摘要
提出了一种新型的碳纤维增强复合材料(CFRP)填充聚氨酯(PU)泡沫的汽车前部吸能结构,通过材料性能试验获得了PU泡沫、CFRP复合材料的力学性能参数及PU泡沫填充的CFRP锥管的准静态压缩吸能结果。应用LS-DYNA进行复合材料准静态压溃仿真分析,仿真结果与试验结果吻合较好,验证了复合材料填充结构有限元模型和材料模型的正确性,并且发现泡沫填充的CFRP锥管具有良好的吸能性能,填充结构比吸能高于两种材料单独使用时的比吸能之和。
A new type of CFRP filled with polyurethane(PU)foam was proposed for the vehicle front energy absorbing structures.The mechanical properties of PU foam and CFRP composites were obtained by the material property tests,and the results of quasi-static compression of PU foam filled CFRP were obtained.LS-DYNA was used to simulate the quasi-static collapse of composite materials.The simulation results are in good agreement with the experimental results,which verifies the correctness of the finite element model and the material model of the composite filled structures.The results show that the foam filled CFRP cone tubes have good energy absorption ability,and the filling structure specific energy absorptions are higher than that of the two materials used alone.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2018年第5期609-615,共7页
China Mechanical Engineering
基金
国家自然科学基金资助项目(51505138)
关键词
准静态压缩
聚氨酯泡沫
碳纤维增强复合材料
比吸能
quasi-static compression
polyurethane(PU)foam
carbon fiber reinforced polymer(CFRP)
specific energy absorption
