大尺度锤头冲击下固支方板的动响应分析

甘霖 伍星星 王海坤 刘建湖 赵延杰

甘霖, 伍星星, 王海坤, 刘建湖, 赵延杰. 大尺度锤头冲击下固支方板的动响应分析[J]. 高压物理学报, 2021, 35(6): 064103. doi: 10.11858/gywlxb.20210733
引用本文: 甘霖, 伍星星, 王海坤, 刘建湖, 赵延杰. 大尺度锤头冲击下固支方板的动响应分析[J]. 高压物理学报, 2021, 35(6): 064103. doi: 10.11858/gywlxb.20210733
 GAN  Lin, WU Xingxing, WANG Haikun, LIU Jianhu, ZHAO Yanjie. Dynamical Response Behavior of Clamped Square Plates under the Impact of Large-Scale Hammer[J]. Chinese Journal of High Pressure Physics, 2021, 35(6): 064103. doi: 10.11858/gywlxb.20210733
Citation:  GAN  Lin, WU Xingxing, WANG Haikun, LIU Jianhu, ZHAO Yanjie. Dynamical Response Behavior of Clamped Square Plates under the Impact of Large-Scale Hammer[J]. Chinese Journal of High Pressure Physics, 2021, 35(6): 064103. doi: 10.11858/gywlxb.20210733

大尺度锤头冲击下固支方板的动响应分析

doi: 10.11858/gywlxb.20210733
基金项目: 国防基础科研重点项目(B0820132045);国家重点安全基础研究项目(613279)
详细信息
    作者简介:

    甘 霖(2000-),男,本科,主要从事交通安全研究. E-mail:ganlin1230620@163.com

  • 中图分类号: O346

Dynamical Response Behavior of Clamped Square Plates under the Impact of Large-Scale Hammer

  • 摘要: 为探究大尺度锤头冲击下固支方板的动响应行为,结合落锤工装设计了大尺度冲击锤头,通过对固支方板开展不同冲击强度下的撞击试验,获取了固支方板在大尺度锤头撞击下的典型破坏模式。同时依据试验结果及冲击动力学理论,建立了大尺度锤头冲击下固支方板变形评估方法,并结合数值模拟建立了大尺度锤头冲击下方板边界撕裂判据。研究结果表明:大尺度锤头冲击下固支方板主要依靠边界塑性铰、面板内塑性铰耗能,固支方板的撕裂从边界位置开始。基于塑性铰耗能机制建立了方板塑性变形理论评估方法,理论计算结果与试验结果吻合较好。固支方板撕裂过程中,边界起始撕裂处应力三轴度基本在0.6左右,本试验中建立的临界失效判据Bh值可取1.6倍板厚。所建立的评估方法及失效判据进一步完善了落锤冲击下固支方板的动响应行为研究。

     

  • 图  落锤试验装置示意图

    Figure  1.  Schematic diagram of the drop hammer test device

    图  冲击锤头模型示意图(单位:mm)

    Figure  2.  Dimension of impact hammer head model (Unit: mm)

    图  方板的典型破坏模式

    Figure  3.  Typical failure modes of square plates

    图  矩形板的塑性铰线和横向速度场

    Figure  4.  Plastic hinge and transverse velocity distribution of square plates

    图  Q345B钢在不同应变率下的应力-应变曲线

    Figure  5.  Stress-strain curves of Q345B steel under different strain rates

    图  锤头撞击方板计算模型及提取单元示意图

    Figure  6.  Simulation model of the square plate under hammer impacting and the selected element

    图  Q345B钢材料试验结果及提取单元所处应力

    Figure  7.  Test results of Q345B steel material and the stress of the selected element

    图  典型固支方板计算模型示意图

    Figure  8.  Typical numerical simulation models of the clamped square plates

    图  计算结果

    Figure  9.  Calculation results

    表  1  试验工况及试验结果

    Table  1.   Experiment cases and test results

    Case
    h/m
    v/(m·s−1)
    M/kg
    E/kJ
    Result
    D/mmDamage
    10.42.802 024 7.93439.3Plastic deformation
    20.53.132 024 9.91745.9Boundary tearing
    30.63.422 02411.90148.6Boundary tearing
    40.73.702 02413.88455.8Boundary tearing
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-03-08
  • 修回日期:  2021-03-26

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