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

P. Profizi, A. Combescure, K. Ogawa

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number012062
JournalIOP Conference Series: Earth and Environmental Science
Volume32
Issue number1
DOIs
Publication statusPublished - 2016 Apr 19
Event2nd International Conference on Advances in Renewable Energy and Technologies, ICARET 2016 - Putrajaya, Malaysia
Duration: 2016 Feb 232016 Feb 25

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

Fingerprint Dive into the research topics of 'Numerical analysis of single particle impact in the context of Cold Spray: A new adhesion model'. Together they form a unique fingerprint.

Cite this