聚氨酯泡沫填充的碳纤维增强复合材料锥管吸能性能数值模拟及试验验证

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。

Numerical Simulation and Experimental Verification of Energy Absorption Performance of PU Foam Filled CFRP Cone Tubes

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.