| 金属焊接接头疲劳裂纹萌生寿命估算方法的研究 |
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| 引用本文： | 张朝志. 金属焊接接头疲劳裂纹萌生寿命估算方法的研究[J]. 机械设计与制造, 2005, 45(3): 16-17 |
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| 作者姓名： | 张朝志 |
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| 作者单位： | 辽宁交通高等专科学校,沈阳,110122 |
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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。这里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 萌生 塑性滞回能 |
| 文章编号： | 1001-3997(2005)03-0016-02 |
| 修稿时间： | 2004-07-08 |
Study on estimate method of fatigue crack initiation life in welded metal |
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| ZHANG Chao-zhi. Study on estimate method of fatigue crack initiation life in welded metal[J]. Machinery Design & Manufacture, 2005, 45(3): 16-17 |
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| Authors: | ZHANG Chao-zhi |
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| Abstract: | Fatigue crack initiation is an important period in the whole fatigue life.The damage regularity of crack initial period cannot estimate with fracture mechanics which is used in large crack.In this paper, the crack initiation life estimate equation has been deduced by using the fatigue damage continuous curve with the basis of experimental data that are obtained from the crack initiation plastic hysteresis energy as control parameter. |
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| Keywords: | Fatigne corck Initiation Plastic hysteresis energy |
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