An analysis of residual stresses and strains in shot peening

Journal article

The beneficial effect of shot peening on fatigue resistance of structural alloys is well documented and widely used in industry to improve component life. It is perhaps the most widely used technique which relies on the introduction of residual stresses into the component by direct mechanical means. The resulting stress states are usually evaluated experimentally by X-ray diffraction or other stress measurement techniques. In order for shot peening operations to be effective and reliable, the process of introducing residual stresses and strains into peened components must be not only controlled, but also predictable and quantifiable. The present paper is aimed at developing a framework for such predictive modelling. Plastic deformation of material's surface layer taking place during shot peening of a thin plate is simulated using the concept of eigenstrain. Flexible plate theory is applied to the analysis of stresses and deformation. The results are relevant to the analysis of shot peening and peen forming operations.

Authors: Korsunsky, A

• Publication status: Published
• Peer review status: Peer reviewed
• Language: English
• Subjects: Engineering & allied sciences