NUMERICAL SIMULATION OF THE LOW PLASTICITY BURNISHING PROCESS FOR FATIGUE PROPERTY ENHANCEMENT

摘要

Low Plasticity Burnishing (LPB) process introduces a deep layer of high-compression material through an application of a smooth, free-rolling ball moving in a single pass parallel to the material surface. This paper describes modelling the LPB process numerically using two- and three-dimensional finite element method, and reports the results of parametric studies. The residual stress distributions, as well as the total and in-plane plastic strains obtained from the numerical calculations, are compared to the published results of residual stress measurements. In addition, the preliminary results of the finite element modelling of residual stress relaxations caused by the elevated temperatures are also reported.