| 非均质焊接接头裂纹尖端场的HRR主导性与J积分断裂判据 |
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| 引用本文： | 康继东,耿雪霏. 非均质焊接接头裂纹尖端场的HRR主导性与J积分断裂判据[J]. 焊接学报, 1998, 19(3): 40-44 |
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| 作者姓名： | 康继东 耿雪霏 |
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| 作者单位： | [1]南京航空航天大学 [2]黑龙江交通高等专科学校 |
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| 摘 要： | 采用反射式贴片云纹干涉法对焊接接头裂纹尖端位移场了测量，并考察了非均质焊接接头中的ＨＲＲ主导有效性与Ｊ积分断裂判据的应用可行性，结果表明，至少对于本文所研究的情形而言，无论是Ａ５３７钢采用ＬＢ５２ＮＳ焊条施焊的高匹配接头，还是９％Ｎｉ钢，采用ＯＫ６９．４５焊条施焊的低匹配接头，横向位移场中ＨＲＲ主导失效，而纵向位移场中ｌｇｖ－ｌｇｒ的线性关系不同于焊缝或母绪的１／（ｎ＋１）。因此，在非均质焊接接头
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| 关 键 词： | J积分 非均质性 HRR主导 焊接接头 焊接 |
| 收稿时间： | 1997-09-25 |
| 修稿时间： | 1998-04-27 |
HRR Dominance and J-integral as Fracture Parameter in Heterogeneous Welded Joint |
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| Kang Jidong and Geng Xuefei. HRR Dominance and J-integral as Fracture Parameter in Heterogeneous Welded Joint[J]. Transactions of The China Welding Institution, 1998, 19(3): 40-44 |
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| Authors: | Kang Jidong and Geng Xuefei |
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| Affiliation: | Kang Jidong (Nanjing University of Aeronautics & Astronautics) Geng Xuefei (Heilongjiang Communication College of Higher Learning) |
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| Abstract: | HRR-dominace and the application feasibility of J -integral in heterogeneous welded joints is investigated by Moire interferometry of reflected sticking film. The results showed that at least for cases studied in this paper,for either the welded joint of steel A537 welded by electrode LB52NS with an overmatching weld in strength or the welded joint of steel 9%Ni welded by electrode OK69.45 with an undermatching weld in strength, HRR-dominance is failure in horizontal displacement field while the slope of lgv-lgr in vertical displacement field is not agreement with 1/( n +1) of base metal or weld metal. So, it is doubtful to directly use the J -integral as a fracture criterion in heterogeneous welded joints.By the way, it is also not correct to use sigularity elements in vinicity of the crack tip in welded joint. |
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| Keywords: | J -integral heterogeneity mismatching HRR-dominance welded joint |
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