泡沫铝填充矩形截面薄壁梁压溃力理论表达式  

Crushing model of rectangular section thin-walled beam filled with aluminum foam

作　　者：张君媛[1,2] 张秋实[1] 刘卫国[3] 张乐[1] 武栎楠[1] 周浩[1] 

机构地区：[1]吉林大学汽车仿真与控制国家重点实验室,长春130022 [2]清华大学汽车安全与节能国家重点实验室,北京100084 [3]浙江吉利汽车研究院有限公司,杭州311228

出　　处：《吉林大学学报（工学版）》2016年第3期745-750,共6页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(51375203);汽车安全与节能国家重点实验室开放基金项目(KF16152);吉林省科技发展计划项目(20160101269JC);浙江省汽车安全技术重点实验室项目(YSD0C11-02)

摘　　要：在矩形截面空管薄壁梁压溃理论基础上,考虑压溃过程中泡沫铝填充对压溃距离的影响以及薄壁梁管壁与泡沫铝之间相互作用对压溃力的影响,推导出了泡沫铝填充的矩形截面薄壁梁压溃力表达式。该压溃力理论表达式由修正的薄壁梁空管压溃力、泡沫铝压溃力以及薄壁梁与泡沫铝的相互作用力三部分构成。应用已有的泡沫铝填充低碳钢和铝合金正方形截面薄壁梁实验数据对压溃力理论表达式进行验证,结果表明:理论表达式具有较高的精度。A crushing model of rectangular section thin-walled beam filled with aluminum foam is proposed based on the theory of hollow rectangular section beams.The influence of the aluminum foam on the effective crushing length and the interaction between the foam and the thin-walled beam in crushing are considered in this crushing model.The average crushing force is composed of three parts,the modified hollow beam crushing force,the aluminum foam crushing force and the interaction force between the foam and the beam.Experiment data of mild steel and aluminum thin-walled beams filled with aluminum foam are adopted to validate the proposed crushing model.It is shown that the theoretical results are in good agreement with the experiment results.

关 键 词：车辆工程 泡沫铝填充 矩形薄壁梁 压溃理论 

分 类 号：U461.91[机械工程—车辆工程]