ANALYSIS OF DISTRIBUTIONS OF RESIDUAL STRESS AND STRAIN BENEATH A NOTCH AFTER ROLLING

The fatigue property of the notched part can be improved significantly by introducingcompressive residual stress resulting from surface plastic deformation at the notch.Theresidual stress and strain distributions beneath the notch is predicted by using finite elementmethed (FEM) of large strain elasto-plastic analysis in this paper.It is investigatedwheather the rolling process could be replaced by a plane-strain indenting with a model inthe analysis.The effects of material strength.notch radius r.and indentation and depth Δhon the distribution of residual stress and strain are discussed.The agreement of predictedand experimental results is good enough.