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Date of Publication:2022-10-04

Journal:爆炸与冲击

Issue:5

Page Number:546-550

ISSN No.:1001-1455

Abstract:Copper particle impact behaviors in cold spraying were numerically simulated by using the LS-DYNA program. Some important aspects on the 3D modeling were examined. Effects of the meshing size on particle critical velocity and particle deformation were also investigated. The results show that the contours of the deformed particle obtained by the 3D model are more comparable to the experimental observation than the previous 2D simulated results. The distortion of the solid element at the contact zone in the 3D model is much weaker than the surface element used in the 2D model. Therefore, no steep increase of effective plastic strain of elements can be observed during the impact process. Furthermore, the meshing size also takes an important role in the 3D simulated results. The critical velocity, flattening ratio and compression ratio obtained by extrapolation methods are in good agreement with the experimental results.

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