摘要
采用ABAQUS有限元分析软件,建立了一种"焊接+激光冲击强化(LSP)"应力分布模型,研究了不同能量LSP对316L不锈钢氩弧焊焊缝区域应力分布及应变的影响。研究结果表明,由该模型模拟得到的残余应力分布与试验结果一致。LSP在焊缝区域表面诱导出残余压应力层,消除了焊接热影响引起的残余拉应力;随着激光脉冲能量的增大,激光冲击诱导的残余压应力以及压应力层厚度增加,但增加幅度减小;焊接件表面应变峰值随着激光脉冲能量的增加而增大。
A stress distribution model of ＂ welding ＋ laser shock peening （LSP）＂ is established by using the ABAQUS finite element analysis software, and the effect of LSP with different pulse energies on the stress distribution and strain in the welding zones of 316L stainless steels processed by the argon-arc welding is studied. The study results show that the residual stress distribution simulated by this model is similar to the experimental result. LSP can induce a residual compressive stress layer in the welding zone to eliminate the residual tensile stress induced by the welding thermal influence. With the increase of laser pulse energy, the residual compressive stress and the depth of residual compressive stress layer increase, but the increase becomes smaller. The peak value of strain on the weldment surface increases with the increase of laser pulse energy.
出处
《激光与光电子学进展》
CSCD
北大核心
2017年第10期330-337,共8页
Laser & Optoelectronics Progress
基金
国家自然科学基金(51575242)
中国博士后特别资助基金(2015T80504)
江苏省自然科学基金(BK20140012
BK20151341
BE2016148)
江苏省"六大人才高峰"高层次人才项目(2014ZBZZ015)
江苏省高校自然科学基金(14KJA460002)
关键词
激光技术
激光冲击强化
有限元分析
氩弧焊
残余应力分布
应变
laser technique
laser shock peening
finite element analysis
argon-arc welding
residual stress distribution
strain
