摘要
基于SYSWELD有限元软件,开发了热-弹-塑性非线性有限元计算方法。利用所开发的计算方法,模拟大型结构升船机轮毂与轮辐的焊接温度场和残余应力分布。轮毂与轮辐焊接时,由于焊缝为环状,焊接起始、结束位置存在明显的热端部效应。计算结果表明,焊缝周向残余应力的峰值达到480 MPa,高于材料的屈服强度;径向残余应力沿板厚方向呈现出"拉-压-拉"三层分布,并且高应力区主要分布于焊缝及其热影响区附近。此外,径向残余应力峰值达到350 MPa,低于周向残余应力。
Based on SYSWELD finite element software,a thermal elastic plastic nolinear finite element method was developed to simulate welding temperature field and residual stress distribution in hub and spoke of a large structure ship lift.Because the weld is circularity,when the hub and spoke are welded,there is a significant thermal end effect in the weld start region.The results show that the peak value of hoop residual stress in weld is 480 MPa,which is above yield strength of material.Meanwhile,the radial residual stress appears"tensile-compressive-tensile"three-layer distribution along thickness direction.Higher stress is distributed in the weld and heat affected zone.Furthermore,the peak value of radial residual stress is350 MPa,which is below hoop residual stress.
作者
陶恒林
韩烈彪
赵浩
郑乔
TAO Henglin;HAN Liebiao;ZHAO Hao;ZHENG Qiao(China Ge Zhou Ba Group Machinery&Ship Co.,Ltd.,Yichang 443002,China;College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China)
出处
《热加工工艺》
北大核心
2020年第17期150-154,共5页
Hot Working Technology
关键词
升船机
焊接残余应力
数值模拟
ship lift
welding residual stress
numerical simulation
