The conditions of laser-driven shock wave loading leads to study the dynamic fracture in an unusual range of stress and strain rates : 0.2-2 Mbar and more than 107s-1. A cumulative damage criteria for spallation process has been included in a one-dimensional finite difference hydrodynamic code. This program correctly fits spallation experiments on aluminum targets of various thicknesses irradiated by 2 ns laser pulse of 1012W/cm2 incident intensity
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