Detection and Evaluation of Welded Joints of Steel Structures with Defects

doi:10.3901/JME.2021.24.223

Abstract

Abstract: Due to the welding heat process, the welded joints tend to have deterioration of structural properties, large welding residual stress, stress concentration and various welding defects. The evaluation of the safety of the welded joints with defects has important engineering application value for ensuring the safe use of the welded structure. Based on the existing methods for detecting defects in defective joints and the method of regularized characterization of defects according to BS 7910, the level of failure assessment diagram in BS 7910 and the types of stresses and correction factors involved in the determination of the coordinates of the evaluation points of defective joints are introduced. Reference is provided for the selection of defect detection methods, the processing of regularized characterization of defects, the selection of failure assessment diagram level, and the determination of the evaluation point coordinates for the actual evaluation of the welded joints by BS 7910.

Key words: defect detection, BS 7910, regularized characterization of defects, failure assessment diagram

CLC Number:

TG441

XIE Qi, WANG Na, YANG Yajing, DUAN Bin, MA Dezhi, YOU Yiliang, WU Sujun. Detection and Evaluation of Welded Joints of Steel Structures with Defects[J]. Journal of Mechanical Engineering, 2021, 57(24): 223-232.

References

[1] 张新斌,蒋晓东,施哲雄. 基于BS 7910的含焊接缺陷管道的评定方法[J]. 北京石油化工学院学报,2005,2(13):37-41. ZHANG Xinbin,JIANG Xiaodong,SHI Zhexiong. Evaluation method of pipes containing welding defects based on BS 7910[J]. Journal of Beijing Institute of Petrochemical Technology,2005,2(13):37-41.
[2] 宋天民. 焊接接头无损检测[M].北京:中国石化出版社,2013. SONG Tianmin. Nondestructive testing of welded joints. Beijing:China Petrochemical Press,2013.
[3] 孙正. 基于图像的焊接缺陷提取与识别方法研究[D]. 徐州:中国矿业大学,2010. SUN Zheng. Study on image-based extraction and recognition of welding defects[D]. Xuzhou:China University of Mining & Technology,2010.
[4] 艾海舟,苏延超. 图像处理、分析与机器视觉[M].北京:清华大学出版社,2011. AI Haizhou,SU Yanchao. Image processing,analysis,and machine vision[M]. Beijing:Tsinghua University Press,2011.
[5] DOWLING N E. Mechanical behavior of materials[M].2nd ed. New Jersey:Prentice Hall,Upper Saddle River,1998.
[6] MILNE I. The importance of the management of structure integrity[J]. Engineering Failure Analysis,1994,1(3):171-181.
[7] SMITH E. Normalised effective K versus Lr failure assessment diagrams as applied to a flaw in the vicinity of a stress concentration[J]. International Journal. Engineering Science,2000,38:1153-1159.
[8] 王炳英,霍立兴,张玉凤,等. 基于BS 7910含缺陷X80钢焊接管道的安全评定[J]. 机械强度,2012,34(4):621-624. WANG Bingying,HUO Lixing,ZHANG Yufeng,et al. Safety assessment of defective X80 steel welded pipe based on BS 7910[J]. Mechanical Strength,2012,34(4):621-624.
[9] British Standards Institution. BS 7910-2013:Guide to methods for assessing the acceptability of flaws in metallic structures[S]. London:British Standards Institution,2013.
[10] 邵彩元. 焊接结构件无损检测技术的现状金额发展深析[J]. 中国石油和化工标准与质量,2017,37(12):39-40. SHAO Caiyun. Present situation and development of nondestructive testing technology for welded structural parts[J]. China Petroleum and Chemical Industry Standards and Quality,2017,37(12):39-40.
[11] 李少波,杨静,王铮,等. 缺陷检测技术的发展与应用研究综述[J]. 自动化学报,2020(11):2319-2336. LI Shaobo,YANG Jing,WANG Zheng,et al. Review of the development and application of defect detection technology[J]. Acta Automatica Sinica,2020(11):2319-2336.
[12] 李晔,吴志生,李砚峰,等. 基于X射线图像的焊接接头缺陷提取和识别方法综述[J]. 热加工工艺,2018,47(19):6-10. LI Ye,WU Zhisheng,LI Yanfeng,et al. Overview of defect extraction and identification methods for welded joints based on X-ray images[J]. Hot Working Technology,2018,47(19):6-10.
[13] 王学平."T"形焊接接头中未焊透缺陷的超声波检测[J]. 中国新技术新产品,2018,12(4):7-8. WANG Xueping. Ultrasonic inspection of incomplete penetration defects in "T" shaped welded joints[J]. China New Technology and New Products,2018,12(4):7-8.
[14] 王宾,荆洪阳,任晓波. 平面型缺陷断裂评定的BS 7910标准简介[J]. 压力容器,2006,8(23):7-11. WANG Bin,JING Hongyang,REN Xiaobo. Introduction to BS 7910 standard for flat defect fracture evaluation[J]. Pressure Vessel,2006,8(23):7-11.
[15] 刘俊,霍立兴,张玉凤. SINTAP标准和BS 7910标准中FAD图评定方法横坐标求解方法的比较及分析[J].焊接学报,2006,1(27):97-100. LIU Jun,HUO Lixing,ZHANG Yufeng. Comparison and analysis of the method for solving the horizontal axis of FAD map evaluation method in SINTAP standard and BS 7910 standard[J]. Journal of Welding,2006,1(27):97-100.