A combined finite/discrete element simulation of shot peening processes - Part I: studies on 2D interaction laws

In the first part of this series of papers on the combined finite/discrete element simulation of shot peening processes, different contact interaction laws for 2D cases are extensively studied with special attention given to the proper selection of the parameter values involved, which is one of the key issues for successful direct simulation. In addition, computational iss ues including contact forces, partial contact, energy dissipation, and rheo logical representation are addressed. Numerical examples for a single shot impact system simulated by the coupled finite/discrete element method using different interaction laws are provided to verify the proposed approaches. The results are also compared with those obtained by using only finite ele ment methods. Findings obtained by performing 2D simulations will, in the s ubsequent article, be used in realistic computational simulations of 3D sho t peening processes.