| ε-N曲线三参数幂函数公式 |
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| 引用本文： | 傅惠民.ε-N曲线三参数幂函数公式[J].航空学报,1993,14(3):173-176. |
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| 作者姓名： | 傅惠民 |
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| 作者单位： | 北京航空航天大学固体力学所 北京 |
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| 摘 要： | 给出了一种描述ε-N曲线的三参数幂函数公式。由于该公式考虑了疲劳极限,所以与著名的Manson-Coffin公式相比,它不但能更好地拟合各种材料的应变-寿命试验数据,简化了ε-N曲线的测试工作,而且可以更加方便和精确地计算结构的损伤和寿命。
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| 关 键 词： | 疲劳 寿命估算 ε-N曲线 |
A FORMULA OF THREE-PARAMETER POWER FUNCTION FOR ε-N CURVES |
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| Fu Hui-min.A FORMULA OF THREE-PARAMETER POWER FUNCTION FOR ε-N CURVES[J].Acta Aeronautica et Astronautica Sinica,1993,14(3):173-176. |
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| Authors: | Fu Hui-min |
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| Institution: | Institute of Solid Mechanics, Beij ing University of Aeronautics and Astronautics, Beij ing, 100083 |
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| Abstract: | A formula of three-parameter power function for strain-life fatigue curves is presented in this paper. Fatigue limits of materials are considered in the formula. Thus it can fit strain-life fatigue data better and calculate lives of structures more accurately than the Manson-Coffin formula. Besides, the tests of determining e-N curves of materials are simplified by it. Many fatigue results of materials have satisfactorily been treated by this formula. It is simple and convenient for structural life-prediction. |
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| Keywords: | fatigue life prediction s-N curve |
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