摘要
鉴于碳纳米管高强度和高刚度的特点,制备了一种碳纳米聚氨酯泡沫复合材料,采用试验与仿真相结合的方法探讨碳纳米聚氨酯泡沫及其填充薄壁管复合结构的压溃机理、吸能特性和应用效果。通过准静态压缩试验获得不同碳纳米含量泡沫材料的载荷-位移曲线,并对比其承载和吸能能力,确定添加碳纳米管的最佳质量比;对薄壁管和泡沫填充薄壁管的吸能特性进行试验和仿真,验证泡沫填充结构有限元模型的有效性;最后将碳纳米聚氨酯泡沫填充于某轿车B柱来验证吸能效果。结果表明,填充该材料后的B柱最大侵入量和侵入速度均有明显降低,在满足轻量化的前提下,具有良好的吸能特性。
In view of the high strength and high stiffness teatures of carbon nanotubes, a kind of carbon nanotube reinforced polyurethane foam composite is prepared, and test and simulation are conducted to explore the crushing mechanism, energy absorption characteristics and applications of carbon nanotube reinforeed polyurethane foam and the compound structure of its filled thin-walled pipe. Then through quasi-static compression test, the loaddeflection curves of foams with different proportions of carbon nanotube are obtained, their capabilities of load bearing and energy absorption are compared, and the optimum mass fraction of carbon nanotube added is determined. Next, test and simulation are performed on the energy absorption characteristics of thin-walled pipes and form-filled thin-walled pipes, verifying the effectiveness of FE model for foam-filled structure. Finally carbon nanotube reinforced polyurethane foam is filled into the B-pillar of a ear to validate its energy absorption effects. The results show that the maximum intrusion and intrusion velocity of foam-filled B-pillar are obviously reduced, exhibiting good energy absorption feature while meeting lightweight requirements.
作者
崔岸
孙文龙
李彬
程普
Cui An;Sun Wenlong;Li Bin;Cheng Pu(Jilin University,State Key Laboratory of Automotive Simulation and Control,Changchun 130025)
出处
《汽车工程》
EI
CSCD
北大核心
2018年第11期1282-1287,1316,共7页
Automotive Engineering
基金
国家科技支撑计划项目(2011BAG03801)资助.
关键词
碳纳米管
聚氨酯泡沫
吸能特性
薄壁圆管
B柱
carbon nanotubes
polyurethane foam
energy absorption characteristics
thin-walled pipe
B-pillar
作者简介
通信作者：孙文龙，硕士研究生，E-mail：742262792@qq．com。
