots of stationary blades for the purpose of controlling thermally induced vibrations via a negative velocity feedback scheme is possible.
PubDate: 2018-03-01
DOI: 10.1007/s13369-017-2832-4
Issue No: Vol. 43, No. 3 (2018)

• Artificial Neural Network-Based Modeling for Impact Energy of Cast Duplex
Stainless Steel
• Authors: Titus Thankachan; K. Sooryaprakash
Pages: 1335 - 1343
Abstract: The exploitation of artificial neural network as a computational technique in predicting the impact energy of cast duplex stainless steels based on its chemical composition is reported in this research work. Two hundred and twenty melts of duplex stainless steel of different compositions were casted, heat-treated and tested for Charpy impact test. A multilayer feed forward ANN model was developed based on 75% of the available chemical compositions of duplex stainless steel as input and impact energy in joules as output. The prediction efficiency of the developed models was calculated based on mean absolute error and mean absolute percentage error; the best model thus sorted out was validated and tested. A multilayer feed forward ANN model with two hidden layers was selected which provided better linear correlation between the chemical composition and impact energy. Correlation performance of considered ANN model with network topology expressed in terms of mean absolute percent error was found to be 0.43% with a correlation coefficient value of 0.95714. Testing and evaluation of the developed model proved to be efficient enough for the development of duplex stainless steels with required impact toughness.
PubDate: 2018-03-01
DOI: 10.1007/s13369-017-2880-9
Issue No: Vol. 43, No. 3 (2018)

• Microstructural Characterization, Mechanical, Physical and Thermal
Properties of a Diesel Particulate Filter
• Authors: Nurcan Calis Acikbas; Yigit Ture; Emre Gurlek; Selcuk Ozcan; Seref Soylu; Gokhan Acikbas; Turker Gudu
Pages: 1383 - 1394
Abstract: In the literature, limited studies are available due to the challenges of the detailed microstructural characterization and determination of properties of diesel particulate filters (DPFs). For this reason, the characterization of a commercial DPF was carried out with different techniques with the aim to identify the manufacturing processes, the chemical composition, the microstructure and the mechanical, physical and thermal properties. Scanning electron microscopy (energy-dispersive X-ray spectroscopy, back-scattered electron, secondary electron detectors), X-ray diffraction, universal mechanical testing, Archimedes technique, dilatometer and C-therm thermal conductivity analysis tools were used for the characterization. During DPF regeneration, the tailoring of these properties has crucial effect on the reliability and durability of the filter. The value of the thermal shock resistance parameter group $$\sigma _{\mathrm{f}}/E\alpha$$ was calculated to be 426 K, while thermal conductivity (k) was determined as 1.95 W/mK. When compared to the literature values for dense SiC, the $$\sigma _{\mathrm{f}}/E\alpha$$ value indicated a better thermal shock resistance; however, thermal conductivity was on the limits of an order of magnitude worsening the thermal shock resistance. Therefore, to improve the thermal shock resistance of the filter material, the thermal conductivity value has to be increased to the maximum allowed by the required porosity. The study may lead to tailoring of an optimized SiC DPF material.
PubDate: 2018-03-01
DOI: 10.1007/s13369-017-2872-9
Issue No: Vol. 43, No. 3 (2018)

• A Control Scheme for Navigation and Obstacle Avoidance of Autonomous
Flying Agent
• Authors: J. C. Mohanta; Dayal R Parhi; S. R. Mohanty; Anupam Keshari
Pages: 1395 - 1407
Abstract: This paper addresses the problem of trajectory tracking and control of a low-cost flying agent, equipped with a microcontroller for real-time navigation. A flying agent (aircraft-type quadcopter) has been designed and developed for steering control along a planned trajectory. A novel control scheme is developed using MATLAB/Simulink to ensure the right balance among pitch, roll and yaw of the flying agent wings. The proposed control scheme utilises a PID controller which regulates the error dynamics to stabilise the navigation. Various trajectories have been generated and verified through simulation studies as well as tested in a real model. The real-time experiments verify the manoeuvrability of the controller, which also checks the compatibility with hardware interfaces.
PubDate: 2018-03-01
DOI: 10.1007/s13369-017-2899-y
Issue No: Vol. 43, No. 3 (2018)

• Effect of Aspect Ratio on Natural Convection in a Porous Wavy Cavity
• Authors: H. T. Cheong; S. Sivasankaran; M. Bhuvaneswari
Pages: 1409 - 1421
Abstract: The present study analyzes natural convective flow and heat transfer in a wavy cavity saturated with porous medium. The sidewalls of the cavity are maintained at constant temperatures where higher temperature is applied on the vertical left wall while the wavy right wall is cooled at a lower temperature. The remaining top and bottom walls are taken to be adiabatic. The Darcy model is adopted for the fluid flow through the porous medium. The governing equations and boundary conditions are solved using the finite difference method over a range of cavity aspect ratios, wavy wall amplitudes, number of undulations and Darcy–Rayleigh numbers. The waviness of the cavity enhances the heat transfer inside the cavity, and the heat transfer rate is more enhanced when the aspect ratio of the cavity is close to 1. The study is applicable to the design of solar heating systems and geothermal reservoirs.
PubDate: 2018-03-01
DOI: 10.1007/s13369-017-2948-6
Issue No: Vol. 43, No. 3 (2018)

