期刊论文

Stiffness Analysis of Vehicle Hood Based on Multi-scale Co-simulation

中文

塑料工业

1005-5770

2019

47

4

73-77,82

10.3969/j.issn.1005-5770.2019.04.016

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.

本校为第一机构

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 r...