Analysis of Lightweight Composite Body Structure for Electrical Vehicle Using the Multiscale Approach

doi:10.3901/JME.2016.06.145

Abstract

Abstract: Design of composite structure appears more challenging compared with metallic counterparts because of its microstructural heterogeneity and sophisticated mechanical property. The crashworthiness of composite body structure is investigated by using multiscale approach. The representative volume elementis established by geometric parameters which are obtained by measuring the microscopic structure of T300/Epoxy. Coupled with the periodical boundary condition, the representative volume element is adopted to predict the 3D elastic properties of laminate composite by the finite element method. And the prediction results coincide with the experimental data well. A progressive failure model of laminate composite is established by using material model MAT_54 of LS-Dyna. The simulation results of three points bending test are in good agreement with experimental results by adjusting the model parameters according to experiment results. This model is applied to crashworthiness analysis of composite body structure for electrical vehicle under the roof crash and side pole impact. The simulation results indicate that the design of composite body structure meets the requirements. Meanwhile, the crashworthiness of body structure has been increased coupled with a 59% saving in the body weight compared to the aluminum body structure.

Key words: carbon woven fabric composites, electrical vehicle, lightweight, multiscale approach

CLC Number:

TB332

ZHU Guohua, CHENG Aiguo, WANG Zhen, LEI Fagui. Analysis of Lightweight Composite Body Structure for Electrical Vehicle Using the Multiscale Approach[J]. Journal of Mechanical Engineering, 2016, 52(6): 145-152.

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