Mohammad Shariyat; Abbas Ganjipour
Abstract
In the present paper, employing a complete model of a passenger car, contribution of various components and assemblies in the frontal crash energy absorption is determined. Thickness of components with more remarkable contribution is increased to improve the occupant safety. Furthermore, effects of substituting ...
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In the present paper, employing a complete model of a passenger car, contribution of various components and assemblies in the frontal crash energy absorption is determined. Thickness of components with more remarkable contribution is increased to improve the occupant safety. Furthermore, effects of substituting the metallic bumper with one fabricated from GMT materials on the frontal crash behavior of the vehicle are investigated. Boundary condition and dynamic parameters are defined in PAM-CRASH software. To increase the accuracy of the results, all sub-assemblies and their joints are precisely modeled. Finally, components with more remarkable contribution in energy absorption are detected and a comparison is made between the crash results of the original design and the crash results obtained after the mentioned modifications.
Mohammad Shariyat; Ali Reza Askari
Abstract
In this paper, transfinite element method is used to analyze the two dimensional thermoelasticity problems. A comparison is made between the thermoelastic analysis results of the classical theory and theories with one or two relaxation times (i.e. L-S and G-L theories), for the half space problem. Governing ...
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In this paper, transfinite element method is used to analyze the two dimensional thermoelasticity problems. A comparison is made between the thermoelastic analysis results of the classical theory and theories with one or two relaxation times (i.e. L-S and G-L theories), for the half space problem. Governing equations are transformed to Laplace domain and then, node variables are calculated by the finite element method. Results are transformed to physical domain by the Laplace inverse transform. Finally, results of the three theories are compared and discussed. The obtained results reveal that the tensional stresses predicted by the classical theory for points located before the stress wavefront are higher whereas the compressive stresses predicted by L-S and G-L theories are higher for points located after the stress wavefront. Furthermore, the temperature predicted by the modern theories is higher than that of by the classical theory at the wavefornt.
