Finite-element simulation of residual stresses induced by laser shock peening in TC4 samples structurally similar to a turbine blade.

This article explores the use of laser shock peening (LSP) to enhance the fatigue life of turbine blades in the aerospace industry. LSP involves applying high-energy laser pulses to a metal surface, creating compressive residual stress in the subsurface layer. The article presents numerical simulation models that examine the effects of LSP on turbine blades, including the propagation of elastic-plastic waves and the formation of residual stress. The study also investigates the impact of peening parameters such as laser intensity and spot size on the distribution of residual stress. Experimental tests and finite element simulations were conducted on TC4 titanium alloy samples, similar in structure to turbine blades, confirming the effectiveness of LSP in inducing compressive residual stresses. The study was supported by the Government of Perm Krai and the Ministry of Education and Science of Russia. [Extracted from the article]