Features of Finite Element Modeling of Residual Stresses Arising in Material under Laser Shock-Wave Processing Using the Intrinsic Deformations Method

摘要

Laser shock-wave processing of materials is a modern technology for effective processing of metallic materials. In the near-surface region, the processing produces significant compressive residual stresses that contribute to increasing material strength and improving their tribological and operational characteristics. In this work, we performed finite element modeling of the laser shock-wave technology using the intrinsic deformation method. Specifically, using the intrinsic deformation method, we first solved the dynamic problem on the impact of a shock load and determined the distribution of stabilized plastic deformations (so-called “intrinsic deformations”) and then solved the static problem on the elastic response of the system to the intrinsic deformations induced into it. The level of the resulting compressive residual stresses arising upon laser shock-wave processing is determined. The obtained results correlated well with the known experimental data.