文章摘要
欧阳昊,成伟.蜂窝铝的面内动态冲击有限元研究[J].包装工程,2015,36(7):16-20.
OUYANG Hao,CHENG Wei.In-plane Dynamic Impact Behavior of Aluminum Honeycombs Based on Finite Element Simulation[J].Packaging Engineering,2015,36(7):16-20.
蜂窝铝的面内动态冲击有限元研究
In-plane Dynamic Impact Behavior of Aluminum Honeycombs Based on Finite Element Simulation
投稿时间:2014-09-20  修订日期:2015-04-10
DOI:
中文关键词: 双壁厚蜂窝铝  面内冲击  变形模式  平台应力
英文关键词: double-walled aluminum honeycombs  in-plane impact  deformation mode  plateau stress
基金项目:
作者单位
欧阳昊 中国工程物理研究院绵阳 621900 
成伟 中国工程物理研究院绵阳 621900 
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中文摘要:
      目的 研究双壁厚蜂窝铝的面内动态冲击力学行为。方法 利用Ansys/LS-DYNA有限元软件, 建 立双壁厚蜂窝铝有限元模型, 分析蜂窝铝壁厚和冲击速度对蜂窝铝面内变形模式和平台应力的影响。 结果 随着冲击速度的增大, 在蜂窝铝的压缩方向上观测到3种变形模式, 获得了变形模式转换的临界 速度, 并给出了临界速度与厚跨比的关系式。计算了不同冲击速度和厚跨比下蜂窝铝的平台应力。结 论 变形模式对平台应力有很大的影响, 不同的变形模式下呈现不同的规律: 准静态模式时, 平台应力与 冲击速度无关; 过渡模式和冲击模式时, 平台应力随着冲击速度 v的增大而增大, 分别与 v 1.5和 v2成线性 关系。根据有限元结果, 拟合得到了不同的变形模式下平台应力与冲击速度的经验公式。
英文摘要:
      The aim of this work was to study the in-plane dynamic impact behavior of double-walled aluminum honeycombs. The finite element model of double-walled aluminum honeycombs was established by Ansys/LS-DYNA. The influences of honeycomb cell wall thickness and impact velocity on the deformation mode and the plateau stress were analyzed. Three deformation modes were observed in the compressed direction with the increasing impact velocities. The transition velocities of deformation modes were obtained and the formula between critical velocities and height-to-width ratios were suggested. The dynamic plateau stresses of aluminum honeycombs were calculated with different height-to-width ratios at different impact velocities. The deformation mode had a great influence on the plateau stress which presented different variations at different deformation modes. In quasi-static mode, the plateau stresses had nothing to do with impact velocities. However, in transition mode and dynamic mode, the plateau stresses increased linearly with increasing v1.5 and v2, respectively. The empirical formulas between plateau stress and impact velocity were given at different deformation modes according to the finite element simulation results.
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