摘要
采用LS-DYNA有限元模拟分析对比,讨论了不同冲击速度和不同冲击方向下正六边形蜂窝结构的的变形机制和吸能特性.结果表明:中低速情况下,X2方向下整个变形整体以塑性弯曲和堆叠为主较为复杂无序,X1方向下变形模式相对稳定,高速情况下两者变形都主要体现为惯性.关于吸能的比较,相同速度下,X2方向的吸能特性要优于X1方向;不同速度下,无论哪个方向的能量吸收都伴随速度的提高而增大.
Taking the hexagonal honeycomb material member as the research object and using LS-DYNA finite element simulation analysis, the deformation mechanism and energy absorption characteristics of honeycomb structures under different impact velocities and different impact directions are discussed.The results show that under the condition of medium-low speed, the whole deformation in the X2 direction is mainly complex and disordered by plastic bending and stacking, and the deformation mode is relatively stable in the X1 direction.At high-speed, both deformations are mainly manifested by inertial effects. Regarding the comparison of energy absorption, at the same speed, the energy absorption characteristic in the X2 direction is superior to the X1 direction, At different speeds, energy absorption in any direction will increase with speed.
作者
杨家伦
胡俊
Yang Jialun;Hu Jun(School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China)
出处
《湖南文理学院学报（自然科学版）》
CAS
2019年第4期58-63,共6页
Journal of Hunan University of Arts and Science(Science and Technology)
基金
国家自然科学基金(51778003)
安徽省教育厅高校自然科学研究重点项目(KJ2017A486)
关键词
正六边形蜂窝
不同冲击方向
变形模式
吸能特性
hexagonal honeycomb
different impact directions
deformation mode
energy absorption characteristics
