表面技术Issue(2)：134-138,187,6.DOI:10.16490/j.cnki.issn.1001-3660.2016.02.021
喷丸强化AZ91 D镁合金残余应力场的数值模拟及实验研究
Numerical Simulation and Experimental Study of Residual Stress Field of AZ91 D Magnesium Alloy by Shot Peening
摘要
Abstract
Objective To study the impact of the shot peening process on surface residual stress field of AZ91D magnesium al-loy. Methods This paper established a finite element model of shot peening AZ91D magnesium alloy based on finite element plat-form and discussed the influence of pellet shot velocity, shot pellet diameter and incidence angle on the surface residual stress field of AZ91D magnesium alloy mainly from the aspects of the compressive residual stress layer thickness, the compressive residual stress peak and the depth of compressive residual stress peak. Besides, results of shot peening test and finite element simulation were compared. Results The compressive residual stress layer thickness and compressive residual stress peak increased significantly with the increase of shot velocity, but the increase of shot velocity had little influence on the depth of compressive residual stress. The compressive residual stress layer thickness, the compressive residual stress peak and the depth of compressive residual stress peak increased significantly with the increase of shot pellet diameter. By increasing the incidence angle, the compressive residual stress layer thickness and the compressive residual stress peak increased significantly, but the depth of the compressive residual stress peak value basically remained unchanged. The compressive residual stress layer thickness of finite element simulation was 7% smaller than the test results, the compressive residual stress of finite element simulation was 5% higher than the test results, and the depth of compressive residual stress of finite element simulation was 11% smaller than the test results. Conclusion Residu-al stress test results have good consistency with finite element simulation results, verifying the validity of the finite element model.关键词
喷丸/AZ91 D镁合金/有限元模拟/残余应力场Key words
shot peening/AZ91D magnesium alloy/finite element simulation/residual stress field分类
矿业与冶金引用本文复制引用
陈光忠,何志坚,杨岳..喷丸强化AZ91 D镁合金残余应力场的数值模拟及实验研究[J].表面技术,2016,(2):134-138,187,6.基金项目
湖南省科技厅研究课题(2013FJ3019) （2013FJ3019）
湖南省教育厅研究课题(14C0825) Fund：Supported by the Department of Science & Technology of Hunan Province(2013FJ3019) and the Department of Education of Hunan Province (14C0825) （14C0825）
