Numerical thermo-mechanical study of elastic-plastic interaction of differently sized copper microparticles at high velocity

Abstract

High-velocity interaction between particles and nonflat surfaces is relevant to processes occurring in additive manufacturing technologies such as cold spray. The study of the behavior of the material during a high-velocity collision is needed to understand the full-scale process. The paper addresses the normal contact interaction between spherical particles as well as spherical surfaces at a velocity as high as 400 m/s. The problem is approached by numerical simulation applying the finite element method using strain, strain-rate, and temperature-dependent plasticity model. The focus of this report is to show the contribution of colliding particle radii to the interaction parameters. The results include contact duration, contact surface area, displacement, heat energy, stress, and strain rate.