Study on welding crack sensitivity assessment method based on thermal elastic plastic finite element analysis
Study on welding crack sensitivity assessment method based on thermal elastic plastic finite element analysis
复制标题
DOI：
10.1080/15376494.2022.2038741
复制
发表时间：
2022-02
影响因子：
2.8
通讯作者：
Ziliang Li;Ye Zhu;Meng-Qi Li;Yufeng Luo
中科院分区：
文献类型：
--
作者：
Ziliang Li;Ye Zhu;Meng-Qi Li;Yufeng Luo
提出了一种新的以等效塑性应变增量为指标的焊接裂纹敏感性评定方法，并通过不同焊接条件下的焊缝板对接接头的计算结果与试验结果的对比，验证了该方法的可靠性。并将该方法应用于桥梁修复工程中多道接头的焊接裂纹敏感性评估。结果表明，等效塑性应变增量随热输入和约束程度的增大而增大，随预热温度的升高而减小。当量塑性应变增量可作为评定焊接裂纹敏感性的指标。对于多道焊接接头，焊接裂纹敏感性随着焊接道次数的增加而降低，表现为当量塑性应变增量。本文提出的焊接裂纹敏感性评定方法是可靠的，可为焊接接头性能评定提供实用工具。
Abstract This study presents a new welding crack sensitivity assessment method with the equivalent plastic strain increment as an indicator, and the reliability is verified by comparing the computed results and experimental results of bead-on-plate joint under different welding conditions. Then the proposed method is applied to assess the welding crack sensitivity of multi-pass joints in the bridge rehabilitation engineering. The results show that the equivalent plastic strain increment increases with increasing heat input and constraint degree, and decreases with increasing preheat temperature. The equivalent plastic strain increment can be used as an indicator for assessing welding crack sensitivity assessment of joints. With regard to multi-pass welded joints, the welding crack sensitivity decreases with the increase of number of weld passes in terms of equivalent plastic strain increment. The welding crack sensitivity assessment method proposed in this study is reliable and can provide a practical tool for assessing the performance of welded joints.