Computational fatigue analysis of the Almen strip treated with double-sided shot peening and its experimental verification

The current research on shot peening of metal surfaces is mainly concentrated in the field of single-sided shot peening, and fewer researchers have conducted in-depth studies on the mechanism of double-sided shot peening. In this paper, the influence of different shot peening parameters on the fatigue life of double-sided shot peening of SAE1070 alloy steel is investigated, and at the same time, a fatigue life prediction model after double-sided shot peening of metal surfaces is established innovatively. Firstly, the DE-FE (discrete element-finite element) random multi-shot analysis mode is used to simulate the double-sided shot peening processing of AE1070 alloy steel using different shot peening parameters, respectively, and then, the model after shot peening is imported into fe-safe software for fatigue simulation test, and the same conditions are used to carry out the double-sided shot peening test on the specimen pieces of SAE1070, and then, the fatigue life test is carried out for the shot peening processed parts. The simulation results are compared with the test results. It can be found through the results that double-sided shot peening can effectively improve the comprehensive mechanical properties of SAE1070 alloy steel and increase its fatigue life. The effect of different strengths of shot peening varies significantly, and the optimal shot peening effect is achieved by the optimized shot peening parameters. The simulation and test results are more consistent, indicating that the established fatigue life prediction model can predict the fatigue life results more accurately.