摘要
利用有限元分析技术对7075铝合金激光焊接过程进行动态模拟,在对激光焊接温度场进行数值模拟的基础上,分析了铝合金薄板的残余应力及变形。结果表明:焊后纵向残余应力占主导地位,其最大值约为368 MPa;而横向残余应力相对小得多,其最大值为52 MPa;焊后焊接件的残余变形似反马鞍状。采用纳米压痕法检测7075铝合金激光焊接的残余应力,将模拟结果与实测数据进行对比分析,结果显示模拟结果与实测值吻合良好。
Based on the finite element analysis technology,the distributions of temperature field,residual stress and deformation during laser welding of 7075 aluminum plates were dynamically simulated.The results show that the longitudinal residual stress,whose maximum value is 368MPa,is much bigger that transverse residual stress with a maximum of 52MPa.The residual deformation after welding looks like reverse saddle.The residual stress of aluminum plates for laser welding was investigated by nanoindentation.By comparative analysis,the calculation results are in good agreement with measured data.
出处
《热加工工艺》
CSCD
北大核心
2013年第21期200-203,共4页
Hot Working Technology
基金
重庆市教委科技项目(KJ121601)
关键词
铝合金
激光焊接
数值模拟
残余应力
aluminum alloy
laser welding
numerical simulation
residual stress
作者简介
作者简介：卢艳（1977-），女，四川成都人，副教授，博士，主要研究方向：先进制造技术，信号处理与分析；电话：13098763375；E-mail：loisyan@163．com.
