Influence of compressive stress on stress intensity factor of hole-edge crack by high strain rate laser shock processing

The 2D weight function was integrated with slice synthesis model in order to probe into the influence of compressive stress by high strain rate laser shock processing on stress intensity factor of 3D non-through hole-edge crack. The influence of compressive stress by laser shock of high strain rate on stress intensity factor was deduced by means of slice synthesis model from the calculation of 3D crack tip stress intensity factor. It is applicable to obtain the stress intensity factor at each point at the surface crack front. According to the computational solution, the stress intensity factor subjecting to the modification of impact zone was smaller than that without modification when the inhibiting effect was imposed by the laser shock plastic zone on the crack development. The experiment aims to probe into the influence of high power, short pulse laser shock on the stress intensity factor of crack tip in metal plastic deformation zone by focusing on the inhibiting effect of residual stress produced on the crack development in the plastic zone.