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

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.σ-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.