吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (6): 1863-1868.doi: 10.13229/j.cnki.jdxbgxb201506020
邹猛, 于用军, 张荣荣, 魏灿刚, 王会霞
ZOU Meng, YU Yong-jun, ZHANG Rong-rong, WEI Can-gang, WANG Hui-xia
摘要: 为了提高薄壁金属管的耐撞性能,通过相似性分析,选择牛角作为生物原型。提取出决定牛角耐撞性能的结构特征参数,并应用到薄壁管的设计中,从而设计出一种具有牛角结构特征的仿生管。应用非线性有限元法对仿生管的变形模式和能量吸收进行了仿真分析,并与四晶胞锥管和普通圆锥管进行了对比,结果表明:在轴向碰撞时,仿生管的变形模式为渐进叠缩稳态变形,其比吸能为46.2 kJ/kg,分别比四晶胞锥管和普通锥管的比吸能提高了1.3和1.8倍,仿生管的耐撞性能随着芯体壁厚的增加而提高;在横向碰撞时,与四晶胞锥管和普通圆锥管相比,仿生管具有较高的耐撞性能,其比吸能为10.4 kJ/kg。将牛角结构特征应用到薄壁管的设计中,可以有效提高薄壁管的耐撞性能,为车辆吸能元件的研发提供参考。
中图分类号:
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