轻量化是电动汽车产业化的关键技术之一，碳纤维织物增强复合材料能有效实现电动汽车结构轻量化，然而对其冲击损伤机理和碰撞安全性认识尚不充分，影响其推广应用。项目拟通过试验研究，掌握碳纤维织物增强复合材料二通和三通基础结构的冲击性能和剩余强度规律；通过细观力学有限元分析，建立能够综合考虑织物材料纤维、树脂和界面破坏的三维精细化损伤演化模型；采用有限元方法结合二次开发，开展复杂车身结构的多尺度一致性损伤演化分析方法研究，实现整体结构破坏区域损伤程度的高效预测；结合结构设计试验和仿真计算，揭示结构参数对损伤演化的影响规律。本研究成果对完善增强复合材料结构（以往多为层合板）的损伤机理，建全复杂结构损伤分析方法，指导轻量化结构设计具有较高的学术价值和显著的实践意义。

Lightweight is one of main techniques for the industrialization of electric vehicles. The carbon textile fiber reinforced plastic material(CFRP) can achieve the lightweight of electric vehicle effectively, however the investigations on the impact mechanism and safe performance of structures made of CFRP are not sufficient, and these limit the application of them. Firstly, the damage analysis and residual strength of rectangular tubes and T-shape tubes made of CFRP under low velocity impact tests are investigated; Secondly, a three-dimension refined simulation model is developed to predict the damage behavior of fiber, resin and interfaces, which is compared with experimental results; Thirdly, the multiscale modeling and damage analysis are applied on complex electric vehicle structure in order to improve the accuracy and efficiency of the failure degree prediction inside the impact zone; Finally, the relationship between damage evolution and structure parameters is obtained combining structural design tests and simulation analysis. The investigation is useful for expanding the damage mechanism of hollow structure made of CFPR under low velocity impact, also developing an effective multiscale damage analysis method for complex structure, which will play a key role in practical lightweight structural design.