• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2019, Vol. 55 ›› Issue (6): 11-22.doi: 10.3901/JME.2019.06.011

• 特邀专栏:焊接力学与结构设计 • 上一篇    下一篇

不同有限元软件对Q390钢厚板T型接头焊接残余应力和变形预测精度与计算效率的比较

逯世杰, 郑乔, 张超华, 王义峰, 邓德安   

  1. 重庆大学材料科学与工程学院 重庆 400044
  • 收稿日期:2018-04-27 修回日期:2018-08-01 出版日期:2019-03-20 发布日期:2019-03-20
  • 通讯作者: 邓德安(通信作者),男,1968年出生,博士,教授,博士研究生导师。主要研究方向为焊接残余应力理论预测、焊接变形的数值模拟和焊接过程中热-冶金-力学耦合行为。E-mail:deandeng@cqu.edu.cn
  • 作者简介:逯世杰,男,1991年出生。主要研究方向为焊接数值模拟和金属材料焊接。E-mail:1035652974@qq.com
  • 基金资助:
    国家自然科学基金(51275544)和重庆市研究生科研创新(CYB18003)资助项目。

A Comparative Study on Computational Accuracy and Efficiency of Welding Residual Stress and Deformation in a Q390 Steel Thick Plate T Joint among Three Kinds of Different FEM Software

LU Shijie, ZHENG Qiao, ZHANG Chaohua, WANG Yifeng, DENG Dean   

  1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044
  • Received:2018-04-27 Revised:2018-08-01 Online:2019-03-20 Published:2019-03-20

摘要: 以Q390高强钢厚板多层多道焊T型接头为研究对象,分别基于ABAQUS、MARC和SYSWELD三款不同的有限元软件平台,开发“热-弹-塑性有限元方法”模拟接头的焊接温度场、残余应力与焊接变形。采用理论方法检验三种数值模拟软件在计算焊接温度场时的热量损失情况。结果表明,通过ABAQUS软件进行多层多道焊温度场的计算时,在后续焊道单元的添加和激活过程中,会造成热量的损失,对此提出了相应的解决方案;另外两个软件对焊接温度场的计算不存在热量损失问题。同时,采用试验方法实测接头的焊接残余应力和焊接变形。通过对比数值模拟结果与试验结果可知,三种不同的数值模拟软件对焊接残余应力都有较高的预测精度。对于焊接变形,ABAQUS的预测精度最高,然而计算时间最长;MARC次之,与ABAQUS相比计算效率提高了55%;SYSWELD对多层多道焊焊接变形的预测精度相对较差,但其计算效率最高,与ABAQUS相比效率提高了66%。为充分利用各个软件的优势进行焊接数值模拟的研究提供了较好的借鉴和参考价值。

关键词: 焊接变形, 焊接残余应力, 计算效率, 软件比较, 预测精度

Abstract: Thermal-elastic-plastic finite element computational approaches are developed based on three kinds of different finite element method (FEM) software, namely ABAQUS, MARC and SYSWELD, and the welding temperature field, residual stress and welding deformation of a tick-plate Q390 steel T-joint are simulated. The heat loss of three kinds of numerical analysis software in the calculation of welding temperature field is tested by theoretical method. The results show that when the temperature field of multi-pass welding is calculated by ABAQUS software, the heat loss will be caused during the adding and activation of the following weld beads. There is no heat loss problem in the calculation of welding temperature field by the other two kinds of software. In the current study, the welding residual stress and welding deformation of the T-joint are measured by experiment. Based on the comparison between the simulation results and the experimental measurements, we can know that three different kinds of software all have sufficient accuracy to model the welding residual stress. For welding deformation, ABAQUS has the highest prediction accuracy, but its calculation time is the longest. MARC takes the second place, with 55% improvement in computational efficiency compared to ABAQUS. SYSWELD has a relatively poor prediction accuracy for welding deformation of multi-pass welded joint, but its calculation efficiency is the highest, with a 66% increase compared to ABAQUS. The results obtained by the present study would be of meaningful reference value for the study of welding numerical simulation by making full use of the advantages of various kinds of software.

Key words: computational efficiency, deformation, prediction accuracy, residual stress, software comparison

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