| 双向载荷条件下Ⅰ型裂纹的疲劳扩展 |
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| 引用本文： | 杨益民,王明娥.双向载荷条件下Ⅰ型裂纹的疲劳扩展[J].陶瓷科学与艺术,1994(2). |
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| 作者姓名： | 杨益民 王明娥 |
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| 作者单位： | 南京化工学院化工机械系 |
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| 摘 要： | 研究了双轴向应力状态下Ⅰ型穿透裂纹的疲劳扩展规律，采用构形合理且经精确标定应力强度因子值的双向十字形试样，在电液伺服双轴向疲劳试验机上对低合金钢（１６ＭｎＲ）进行了多种载荷比的疲劳裂纹扩展速率试验，得到了双轴向应力状态下的Ｐａｒｉｓ方程，为目前按缺陷评定规范依据单轴向疲劳试验所得数据对工程构件进行疲劳评定提供参考数据，并就当前研究者们对于双向应力场中横向载荷对疲劳裂纹扩展行为的影响的不同看法进行分析探讨。
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| 关 键 词： | 双轴向应力状态，疲劳裂纹扩展，Paris方程，Ⅰ型穿透裂纹 |
GROWTH OF MODE I FATIGUE CRACKS UNDER BIAXIAL LOADS |
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| Yang Yimin, Wang Ming'e.GROWTH OF MODE I FATIGUE CRACKS UNDER BIAXIAL LOADS[J].Ceramics Science & Art,1994(2). |
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| Authors: | Yang Yimin Wang Ming'e |
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| Abstract: | An investigation of propagation behavior for Mode I fatigue crack under biaxial loads werecarried out. A reasonble configuration of a cruel form specimen whose K1 values was precisely calibrated is determined. Fatigue tests of low-alloy steel 16 MnR under biaxial loads have been performed ona closed-loop servohydraulic biaxial fatigue testing system. The Paris equation under biaxial loadingwas derived in order to obtain the reference data for fatigue assessment of engineering components byusing the current codes of defect assessment. The effect of load paralleling to the crack plane on the fatigue crack growth rate was also discussed. |
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| Keywords: | Biaxial stress condition fatigue crack growth Paris equation mode I penetratingcrack |
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