| 十字横向承载焊接接头疲劳裂纹扩展寿命估算 |
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| 引用本文： | 韩连元,朱安国.十字横向承载焊接接头疲劳裂纹扩展寿命估算[J].机械强度,1995,17(4):43-48. |
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| 作者姓名： | 韩连元 朱安国 |
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| 作者单位： | 郑州工学院数学力学系，郑州核工业部第五研究设计院 |
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| 摘 要： | 利用一种新的计算模型，用有限元法计算了十字焊接接头疲劳裂纹尖端的应力强度因子值，并拟合了裂纹在焊根和焊趾处扩展的应力强度因子表达式。据此利用Ｆｏｒｍａｎ疲劳模型，考虑显微金相组织的影响，估算了裂纹扩展寿命，与实验值比较，结果合理。
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| 关 键 词： | 焊接接头 应力强度因子 疲劳裂纹 寿命估算 |
THE ESTIMATION OF THE FATIGUE CRACK PRPAGATION LIFE FOR THE CRUCIFORM WELDED JOINTS UNDER TRANSVERSE LOANING |
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| Han Lianyuan, Zhu Anguo.THE ESTIMATION OF THE FATIGUE CRACK PRPAGATION LIFE FOR THE CRUCIFORM WELDED JOINTS UNDER TRANSVERSE LOANING[J].Journal of Mechanical Strength,1995,17(4):43-48. |
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| Authors: | Han Lianyuan Zhu Anguo |
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| Abstract: | In this paper,using a new computation model,the SIF values of the fatigue crack tip of weldedjoints are calculated by the finite element method.The formulas of SIF at the welded root and welded toe areregressed. The propagation lives of cracks are estimated that the effects of the metallographic structure were con-sidered. The results are reasonable as compared with the experiment values. |
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| Keywords: | welded joint stress intensity factor metallographic structure fatigue crack fatigue rnodel life es- timation |
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