NUMERICAL ANALYSIS OF PLANE EXPLOSIVE WAVE PROPAGATION WITH ITS ATTENUATION BEHAVIOR IN SEMI-INFINITE MEDIUM

The propagation process of explosive wave under uniaxial strain conditions in semi-infinite concrete is simulated by LS-DYNA software.The attenuation laws of plane explosive wave with the time-space in concrete are obtained based on the Johnson-Holmquist-Cook constitute model(JHC) for concrete.The material crushing performance due to the damage evolution formed in the concrete under blast loading is also presented.The fitted curves of the simulation results indicate that the amplitudes of stress waves adjacent to blast sources decrease significantly.It shows that the damage evolution of material is related to the attenuation of the stress wave amplitude.Numerical results will provide reference for the design of blasting and protective projects.