Numerical simulation study on spraying particle deposition of helicopter fuselage for cold spray repair

Cold spray is a high-speed solid-state spray technology widely used in the fields of material surface repair, coating enhancement, and repair. In battlefield environments, using this method can achieve rapid repair of battle-damaged helicopters. In this study, a finite element model of the interaction between cold spray particles and substrates was established using the commercial nonlinear dynamics software Abaqus for repairing helicopter structures with the cold spray method. This model dynamically simulated the mechanical properties of the interaction between cold spray particles and substrates, studied the deposition repair mechanism of cold spray particles, and analyzed the effects of changes in particle velocity on particle deposition characteristics. This provides a theoretical basis for improving the quality and efficiency of helicopter repairs using cold spray technology.