Finite element analysis of welding temperature field and stress field of S355 steel

DUAN Weijun; DENG Hongjian; CHEN Beiping; QIU Peixian; CHEN Jingqing

doi:10.7512/j.issn.1001-2303.2021.02.05

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Finite element analysis of welding temperature field and stress field of S355 steel
Vol. 51, Issue 2, Pages: 31-36(2021)
DOI： 10.7512/j.issn.1001-2303.2021.02.05

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DUAN Weijun, DENG Hongjian, CHEN Beiping, et al. Finite element analysis of welding temperature field and stress field of S355 steel. [J]. 51(2):31-36(2021)
DOI：

DUAN Weijun, DENG Hongjian, CHEN Beiping, et al. Finite element analysis of welding temperature field and stress field of S355 steel. [J]. 51(2):31-36(2021) DOI： 10.7512/j.issn.1001-2303.2021.02.05.

摘要

S355钢作为低合金钢,在焊接过程中会伴随着固态相变现象。在考虑S355钢的固态相变效应基础上,建立了焊接过程的热弹塑性有限元模型。通过引入相变转变模型、相变塑性和相变体积模型,计算获得焊后组织分布云图,并分析了焊缝和热影响区典型节点的组织演变规律。结果表明,与不考虑固态相变效应相比,紧邻焊缝两侧的热影响区的Mises应力大幅降低,计算得到的残余应力值与实测值吻合较好。

Abstract

S355 steel is a low alloy steel,which is accompanied by solid phase transformation during welding. Based on the solid phase transformation effect of S355 steel,a thermal-stress finite element model of welding process was established.The microstructure evolution law in the weld and heat affected zone was analyzed. The results show that under the effect of solid phase transformation,the Mises stress of the weld decreased. The residual stress and deformation evolution curves of the heat affected zone with and without phase transformation were compared. The calculated residual stress was in good agreement with the measured value.