Numerical analysis of single particle impact in the context of Cold Spray: A new adhesion model

P. Profizi, A. Combescure, K. Ogawa

研究成果: Conference article査読

4 被引用数 (Scopus)

抄録

A new adhesion model for numerical simulation of single particle impact in the context of Cold Spray is introduced. As in other studies, cohesive forces are put between the particle and substrate to account for adhesion. In this study however, the forces are put only when a local physical criterion is met. The physical phenomenon most often attributed to Cold Spray adhesion is a shear stress instability. The Johnson-Cook material law is used with a shear damage softening law to enable strong localization at the interface without the need for an extremely fine mesh. This localization is then detected as a drop in local yield stress value by the algorithm, which then implements a local cohesive force. The evolution of this cohesive force is defined by an energy dissipative cohesive model, using a surface adhesion energy as a material parameter. Each cohesive link is broken once all its associated surface energy is dissipated. A criterion on the damage value is also used to break a cohesive bond prematurely, to account for the effect of erosion at higher speeds. This model is found to reproduce the Cold Spray-like adhesion behavior with observed critical and maximum speeds.

本文言語English
論文番号012062
ジャーナルIOP Conference Series: Earth and Environmental Science
32
1
DOI
出版ステータスPublished - 2016 4月 19
イベント2nd International Conference on Advances in Renewable Energy and Technologies, ICARET 2016 - Putrajaya, Malaysia
継続期間: 2016 2月 232016 2月 25

ASJC Scopus subject areas

  • 環境科学(全般)
  • 地球惑星科学(全般)

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