Simulation of Stress Wave Propagation in Constrained Explosives Based upon a Spectral-Element Method

Stress wave propagation in the constrained explosive under shock loading was studied through simulation for the needs of both housing explosive stability in high-speed missiles and the security of weapons during accidents.The resistance forces of both missiles and housing explosive during the progress of penetration were calculated with different penetration velocities.A high-precision and low-dissipation spectral-element method was used to simulate the stress wave propagation in explosives under shock loading for the first time.The temperature rise caused by friction on the charge-shell interface was calculated with consideration of the friction property, and the plastic energy was also computed.The spectral-element method is successfully applied in the simulation of the stress wave propagation in constrained explosive, and the results can provide a reference to the analysis of housing explosive.