摘要
为提高复合材料汽车前罩刚度仿真精度,以高性能增强聚丙烯热塑性复合材料作为汽车前罩材料,通过Helius PFA软件将模流分析所得内外板纤维取向张量、残余应变结果映射至结构刚度分析模型,并添加非线性弹塑性材料建立多尺度联合仿真模型进行扭转刚度、前部弯曲刚度、后部弯曲刚度仿真,其仿真结果和传统仿真结果与实验结果对比分析。结果表明,基于多尺度联合仿真模型的仿真结果更贴近实验值,最小误差为3. 7%,最大误差为9. 5%,相对传统仿真方法误差最大减少17%,验证了多尺度联合仿真方法具有更高精度和可靠性。该方法可为同类复合材料注塑制品的结构设计优化提供参考和应用价值。
In order to improve the stiffness simulation precision of composite vehicle hood, high performance reinforced polypropylene thermoplastic composites were used as the automobile hood materials.The results of fiber orientation tensors and residual strains from the inner panel and the outer panel obtained by moldflow analysis were mapped to structural stiffness analysis model by Helius PFA software. And nonlinear elastoplastic materials were added to establish a multi-scale co-simulation model to simulate the torsional stiffness,front bending stiffness and rear bending stiffness. The analysis results and the traditional simulation results were compared with experimental results. The results show that the simulation results based on multiscale co-simulation model are closer to the experimental value,the minimum error is 3. 7%,the maximum error is 9. 5%,and the error is decreased up to 17%comparing with the traditional simulation method,which verifies the higher accuracy and reliability of the multi-scale co-simulation method. This method could provide reference and application value for structural design optimization of similar composite injection molded products.
作者
张立强
刘飞
薛志刚
刘颖
ZHANG Li-qiang;LIU Fei;XUE Zhi-gang;LIU Ying(College of Mechanical and Electrical Engineering,Central South University of Forestry and Technology,Changsha 410004,China;State Key Laboratory of Advanced Design and Manufacture for Vehicle Body,Hunan University,Changsha 410082,China;Changan Oushang Automobile Institute,Chongqing 400023,China)
出处
《塑料工业》
CAS
CSCD
北大核心
2019年第4期73-77,82,共6页
China Plastics Industry
基金
湖南省自然科学基金项目(2018JJ2681)
湖南省高校科技创新团队支持计划资助
