摘要
研究了高速冲击下组合薄壁结构的吸能特性。采用显式动力有限元方法模拟薄壁结构在轴向冲击下的动态屈曲并分析其吸能特性,通过在结构上增加诱导缺陷和提出新型组合截面来提高其抗冲击吸能性能。同时对多种模型对比分析,研究了不同诱导缺陷、截面形式对吸能特性的影响,以得到最优化的结构。
The energy absorption performance of extruded aluminum tube with multi-cell profiles was evaluated in virtue of computer simulation. Several tube specimens, on which multiform triggering holes were introduced, were investigated via observation of deformation modes and repulsive forces. Strain rates of materials were taken into account in the present anlysis considering the high-speed impact. Comparison of different specimens show that multi-cell profiles can improve energy absorption performance and triggering holes can decrease crushing forces, and that the energy absorptions of the multi-cell profile tubes increase with the corner numbers in the constant profile areas.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2006年第5期395-403,共9页
Explosion and Shock Waves
基金
国家博士后基金项目(2004035193)
关键词
固体力学
吸能
冲击
薄壁结构
诱导缺陷
solid mechanics
energy absorption
Thin-shell
impact
triggering hole
