碳纤维复合材料车门防撞梁多尺度高效变形模拟及实验验证

Multi-scale efficient simulation on deformation of CFRP car door anti-collision beam and experimental verification

以碳纤维复合材料车门防撞梁为例,开发了一种面向工程零部件的多尺度高效变形模拟技术,建立了自洽聚类分析方法及多尺度渐进损伤本构模型,通过多尺度单元与唯象单元混合建模,有效降低了模型的求解成本,通过将有限的计算资源分配在恰当的位置,结果表明计算资源的利用效率得到显著提升,实现了工程零部件损伤行为的高效预测,实际计算时间缩短至原来的1/4。对三点弯状态下复合材料防撞梁的宏微观渐进损伤过程进行了分析。基于真空袋成形工艺进行了防撞梁样件试制以及三点弯破坏实验,验证了仿真结果的准确性。

Taking carbon fiber reinforced plastic car door anti-collision beam as an example,a multi-scale efficient simulation technology for engineering components was developed.The self-consistent cluster analysis method and the multi-scale progressive damage constitutive model were established.Through the hybrid modeling of multi-scale units and phenomenological elements,the solving cost of the model is effectively reduced.By allocating limited computing resources to appropriate locations,the results show that the utilization efficiency of computing resources is significantly improved,the efficient prediction of the damage behaviors of engineering components is realized,and the actual calculation time is shortened to 1/4 of the original.The macroscopic and microscopic progressive damage process of the composites anti-collision beam under three-point bending conditions was analyzed.Based on the vacuum bag forming process,the anti-collision beam sample was produced and the three-point bending failure experiment was carried out to verify the accuracy of the simulation results.