Abstract Scope |
Cold spray has attracted interest in coating and additive manufacturing techniques, in which high-velocity solid particles impinge and adhere to substrates. It is challenging for common numerical techniques to correctly model the deposition without interfacial adhesion. In this study, a new numerical approach based on peridynamics (PD) was developed to incorporate interfacial interactions as a part of the constitutive model to capture deformation, bonding, and rebound of impacting particles in one unified framework. Two models were proposed to characterize adhesive contact, the Lenard-Johns-type potential and the force-stretch relationship directly derived from the fracture properties of the bulk material. The deformation behaviors simulated by the PD-based method were found to compare well with those from benchmark finite element method simulations. Furthermore, this PD-based approach allowed flexible realizations of different deposition scenarios through a tunable adhesion parameter. This method provides a framework for more realistic cold spray impact simulations. |