Examination on the Calculation Method for Modeling the Multi-Particle Impact Process in Cold Spraying
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JTTEE5 19:1032–1041 DOI: 10.1007/s11666-010-9489-9 1059-9630/$19.00 ASM International
Examination on the Calculation Method for Modeling the Multi-Particle Impact Process in Cold Spraying Shuo Yin, Xiao-fang Wang, Bao-peng Xu, and Wen-ya Li (Submitted December 12, 2009; in revised form January 28, 2010) In this study, a systematic examination on multi-particle impact process in cold spraying was conducted for copper material by using different methods including Lagrangian method, Eulerian method, and smoothed particle hydrodynamics (SPH) method. It is found that for the Lagrangian method, the meshing size and the element type significantly affect the resultant output. Moreover, the particle deformation behavior calculated by Eulerian method is more comparable to the experimental observation than that by Lagrangian method. Further study on the multi-particle impact process also demonstrates that Eulerian method is superior to Lagrangian method. In addition, the preliminary investigation on the mesh-free-based SPH method shows that this technique can provide a relatively reasonable result in the particle deformation behavior and the weight of the independent SPH particle exerts limited effects on the resultant output. Furthermore, owing to the meshfree feature and the appropriate solution to the contact interface, SPH method can also be employed to simulate the multiparticle impact process in cold spraying.
Keywords
cold spraying (CS), copper particle, Eulerian method, multi-particle impact, numerical simulation, smoothed particle hydrodynamics (SPH) method
1. Introduction Cold spraying (CS) is a new coating technology based on aerodynamics and high-speed impact dynamics. Differing from that of the conventional thermal spraying, the deposition process of CS relies purely on kinetic energy rather than the combination of thermal and kinetic energies of spray particles. In this process, spray particles (typically
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