首页|覆材厚度对不锈钢复合板焊接接头应力应变影响的数值模拟分析

覆材厚度对不锈钢复合板焊接接头应力应变影响的数值模拟分析

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采用钨极气体保护焊(gas tungsten arc welding,GTAW)制备了基材厚度为 13 mm,覆材厚度分别为 0.3,1.0,2.0 mm的 304/Q355复合板焊接接头.采用数值模拟法,分析了覆材厚度对 304/Q355复合板焊接接头应力应变的影响,揭示了不同覆材厚度的不锈钢复合板焊接过程中残余应力及应变的演变特征.结果表明,随着覆材厚度的增加,304/Q355复合板焊接接头截面区最大残余应力逐渐减小,残余应力区宽度逐渐增大,在基层焊缝向过渡层焊缝焊接过程中,应力集中区逐渐向过渡层焊缝区收缩,最高应力集中区均位于过渡层焊缝区,最大应力接近材料屈服强度.焊后变形量随覆材厚度的增加而增大,覆材厚度 2.0 mm的复合板变形量比覆材厚度 0.3 mm的复合板变形量大约2 mm,变形最大的方向为焊缝厚度方向.
Numerical simulation of the influence of thickness of clad-ding material on stress and strain of welded joint of stain-less steel composite plate
GTAW technology has been used to fabricate wel-ded connections on composite plates consisting of 304 and Q355 materials.Base material thickness was 13 mm,while cladding material thicknesses ranged from 0.3 mm to 2.0 mm.The influence of different thicknesses of cladding material on the stress and strain of 304/Q355 composite plate welded joint was analyzed by numerical simulation method,and the evolu-tion characteristics of residual stress and strain during welding of stainless steel composite plate with different thicknesses of cladding material were revealed.The results show that the X-ray diffraction test results are in good agreement with the nu-merical simulation results.With the increase of the thickness of the cladding material,the maximum residual stress value of the welded joint section of 304/Q355 composite plate gradu-ally decreases,and the width of the residual stress zone gradu-ally increases.During the welding process from the base weld to the transition weld,the stress concentration zone gradually shrinks to the transition weld zone.Finally,the highest stress concentration area is located in the weld zone of the transition layer,and the maximum stress value is close to the yield strength of the material.In addition,the deformation after welding increases with the increase of the thickness of the clad-ding material,and the deformation of the composite plate with the thickness of the cladding material 2.0 mm is about 2 mm higher than that of the composite plate with the thickness of the cladding material 0.3 mm,and the direction of the largest de-formation is the direction of the weld thickness.

cladding materials thicknesscomposite platestress and strainnumerical simulation

冯玉兰、吴志生、孙智宇

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太原科技大学,太原, 030024

覆材厚度 复合板 应力应变 数值模拟

国家重点研发计划项目山西省重点研发计划项目山西省重点研发计划项目山西省青年科学基金项目海安太原理工大学研究院2023 开放研发项目太原科技大学研究生教育创新项目

2018YFA07073052021020502010012021 01120401008201901D2112912023HA-TYUT KFYF012BY 2022005

2024

10.12073/j.hjxb.20230606001

焊接学报
中国机械工程学会　中国机械工程学会焊接学会　机械科学研究院哈尔滨焊接研究所

焊接学报

CSTPCD北大核心
影响因子：0.815
ISSN：0253-360X
年,卷(期)：2024.45(1)
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