| 一种适用于应力疲劳和应变疲劳的通用寿命模型 |
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| 引用本文： | 赵福星,史海秋,耿中行.一种适用于应力疲劳和应变疲劳的通用寿命模型[J].航空动力学报,2003,18(1):140-145. |
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| 作者姓名： | 赵福星 史海秋 耿中行 |
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| 作者单位： | 空军第一研究所,北京,100076 |
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| 摘 要： | 本文通过应变分布对寿命的影响函数分析,导出了一种适用于应力疲劳和应变疲劳的通用寿命模型。通过应变分布影响系数把应变疲劳与应力疲劳联系起来。该方法不仅可用于构件从应力疲劳到应变疲劳的各类疲劳寿命预测,还可用于构件的疲劳试验模拟件设计。文中列举了各种典型材料的典型应力集中试件的算例。
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| 关 键 词： | 航空、航天推进系统 疲劳寿命 预测模型 应变分布 |
| 文章编号： | 1000-8055(2003)01-0140-06 |
| 收稿时间： | 2001/12/19 0:00:00 |
| 修稿时间： | 2001年12月19 |
General Life Model Adapted to Both Stress Fatigue and Strain Fatigue |
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| Institution: | Airforce First Research Institute,Beijing100076,China;Airforce First Research Institute,Beijing100076,China;Airforce First Research Institute,Beijing100076,China |
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| Abstract: | A general life model adapted to both stress fatigue and strain fatigue is deduced,through analyzing the influence function of strain distribution on life.Strain fatigue and stress fatigue are related by the influence coefficient of strain distribution.This method can be applied to designing sample components for fatigue test as well as to forecasting various fatigue life of component from stress fatigue to strain fatigue.Examples of calculating various typical materials with typical stress concentration are listed in this paper. |
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| Keywords: | aerospace propulsion fatigue life forecast model strain distribution |
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