引用本文: 李凯, 朱建生, 钱志博, 董树南, 倪添. 基于J-C本构模型的Comp.B炸药落锤冲击数值模拟[J]. 力学与实践, 2011, 33(1): 21-23.
NUMERICAL SIMULATION OF DROP WEIGHT IMPACT TESTS FOR COMP.B USING JOHNSON-COOK CONSTITUTIVE MODEL[J]. MECHANICS IN ENGINEERING, 2011, 33(1): 21-23.
 Citation: NUMERICAL SIMULATION OF DROP WEIGHT IMPACT TESTS FOR COMP.B USING JOHNSON-COOK CONSTITUTIVE MODEL[J]. MECHANICS IN ENGINEERING, 2011, 33(1): 21-23.

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

• 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.

Abstract: The high-mass (400\,kg) drop weight impact tests for noignition Comp.B were numerically simulated by using the Johnson-Cookconstitutive model, to investigate the mechanical responsecharacteristics of Comp.B in inertial impact. \sigma -t curves ofnumerical simulation with EOS and without EOS were obtained at differentcharge conditions. The main mechanical parameters are compared, such as peakstress, stress rise time, etc., The results of Johnson-Cookconstitutive model with EOS agree better with experiments.This model can be used to simulate the mechanical response characteristicsof explosive in inertial impact.

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