Lightweight design of carbon twill weave fabric composite body structure for electric vehicle
Lightweight design of carbon twill weave fabric composite body structure for electric vehicle
复制标题
DOI：
10.1016/j.compstruct.2012.09.052
复制
发表时间：
2013-03-01
影响因子：
6.3
通讯作者：
Li, Qing
中科院分区：
文献类型：
--
作者：
Liu, Qiang;Lin, Yongzhou;Li, Qing
与金属材料相比，复合材料的设计更具挑战性，因为其微观组织的异质性和行为的复杂性。本文旨在建立一种多尺度预测碳斜纹织物复合材料三维弹性模型的方法，并将其应用于电动汽车车身结构的耐撞性分析。利用光学显微镜对T300碳斜纹织物复合材料的微观结构进行了测量，得到了复合材料的几何参数。采用均质化技术，建立了层合复合材料的代表性体积单元有限元模型，以表征材料的弹性性能。数值结果与单轴拉伸和三点弯曲试验结果进行了比较。最后，将该复合材料的本构模型应用于电动汽车车身结构在车顶碰撞和侧杆碰撞下的耐撞性分析。研究表明，利用弹性性能计算的层合板变形行为与拉伸和弯曲实验结果吻合较好，最大相对误差分别为4.04%和7.79%。与此同时，与玻璃纤维增强塑料（GFRP）相比，使用碳斜纹织物复合材料可以减轻28%的重量。(C) 2012 Elsevier Ltd.版权所有。
Design of composite appears more challenging compared with metallic counterparts because of its microstructural heterogeneity and behavioral sophistication. This paper aims to develop a multiscale approach for predicting three-dimensional elastic model of carbon twill weave fabric composite which will be applied to crashworthiness analysis of body structure of electric vehicle. The geometric parameters were obtained by measuring the microstructure of T300 carbon twill weave fabric composite through optical microscopy. The finite element model of representative volume element (RVE) in laminate composite was established to characterize the elastic properties of the materials using the homogenization technique. The numerical results of property were compared with those from uniaxial tensile and three point bending tests. Finally, the constitutive model of such composite was employed to crashworthiness analysis for electric vehicle body structure under the roof crash and side pole impact. The study indicates that the deformation behaviors of laminate calculated by using the elastic properties are in good agreement with tensile and bending experimental results with maximum relative errors of 4.04% and 7.79%, respectively. Meanwhile, a 28% savings of body weight is achieved using the carbon twill weave fabric composite compared to its predecessor made of glass fiber reinforced plastics (GFRP). (C) 2012 Elsevier Ltd. All rights reserved.