摘要
基于ANSYS有限元分析软件,采用“生死单元”法对304不锈钢激光填粉焊接接头的温度场进行了仿真。利用间接耦合法将温度场结果作为施加载荷,对激光填粉焊接的应力场进行模拟计算,并和钻孔法测量的焊缝接头残余应力进行对比。结果表明,模拟的焊缝温度场变化符合激光加工温度梯度大的特点;焊接接头残余应力主要分布在焊缝处,符合激光焊接热影响区小的特点;模拟得到的沿焊缝方向和垂直于焊缝方向的第一主应力变化趋势和试验测得的结果基本一致。
Based on ANSYS finite element analysis software, the temperature field of 304 stainless steel laser powder filling welding joint was simulated by using the life-and-death element method. The indirect coupling method was used to simulate the stress field with the temperature field result as the applied load during the laser powder filling welding. And the results were compared with the residual stress measured by drilling method. The results show that the variation of simulated weld temperature field is in line with the characteristics of large temperature gradient in laser processing. And the residual stress of the welded joint is mainly distributed in the weld seam, which is in line with the characteristics of small heat affected zone of laser welding. Besides, the changing trend of the first principal stress along and vertical to the weld direction by simulation is basically consistent with the measured results.
作者
姜慧玲
彭笑雨
鞠恒
张佳斌
林成新
JIANG Huiling;PENG Xiaoyu;JU Heng;ZHANG Jiabin;LIN Chengxin(Naval Architecture and Ocean Engineering College,Dalian Maritime University,Dalian 116026,China)
出处
《热加工工艺》
北大核心
2022年第9期130-136,共7页
Hot Working Technology
基金
极地船舶冬装化技术与装备研究项目(226000/017193017)。
关键词
激光填粉焊接
残余应力
数值模拟
laser powder filling welding
residual stress
numerical simulation
