| 焊接金属疲劳裂纹萌生寿命估算方法的研究 |
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| 引用本文： | 杨化仁.焊接金属疲劳裂纹萌生寿命估算方法的研究[J].力学与实践,2004,26(3):20-22. |
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| 作者姓名： | 杨化仁 |
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| 作者单位： | 沈阳大学,沈阳,110044 |
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| 摘 要： | 疲劳裂纹萌生阶段在整个疲劳破坏过程中占有极为重要的地位，而萌生阶段的裂纹体损伤规律用长裂纹断裂力学方法是无法确定的．以萌生阶段中塑性滞回能作为控制参量，根据实验数据拟合出疲劳损伤的连续曲线，得到裂纹萌生寿命估算公式．
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| 关 键 词： | 疲劳裂纹 塑性滞回能 金属焊接 焊缝分析 |
| 修稿时间： | 2003年5月3日 |
THE ESTIMATE METHOD OF FATIGUE CRACK INITIATION LIFE IN WELDED METAL |
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| YANG Huaren Shenyang University,Shenyang ,China.THE ESTIMATE METHOD OF FATIGUE CRACK INITIATION LIFE IN WELDED METAL[J].Mechanics and Engineering,2004,26(3):20-22. |
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| Authors: | YANG Huaren Shenyang University Shenyang China |
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| Institution: | YANG Huaren Shenyang University,Shenyang 110044,China |
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| Abstract: | Fatigue crack initiation is an important period
in the whole fatigue life. The crack initiation period can-
not be estimated with fracture mechanics, which is used
for large cracks. In this paper, the crack initiation life es-
timate equation is deduced by using the fatigue damage
continuous curve with the basis of experimental data ob-
tained from the crack initiation plastic hysteresis energy
as a control parameter. |
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| Keywords: | fatigue crack initiation plastic hysteresis energy |
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