Prediction of peen forming stress and plate deformation with a combined method

Abstract

To simulate the deformations of the strip peen formed plate more realistic, and using low computational resources, a strategy combining analytical and finite element methods is proposed in this article. First, the internal stresses in the target induced by single shot impact are calculated with expanding cavity model. Second, the stress field of single shot impact is used to derive the stress field of multiple shot impacts by considering the overlaps of adjacent shot impacts. Third, the calculated stress field is introduced to the finite element model to obtain the resultant shape of the plate. The shot dimple distribution in reality is detected and fitted with normal distribution function. The random distribution of the positions of shot impacts is involved in the simulation to make the simulation more realistic. In the finite element model, the plate is modeled with shell element to reduce the demand of the computational resources. The simulated shapes of the plate under different peen forming parameters are compared with the scanned three-dimensional experimental shapes with the same forming parameters. The comparison shows that the simulated shapes are in good agreement with the experiments.

Numerical simulation of post-weld shot peening using combined discrete and finite element methods (DEM-FEM)

“…Additionally, it was determined that the roughness increases sharply in the early stage of the SP until the coverage reaches 20%, then became saturated at higher coverage. Xiao et al 17 the stresses and deformation produced by the peen forming using the FEM based on single and multiple impacts. The resulting stresses were computed using the combination of analytical and FE simulation methods.…”

Study on surface properties and fatigue performance of aluminum alloy plate with prestressed ultrasonic peening

“…The plate is subjected to elastic strain during the prebending process, which enlarges the bending deformation and the compressive residual stress compared to that in free UP. 3,4 The effects of forming parameters on the bending behavior, 5 residual stress, 6 and fatigue behavior 7 were analyzed. Dutta 8 studied the mechanism of the grain refinement induced by UP process.…”

“…The effects of forming parameters on the bending behavior, 5 residual stress, 6 and fatigue behavior 7 were analyzed. Dutta 8 studied the mechanism of the grain refinement induced by UP process.…”

Efficient planning of peen-forming patterns via artificial neural networks

“…Predictive models are crucial to predict the outcome of a planned peening pattern. Different modelling approaches have been proposed for peen forming [3,4,5]. Notably, Faucheux et al [6] proposed the bilayer framework.…”