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为研究双相型S22053不锈钢角焊缝连接的承载性能,对不锈钢母材和焊缝金属圆棒试样进行材性试验,分别获得了母材和焊缝金属材料的本构关系;对不锈钢正面和侧面角焊缝连接试件进行拉伸试验,测得试件极限承载力和焊缝变形发展情况;利用ANSYS有限元软件对不锈钢角焊缝连接试件单向拉伸试验进行了非线性有限元模拟,并将试验结果与模拟结果进行了对比。对比结果表明,考虑不锈钢母材和焊缝金属本构关系差异并使用材料真实应力-应变曲线的有限元模型能有效模拟角焊缝连接承载性能拉伸试验。最后,利用经试验验证的有限元模型对角焊缝承载力影响因素进行了参数分析,并将有限元模拟值与按照美国规范SEI/ASCE 8-02、欧洲规范EN1993-1-4,以及中国不锈钢结构技术规程CECS 410:2015计算求得的规范设计值进行了对比,得出了承载力模拟值与各国规范设计值的比值,可为不锈钢设计规范的完善和工程应用提供参考。
In order to study the bearing performance of fillet weld joints of dual-phase S22053 stainless steel, the stainless steel base metal and the weld metal round bar samples were tested for their material properties, and the constitutive relations of the base metal and the weld metal material were obtained respectively. And the side fillet weld joint tensile test, measured the ultimate bearing capacity of the specimen and the deformation of the weld development; using ANSYS finite element software for stainless steel fillet weld joint specimens uniaxial tensile test was limited Meta-simulation, and the test results and simulation results were compared. The comparison results show that the finite element model considering the difference of the constitutive relationship between the stainless steel base metal and the weld metal and using the real stress-strain curve of the material can effectively simulate the tensile test of fillet weld joint load-bearing performance. Finally, the parameters of the influencing factors on the bearing capacity of fillet welds were analyzed by the experimental verification of the finite element model, and the simulation results were compared with those obtained according to the American Standard SEI / ASCE 8-02, European Standard EN1993-1-4, The comparison between the standard design values calculated by the CECS 410: 2015 Technical Specification for Stainless Steel Structures and the ratio between the simulation values of the bearing capacity and the normative design values of different countries have been obtained. It can provide a reference for the design of stainless steel and the application of engineering design.