冲击载荷下分层梯度泡沫材料中的应力波传播特性

赵转 李世强 刘志芳

赵转, 李世强, 刘志芳. 冲击载荷下分层梯度泡沫材料中的应力波传播特性[J]. 高压物理学报, 2019, 33(6): 064102. doi: 10.11858/gywlxb.20190724
引用本文: 赵转, 李世强, 刘志芳. 冲击载荷下分层梯度泡沫材料中的应力波传播特性[J]. 高压物理学报, 2019, 33(6): 064102. doi: 10.11858/gywlxb.20190724
ZHAO Zhuan, LI Shiqiang, LIU Zhifang. Stress Waves Propagation in Layered Graded CellularMaterials under Dynamic Crush Loading[J]. Chinese Journal of High Pressure Physics, 2019, 33(6): 064102. doi: 10.11858/gywlxb.20190724
Citation: ZHAO Zhuan, LI Shiqiang, LIU Zhifang. Stress Waves Propagation in Layered Graded CellularMaterials under Dynamic Crush Loading[J]. Chinese Journal of High Pressure Physics, 2019, 33(6): 064102. doi: 10.11858/gywlxb.20190724

冲击载荷下分层梯度泡沫材料中的应力波传播特性

doi: 10.11858/gywlxb.20190724
基金项目: 国家自然科学基金(11602161,11772216);山西省自然科学基金(201601D021025)
详细信息
    作者简介:

    赵 转(1984-),女,硕士,讲师,主要从事冲击动力学研究. E-mail:zhaozhuan001@163.com

    通讯作者:

    李世强(1986-),男,博士,讲师,主要从事冲击动力学、爆炸力学研究. E-mail:lishiqiang@tyut.edu.cn

  • 中图分类号: O347

Stress Waves Propagation in Layered Graded CellularMaterials under Dynamic Crush Loading

  • 摘要: 以一维应力波传播理论为基础,建立了3层金属泡沫材料受到刚性块撞击时的理论模型,研究了刚性块撞击3层泡沫圆杆时的动力响应过程,从理论上给出了刚性块在撞击过程中的速度衰减规律数值解。利用ANSYS/LS-DYNA分析了受刚性块撞击时塑性应力波在3层泡沫材料中的传播过程,比较了刚性块以及层间界面处节点速度的变化规律。通过对比有限元结果与理论结果发现:理论模型能够较好地预测冲击载荷下分层泡沫材料各界面的速度衰减规律;3层梯度泡沫材料比相同质量的单层均质泡沫材料具有更加高效的吸能和缓冲能力。由于理论假设忽略了反射波以及泡沫材料应变硬化效应的影响,理论解与有限元模拟结果之间存在一定的误差。

     

  • 图  刚性质量块撞击一端固定的3层泡沫材料

    Figure  1.  Impact of a rigid mass against a triple-layered foam material

    图  3层泡沫铝圆杆受刚性块撞击的有限元模型及3种Cymat泡沫铝压缩应力-应变曲线

    Figure  2.  Triple layer foam rod impacted by a rigid mass and stress-strain curves of three Cymat foam

    图  各节点速度变化规律对比

    Figure  3.  Comparison of velocity profiles

    表  1  泡沫杆参数

    Table  1.   Parameters of the foam rod

    L1/mmL2/mmL3/mm${\rho _{01}}$/(kg·m–3)${\rho _{02}}$/(kg·m–3)${\rho _{03}}$/(kg·m–3)
    304060570410253
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-01-29
  • 修回日期:  2019-02-21

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