| ADB610钢焊接接头概率疲劳裂纹扩展分析 |
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| 引用本文： | 张天会,果霖,施杰,薛彬,徐人平. ADB610钢焊接接头概率疲劳裂纹扩展分析[J]. 焊接学报, 2015, 36(1): 79-82 |
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| 作者姓名： | 张天会 果霖 施杰 薛彬 徐人平 |
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| 作者单位： | 1.云南农业大学机电工程学院, 昆明 650201 |
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| 基金项目： | 云南省应用基础研究资助项目(2013FD021) |
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| 摘 要： | 采用焊条电弧焊方法对ADB610钢进行焊接,对焊接接头进行疲劳裂纹扩展试验,研究其概率疲劳裂纹扩展规律.采用两步七点递增多项式拟合方法,计算了一系列相同裂纹长度下母材区、热影响区和焊缝区的对数裂纹扩展速率方差和存活率分别为50%,90%,95%,99%,99.9%的裂纹扩展速率.结果表明,总体上母材区的裂纹扩展分散性最小,热影响区其次,焊缝区分散性最大;而且总体上存活率相同时,在裂纹扩展的初期,母材区的裂纹扩展速率最快,焊缝区的裂纹扩展速率最慢;在裂纹扩展末期,三区域的裂纹扩展快慢相当;随着存活率增大,三区域裂纹扩展快慢差别不大时所对应的裂纹长度减小.
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| 关 键 词： | ADB610钢 焊接接头 概率 疲劳裂纹扩展 |
| 收稿时间： | 2013-06-09 |
Fatigue crack propagation with probability for ADB610 steel welded joints |
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| ZHANG Tianhui,GUO Lin,SHI Jie,XUE Bin and XU Renping. Fatigue crack propagation with probability for ADB610 steel welded joints[J]. Transactions of The China Welding Institution, 2015, 36(1): 79-82 |
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| Authors: | ZHANG Tianhui GUO Lin SHI Jie XUE Bin XU Renping |
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| Affiliation: | 1.Faculty of Mechanical and Electrical Engineering, Yunnan Agriculture University, Kunming 650201, China2.Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650051, China |
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| Abstract: | The fatigue crack propagation rate with probability (P) for welded by joints of ADB610 steel were investigated through fatigue crack propagation experiments. The joints were welded using shielded metal arc welding method. Twice seven data fitting method was adopted to calculate fatigue crack propagation rate of each sample in a series of same crack length. And it was calculated for the standard deviation of logarithmic fatigue crack propagation rate, and fatigue crack propagation rate with P=50%, P=90%, P=95%, P=99%, P=99.9% of base material(BM), heat affected zone (HAZ) and welded material (WM). The results show that the dispersibility of fatigue crack propagation in BM is the least, and the one in WM is the maximum. And when the probability is in the same, the speed of crack propagation in BM is the quickest and the one in WM is the slowest during the early stage of fatigue crack propagation, but during the last stage of fatigue crack propagation the difference of crack propagation speed in BM, HAZ and WM is not significant. And with the probability increase, it is decreased for the crack length corresponding to the insignificant difference for the three zones. |
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| Keywords: | ADB610 steel welded joints probability fatigue crack propagation |
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