摘要
以有限元分析软件ABAQUS为平台,利用用户子程序编制了单面和双面激光喷丸时冲击波压力的加载程序,建立了小孔试样双面激光喷丸过程诱导残余应力的有限元分析模型。分析了小孔对激光喷丸强化效果的影响,研究了单面和双面激光喷丸下ZK60镁合金小孔试样的三维残余应力场分布。结果表明,采用双面激光喷丸工艺时,在试样上下表面均产生有益的残余压应力分布,下表面残余压应力的幅值是单面激光喷丸时的2倍左右。将典型实验与模拟结果进行对比,其一致性较好。
The finite element analysis（FEA） softeware ABAQUS is applied to establish the finite element model（FEM） for one-side and both-side laser shot peening（LSP） of specimen with a central hole.User subroutine VDLOAD is used to program the loading model of shock wave pressure for both-side LSP.The influence of the hole on the peening effect is investigated,and the three-dimensional（3D） residual stress distribution of ZK60 magnesium alloy after one-side and both-side LSP is analyzed.The beneficial residual stress distribution was obtained after both-side LSP,with a stress value as two times high as that after one-side LSP on the bottom surface.The experimental results are compared with numerical simulation results and good consistency is observed.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2010年第7期1850-1855,共6页
Chinese Journal of Lasers
基金
国家自然科学基金(50675090)
国家自然科学基金重点项目(50735001)
江苏省"青蓝工程"项目(2008)
镇江市工业支撑科技项目(SGY20090026)
江苏大学研究生创新基金(1291110037)资助课题
关键词
激光技术
双面激光喷丸
有限元法
残余应力
镁合金
laser technique
both-side laser shot peening
finite element analysis
residual stress
magnesium alloy
