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力学与实践 ›› 2011, Vol. 33 ›› Issue (1): 21-23.doi: 10.6052/1000-0879-lxysj2010-294

• 应用研究 • 上一篇    下一篇

基于J-C本构模型的Comp.B炸药落锤冲击数值模拟

李凯1,朱建生2,钱志博3,董树南4,倪添3   

  1. 1. 西北工业大学航海学院
    2. 解放军炮兵学院
    3. 西北工业大学翼型、叶栅空气动力学国防科技重点实验室
    4.
  • 收稿日期:2010-07-12 修回日期:2010-12-08 出版日期:2011-02-15 发布日期:2011-03-03
  • 通讯作者: 李凯 E-mail:leeaoe@sina.com

NUMERICAL SIMULATION OF DROP WEIGHT IMPACT TESTS FOR COMP.B USING JOHNSON-COOK CONSTITUTIVE MODEL

  • Received:2010-07-12 Revised:2010-12-08 Online:2011-02-15 Published:2011-03-03
  • Contact: Kai Li E-mail:leeaoe@sina.com

摘要: 为研究Comp.B炸药在惯性冲击下的力学响应特性, 基于Johnson-Cook本构模型, 对 点火前的Comp.B炸药大落锤(400kg)冲击实验进行了数值模拟. 在不同应力加载条件下模 拟计算得到了用状态方程和不用状态方程的$\sigma$-$t$曲线, 对比应力峰值、应 力上升时间等主要力学参数, 结果表明考虑了状态方程的数值模 拟结果与实验吻合最好, 可以很好地模拟炸药惯性冲击下的力学响应.

关键词: 落锤冲击实验

Abstract: The high-mass (400\,kg) drop weight impact tests for no ignition Comp.B were numerically simulated by using the Johnson-Cook constitutive model, to investigate the mechanical response characteristics of Comp.B in inertial impact. $\sigma $-$t$ curves of numerical simulation with EOS and without EOS were obtained at different charge conditions. The main mechanical parameters are compared, such as peak stress, stress rise time, etc., The results of Johnson-Cook constitutive model with EOS agree better with experiments. This model can be used to simulate the mechanical response characteristics of explosive in inertial impact.

Key words: Drop weight impact tests