Numerical simulation of damage evolution on mechanical behavior and tensile spallation of pure aluminium under laser shock loading

By using a modified damage function model in which the dynamic failure of shocked matter was analogous to a percolation process and a stress release function which was proposed to describe the void coalescence behavior based on the percolation critical theory, the mechanical behavior and spallation of pure aluminum subjected to intense laser irradiation were studied. The laser-driven shock loading was a Gaussian pressure pulse applied at the front surface of the sample. Simulation results indicate that the mechanical response and the wave propagation strongly depend on the damage evolution, which fits the experimental observations very well, which confirms the capability of the damage function model for describing the damage evolution in ductile metals. The damage evolution and damage dist