一种内嵌CFRP的汽车铝合金前纵梁吸能特性研究  

Investigation into the Energy-absorbing Characteristics of Automotive Aluminum Front Side Rail with CFRP Inserted

作　　者：姚威[1] 宋凯[1] 吴永强[1] 何智成[1] 王振[1] 

机构地区：[1]湖南大学,汽车车身先进设计制造国家重点实验室,长沙410082

出　　处：《汽车工程》2017年第12期1390-1396,共7页Automotive Engineering

基　　金：国家自然科学基金青年项目(51605155);国家国际科技合作专项(2016YFE0102200)资助

摘　　要：提出一种内嵌碳纤维复合材料(CFRP)的汽车铝合金前纵梁结构,研究了内嵌CFRP对铝合金前纵梁吸能特性的影响。通过仿真验证内嵌CFRP可改善铝合金前纵梁吸能特性,并制备前纵梁试样进行轴向冲击试验,分析铝合金前纵梁压溃过程和吸能特性,并研究了斜向冲击下前纵梁吸能特性。结果表明:在轴向冲击下,内嵌CFRP可显著改善汽车铝合金前纵梁的吸能特性,比吸能和碰撞力效率最大分别提高32%和35%,加强CFRP层合板横向支撑和增加CFRP层合板厚度可提高前纵梁的比吸能;在斜向冲击下,提供良好横向支撑的CFRP内嵌方式可有效改善铝合金前纵梁压溃形式,与单一铝合金前纵梁相比,明显提升了斜向冲击的吸能效果。A new structure of automotive aluminum front side rail with carbon fiber reinforced plastic （CFRP） inserted is presented and the influence of CFRP on energy-absorbing characteristics of aluminum front side rail is investigated. Simulation verifies that the inserted CFRP can improve the energy-absorbing characteristics of a-luminum front side rail,and the test pieces of front side rail are prepared to conduct axial impact test for analyzing its collapse process and energy-absorbing characteristics,including that under inclined impact. The results show that under axial impact, inserted CFRP can significantly improve the energy-absorbing characteristics of aluminum front side rail,with its specific energy absorption and crush force efficiency increasing by 32% and 35% at most respec-tively ,while strengthening transverse supports and increasing thickness of CFRP laminates can also increase specific energy absorbed. Under inclined impact,inserted CFRP with good transverse supports can effectively improve the collapse mode of front side rail,with its energy absorbing effects enhanced under inclined impact,compared with o-riginal uniform aluminum rail.

关 键 词：前纵梁 碳纤维复合材料 铝合金 冲击 吸能 

分 类 号：U463.326[机械工程—车辆工程]