Acta Metall Sin  1988, Vol. 24 Issue (4): 342-347    DOI:

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A J-INTEGRAL ANALYSIS OF CRACKS IN OVERMATCHED WELDED JOINTS

MA Weidian;ZHANG Shicheng;TIAN Xitang Qinghua University; Harbin Institute of TechnologyDept. of Mechanical Engineering; Qinghua University; Beijing

MA Weidian;ZHANG Shicheng;TIAN Xitang Qinghua University; Harbin Institute of TechnologyDept. of Mechanical Engineering; Qinghua University; Beijing. A J-INTEGRAL ANALYSIS OF CRACKS IN OVERMATCHED WELDED JOINTS. Acta Metall Sin, 1988, 24(4): 342-347.

Abstract References Related Articles Recommended Metrics Download:  PDF(494KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The effects of material inhomogenity and weld width of the over-matched welded joints with a longitudinal crack or flaw upon the J-integral, a charac-terizing parameter for elastoplastic fracture, have been studied. The overmatchedweld is idealized to be a parallelly cracked and sandwiched hard layer, the yieldstress of which is higher than that of the base metal. Numerical solutions were ob-tained by using elastoplastic finite element method under the assumption of plane stress.The results show that the values of J-integral are remarkably affected by the mate-rial inhomogenity and the weld width especially when the nominal stress or nominalstrain is comparatively high, which, therefore, should be taken into account whenevaluating the crack driving force for a overmatched joint. Key words:  welded joint      crack      J-integral      Received:  18 April 1988      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1988/V24/I4/342 1 Kumar V, German M D, Shih C F, 高庆译. 铁道科技译文. 西南交通大学科技情报研究室, 1982; (2) :1 2 Satoh K, Toyada M. International Institute of Welding Document X-1031-83 3 Satoh K, Toyada M, International Institute of Welding Document X-1113-86 4 马维甸,焊接学报,1987;8(2) :89 5 Radaj D. Weld Res Abroad, 1976; 4: 51 6 Rice J R.Fracture, Vol. Ⅱ, London: Academic Press, 1968: 191 7 马维甸.机械工程学报,1987;23(4) :43 8 大路清嗣,小仓敬二,久保司郎著.向帝北,吴树森,韩有悌译.断裂力学(四),科学技术文献出版社重庆分社,1981:1 9 马维甸.机械强度,1987;9(4) :62 10 马维甸.焊接接头不均匀体的弹塑性断裂力学研究,博士学位论文,哈尔滨工业大学,1985 11 Tian Xitang(田锡唐), Ma Weidian(马维甸). 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