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

doi:10.3901/JME.2019.06.011

Abstract

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

CLC Number:

TG404

LU Shijie, ZHENG Qiao, ZHANG Chaohua, WANG Yifeng, DENG Dean. 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[J]. Journal of Mechanical Engineering, 2019, 55(6): 11-22.

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