A Simple Method for Estimate Critical Velocity of Cold Spraying Via SP

Abstract

This study used the SPH method in Abaqus/Explicit to simulate different powders' cold spraying collision deposition processes, which proposed the deformation coefficient Y between the depth of the foundation pit and the size of powders after deformation determine the critical velocity of powders. The results show that different powders have different critical velocities. The Y value of powders with different properties is in a specific range or unique value, which is feasible to predict the critical velocity of cold spraying; compared with the results of previous studies, the accuracy is high. The research results have specific guiding significance for enriching the determination method of critical velocity of cold spraying.