基于ANSYS软件的异种高强钢焊接接头温度场和应力场的模拟  

Simulation of Temperature and Stress Fields in Dissimilar High-strength Steel Welded Joint Based on ANSYS Software

作　　者：艾铭杰 AI Mingjie(Shandong Aotai Electric Co.,Ltd.,Jinan 250000,Shandong China)

机构地区：[1]山东奥太电气有限公司,山东济南250000

出　　处：《热处理》2023年第3期12-17,共6页Heat Treatment

基　　金：山东省重点研发计划(2020CXGC010207)。

摘　　要：焊接过程中,焊接热输入及焊后的快速冷却使焊缝及其附近区域产生不均匀的温度分布从而产生残余应力。采用ANSYS有限元软件对Q890和Q960钢焊接接头的温度场和应力场进行了数值模拟。结果表明:焊接过程中焊缝区及熔合区温度极高,焊件纵向的温度梯度较小,横向的温度梯度较大;采用MK·GHS-70焊丝焊接的Q890与Q960钢焊接接头的残余应力较大,Q890钢侧与焊缝根部相接的熔合区附近的残余应力最大,开裂倾向较大;模拟的焊后残余应力分布与焊件的开裂部位相吻合。In the process of welding,weld and area near it will exhibit nonuniform temperature distribution and thereby residual stress because of welding heat input and post-welding rapid cooling.The temperature and stress fields in a joint fabricated by welding Q890 steel to Q960 steel were numerically simulated with the use of ANSYS finite element software.The results indicated that(a)temperature in the weld and fusion areas was extremely high during the welding,and the weldment offered smaller temperature gradient in longitudinal direction and lager temperature gradient in transverse direction;(b)the joint of Q890 and Q960 steels that was welded by MK·GHS-70 wire had larger residual stress,and the residual stress was the largest near the fusion area where Q890 steel side meets the weld base,thereby is very easy to crack;and(c)the simulated distribution of post-weld residual stress was consistent with the cracking position of the weldment.

关 键 词：ANSYS软件 焊接 有限元 残余应力 温度场 

分 类 号：TG404[金属学及工艺—焊接] TP273[自动化与计算机技术—检测技术与自动化装置]