激光技术Issue(2)：201-204,4.DOI:10.7510/jgjs.issn.1001-3806.2014.02.012
激光喷丸范围对小孔构件残余应力场的影响
Effect of laser peening area on residual stress field in small-hole specimens
摘要
Abstract
To investigate the effect of different laser peening area on the residual stress field in a hole specimen of 7075-T7451 aluminum alloy , the process of laser peening and residual stress distribution of the hole specimen were simulated by finite element analysis software ABAQUS .The results show that both the compressive stress of surface residual and the tensile stress of unshocked area increase as laser peening area becomes bigger ,the tensile stress of unshocked area changes from 52MPa to 344MPa.The residual stress distribution along inner hole wall turns out to be worse with the increase of laser peening area , the value of the worst stress along the hole inner wall changes from the compressive stress 38MPa to the tensile stress 49MPa.Within a certain range of laser peening area , the increase of laser peening area enlarges surface compressive stress coverage and makes residual stress distribution of inner hole wall worse .For laser peening of a hole specimen , it is important to control laser peening area and the surface residual stress distribution along hole inner wall , in order to improve the fatigue resistance .关键词
激光技术/喷丸范围/残余应力/小孔构件Key words
laser technique/laser peening area/residual stress/hole specimen分类
矿业与冶金引用本文复制引用
姜银方,丁报,程志军,李娟,潘禹,金华,王春辉..激光喷丸范围对小孔构件残余应力场的影响[J].激光技术,2014,(2):201-204,4.基金项目
国家自然科学基金资助项目 （）
