摘要
构建了不同角度单层内凹蜂窝圆柱壳模型,提出了一种新型多层复合内凹蜂窝圆柱壳结构。利用有限元仿真方法研究了单层和多层内凹蜂窝圆柱壳在轴向冲击下的变形行为,分析对比了单层和多层内凹蜂窝圆柱壳在不同冲击速度下的平台应力和比吸能特性。结果表明,在相同密度和尺寸下,多层内凹蜂窝圆柱壳的冲击能量吸收能力相对于单层内凹蜂窝圆柱壳有显著提升;内凹蜂窝圆柱壳初始变形破坏位置随着冲击速度的改变而改变;多层内凹蜂窝圆柱壳没有表现出负泊松比性质。
The single layer re-entrant honeycomb cylindrical shell with different angles is established in this paper.Based on the single layer re-entrant honeycomb cylindrical shell with different angles,a novel composite re-entrant honeycomb cylindrical shell is proposed.The deformation behavior of single and multi-layer re-entrant honeycomb cylindrical shells under axial impact was studied by numerical simulation.By comparing and analyzing the plateau stress and specific energy absorption of single and multi-layer re-entrant honeycomb cylindrical shells under different impact velocities.The following conclusions can be obtained:compared with the single-layer re-entrant honeycomb cylindrical shell,the energy absorption capacity of the multi-layer re-entrant honeycomb cylindrical shell is significantly improved under the same density and size.The deformation position of re-entrant honeycomb cylindrical shell is changed with different impact velocities.The multi-layer re-entrant honeycomb cylindrical shell doesn′t show negative Poisson's ratio.
作者
马南芳
邓庆田
李新波
宋学力
MA NanFang;DENG QingTian;LI XinBo;SONG XueLi(School of Science,Chang′an University,Xi′an 710064,China)
出处
《机械强度》
CAS
CSCD
北大核心
2023年第2期423-429,共7页
Journal of Mechanical Strength
基金
中央高校基本科研业务费专项资金(310812163504)资助。
关键词
内凹蜂窝
复合材料
圆柱壳
冲击速度
能量吸收
Re-entrant honeycomb
Composite material
Cylindrical shell
Impact velocities
Energy absorption
