Numerical Simulation and Optimization of Shot Peening Process Parameters

喷丸強化处理工艺參數之數值模擬和優化研究

朱仁勝(Ren-Sheng Zhu) ； 趙紅玲(Hong-Ling Zhao) ； 趙韓(Han Zhao) ； 張月(Yue Zhang) ； 彭繼友(Ji-You Peng)

《中國機械工程學刊》 39卷2期 (2018/04) Pp. 163-170

摘要

In this paper, a finite-element (FE) model of shot peening (SP) process is developed for multiple shot impacts on 304 stainless steel sheet by using LS-DYNA code. The model is partially validated by experiments using single shot. Then numerical simulations of multiple shot impacts are performed and the residual stress profiles below the target surface are investigated so that the effects of shot velocity, radius and yield strength of shot material on averaged residual stress profiles are obtained. Finally, the FE model is applied to optimization of SP process parameters by determining the optimal regression equation with the maximum compressive residual stress as function of shot velocity, radius and yield strength by means of stepwise regression analysis. The optimal model proposed is practical for engineers.

關鍵字

finite element ； residual stress ； shot peening ； numerical simulation

並列摘要

本文運用ANSYS/LS-DYNA 工具建立了304 不銹鋼的多彈丸噴丸有限元模型，並且用單彈丸實驗資料進行了部分驗證。研究了在不同噴丸工藝參數（彈丸的速度、半徑和強度）下，經過噴丸處理的304 不銹鋼板材殘餘應力場。最後，對模擬結果採用逐步回歸分析法建立了殘餘應力關於工藝參數的最優回歸模型，據此可根據所需的最大殘餘應力要求確定最佳工藝參數。所得模型具有實際指導意義。