According to the characteristics of shot peening process

a three-dimensional finite element model was established by using ABAQUS finite element software to simulate the residual stress field. Based on this model

the effects of shot parameters such as velocity

diameter and shot number on residual stress field of Al-Li alloy were studied respectively. Then the distributions of the residual stress field of single shot model

uniform array shots model and random shot model were compared. Furthermore

the residual stress distribution in Al-Li alloy specimen thickness direction was measured by using X-ray residual stress analyzer and electrolytic polishing method. The depth of residual stress layer is 0.24mm. The maximum residual stress occurs at the depth of 0.08mm. It verifies the validity of the finite element model.