Multiple Particle Impact Analysis of Cold Sprayed Particles Using Smoothed Particle Hydrodynamics Method

The critical, maximum and the optimum velocity of a single cold sprayed  (CS) particle can be estimated using the smoothed particle hydrodynamics method (SPH). The contact surfaces of the particle and substrate is modeled as intersurface forces using the cohesive zone model. The application of the SPH method permits simulation of the CS process without the use of mesh and thus avoids the disadvantages of traditional numerical method in handling large deformations. In this study, the effect of multiple particle impact of cold sprayed particles on the critical, maximum and optimum velocity is investigated by evaluating the adhesion and rebound energy. Impact of multiple particles results in an overall increase in the energy ratio which indicates the particles' increased tendency to rebound. Increasing the number of particles did not contribute to adhesion which demonstrates that it is relatively easier to form a bonding with splat than it is with coating.