Liu Chuan, Wang Chunjing, Cheng Xiaohua, Yan Yi, Yang Jiawei, Guo Yuhang
Provincial Key Lab of Advanced Welding Technology, Jiangsu University of Science and Technology, Zhenjiang 212003, China.
China Nuclear Industry Huaxing Construction Company Limited, Nanjing 21000, China.
Materials (Basel). 2018 Apr 20;11(4):633. doi: 10.3390/ma11040633.
The stress distributions in a thick welded specimen with a partial repair weld were measured with the three-cut contour method. The longitudinal stress maps in the original weld and the repair weld were obtained and the transverse stress map at the weld centerline in the original weld was acquired. The difference between the longitudinal stress in the partial repair weld and that in the original weld was investigated. Results show that the longitudinal stress increases significantly within the entire repair region with a peak tensile longitudinal stress close to the yield strength of weld material; and the longitudinal stress in the region above the repair weld decreases distinctly after repair; the introduction of the partial repair weld does not affect the stress distribution trend in the original weld (whether it is beyond or above the repair weld), and it has a slight effect on the tensile stress distribution width in the repair region.
采用三切口轮廓法测量了带有局部补焊的厚焊接试件中的应力分布。获得了原始焊缝和补焊焊缝中的纵向应力图，并获取了原始焊缝中焊缝中心线处的横向应力图。研究了局部补焊焊缝与原始焊缝中纵向应力的差异。结果表明，在整个补焊区域内纵向应力显著增加，峰值拉伸纵向应力接近焊缝材料的屈服强度；补焊后补焊焊缝上方区域的纵向应力明显降低；局部补焊焊缝的引入不影响原始焊缝（无论是在补焊焊缝之外还是上方）中的应力分布趋势，且对补焊区域内拉伸应力分布宽度有轻微影响。