• Effects of Geometric Parameters on Air Suction Characteristics of a New
Jet-Type Foam Generator for Mine Dust Suppression
• Authors: Hetang Wang; Deming Wang; Yan Tang; Xinxin He
Pages: 1445 - 1454
Abstract: This paper proposes a novel jet-type foam generator of air self-suction intended for dust control in coal mines that overcome the shortcomings of conventional compressed air foam preparation devices. Three non-dimensional numbers of geometric parameters were obtained through theoretical analysis, namely distance–diameter ratio ( $$R_\mathrm{td})$$ , length–diameter ratio ( $$R_\mathrm{ld})$$ , and area ratio ( $$R_{\mathrm{m}})$$ . And various experiments were conducted to investigate the effects of the three important non-dimensional geometric parameters on air suction properties of the proposed foam generator. The results show that air suction capacity first increases and then decreases with the increasing of $$R_\mathrm{td}$$ and $$R_\mathrm{ld}$$ , and air–water ratio increases with the increasing of $$R_{\mathrm{m}}$$ . And the optimum distance–diameter ratio is identified to be 1/3–2/3, the optimum length–diameter ratio is approximately 20, and the optimum area ratio should be 81–144. This study provides a solid foundation for application of the proposed foam preparation technology.
PubDate: 2018-03-01
DOI: 10.1007/s13369-017-2978-0
Issue No: Vol. 43, No. 3 (2018)

• An Experimental Study on Engine Dynamics Model Based on Indicated Torque
Estimation
• Authors: Mohamed Seddak; Abdelkrim Liazid
Pages: 1475 - 1484
Abstract: Indicated torque has much information regarding the engine performance such as fuel burning rate, combustion heat release rate, mean effective pressure and fuel ratio. It is a good indicator of an engine’s stability to do work. However, due to cost and integration complexities, it is not profitable to use instantaneous torque sensors in automotive series production. The work presented in this paper proposes a comprehensive and practical solution for indicated torque estimation and in-cylinder pressure. Thermodynamic model for predicting engine cycle and measured crankshaft speed fluctuations is used to reach the goal. The result of numerical prediction has been confronted with experimental data. The comparison between various variables, namely gas pressure, total torque and indicated torque, shows good agreement between simulation and experimental results.
PubDate: 2018-03-01
DOI: 10.1007/s13369-017-2970-8
Issue No: Vol. 43, No. 3 (2018)

• Effect of Al $$_{2}\mathrm{O}_{3}$$ 2 O 3 Nanoparticles on the Mechanical
and Physical Properties of Epoxy Composite
• Authors: Omar M. Yousri; Mohamed Hazem Abdellatif; Ghada Bassioni
Pages: 1511 - 1517
Abstract: The effect of alumina nanoparticles and the dispersion homogeneity on the composite performance, in terms of mechanical and physical properties, has been studied extensively. The effect of alumina nanoparticles weight percentage (0.25–0.5–0.75–1 wt%) and particle size of 60 nm mixed with commercial epoxy resin (Kemapoxy 150) are used in this investigation. Bending, hardness, tension, erosion, water absorption, and TGA tests are studied. Experimental results indicate improvement in the mechanical behavior with 0.25 wt% particles for both bending strength and wear resistance by 7 and 67% relative to pure epoxy. Water absorption depends mainly on particle distribution, and TGA testing slightly increases with the increase in particles dosage. The tested samples were studied using environmental scanning electron microscopy. Good distribution and dispersion of nanoparticles in the epoxy matrix lead to reducing the mobility of the epoxy chains due to the formation of high immobile nano-layers around the alumina nanoparticles. Thus, creating hydrogen bonding between chains and particles. Consequently, increased constraints between particles/polymer chains and polymer chains themselves are found leading chains to bear extra forces. Fracture strength decreases due to nanoparticles agglomerations causing an increase in the space distance (free volume space) between epoxy chains. This study suggests possible applications of the tested coating due to improved mechanical and physical properties upon nanoparticles addition.
PubDate: 2018-03-01
DOI: 10.1007/s13369-017-2955-7
Issue No: Vol. 43, No. 3 (2018)

• Analysis on Automobile HDPE Fuel Tank Crashworthiness with Respect to
Environmental Temperature
• Authors: Lingyu Sun; Bincheng Huang; Lijun Li; Zhongheng Guo; Yi Lin
Pages: 1519 - 1528
Abstract: Polymer fuel tanks with multilayered high-density polyethylene (HDPE) have been utilized extensively in vehicles. However, the temperature-dependent properties affect their usage life and crashworthiness, which need to be predicted and evaluated quantitatively before manufacture. In this paper, the influence of temperature on the materials behavior was investigated experimentally. Tension modulus and yield stress of HDPE at a wider temperature range compared with the previous research, from − 50 to 95  $$^{\circ }\hbox {C}$$ , were measured. Then, the stress–strain constitutive model of HDPE before yield stage was modified by adding thermal strain items in the conventional rule of mixture. Also the relationship between elastic modulus and yield stress was established. From above the achievements, drop tests of HDPE fuel tank filled with oil at various temperatures were simulated and the sensitivity of ambient temperature on the peak crash stress of HDPE fuel tank with various wall thicknesses was compared. The results show that temperature-dependent material data and fluid–structure coupling simulation method are significant for the crashworthiness design and evaluation of HDPE fuel tank. Environmental temperature except changed thickness of tank wall has affected the energy absorption ability obviously, which should be considered at design stage.
PubDate: 2018-03-01
DOI: 10.1007/s13369-017-2878-3
Issue No: Vol. 43, No. 3 (2018)

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