Q235 Sheet Welding Deformation Analysis of the Experiment and Simulation

ZHAO Qi; CHENG Jiahao; JIAO Chuanjia; WANG Qiang; CHENG Shibang; ZHONG Zhicheng

doi:10.7512/j.issn.1001-2303.2023.06.12

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Q235 Sheet Welding Deformation Analysis of the Experiment and Simulation
Vol. 53, Issue 6, Pages: 76-82(2023)
DOI： 10.7512/j.issn.1001-2303.2023.06.12

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赵琦，程家豪，焦传佳，等.Q235薄板焊接变形的试验研究与模拟分析［J］.电焊机，2023，53（6）：76-82.

ZHAO Qi, CHENG Jiahao, JIAO Chuanjia, et al.Q235 Sheet Welding Deformation Analysis of the Experiment and Simulation[J].Electric Welding Machine, 2023, 53(6): 76-82.
赵琦，程家豪，焦传佳，等.Q235薄板焊接变形的试验研究与模拟分析［J］.电焊机，2023，53（6）：76-82. DOI： 10.7512/j.issn.1001-2303.2023.06.12.

ZHAO Qi, CHENG Jiahao, JIAO Chuanjia, et al.Q235 Sheet Welding Deformation Analysis of the Experiment and Simulation[J].Electric Welding Machine, 2023, 53(6): 76-82. DOI： 10.7512/j.issn.1001-2303.2023.06.12.

摘要

为了获取薄板焊接中瞬态变形过程规律，以及试件尺寸对焊后变形的影响规律，基于三维光学面扫描测量系统，分析了Q235薄板焊接中的焊缝区域及关键点的瞬态变形过程。根据试验测试对建立的有限元模型进行修正，采用开发的有限元模型详细讨论了试件尺寸对Q235薄板焊接面外变形的影响规律及产生机理。对比修正后的有限元模型分析与实验测试结果一致，通过仿真模拟得到：在薄板长度一定时，随着板宽度的增加，纵向弯曲程度降低，角变形变化不明显；在薄板宽度一定时，随着板长度的增加，纵向弯曲程度和角变形均增加。试板长宽比对焊缝纵向塑性应变的大小和分布的作用范围影响不大，对焊缝横向应变分布范围和大小有较大影响。该研究为工业生产中判断及降低焊后变形提供有效指导。

Abstract

In order to obtain the rule of transient deformation process in thin plate welding and the influence of specimen size on the deformation after welding. Based on the three-dimensional optical surface scanning measurement system, the transient deformation process of weld area and key points in Q235 sheet welding was analyzed. According to the test, the finite element model was modified, and the influence law and mechanism of specimen size on the out-of-plane welding deformation of Q235 thin plate were discussed in detail by using the developed finite element model. The analysis of the modified finite element model is consistent with the experimental test results. The simulation results show that when the thin plate length is fixed, the longitudinal bending degree decreases with the increase of the width of the plate, and the change of the Angle deformation is not obvious. When the width of the thin plate is constant, the longitudinal bending degree and angular deformation increase with the increase of the length of the plate. The ratio of length to width of the test plate has little influence on the size and distribution of the longitudinal plastic strain of the weld, but has great influence on the transverse strain distribution range and size of the weld. This study provides effective guidance for judging and reducing post-welding deformation in industrial production.

关键词

三维光学面扫描测量系统薄板焊接变形有限元仿真机理

Keywords

three-dimensional optical surface scanning measurement systemthin platewelding deformationfinite element simulationmechanism

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