| 疲劳缺口系数Kf与理论应力集中系数Kt之间的关系 |
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| 引用本文： | 胡本润,刘建中,陈剑峰. 疲劳缺口系数Kf与理论应力集中系数Kt之间的关系[J]. 材料工程, 2007, 0(7): 70-73 |
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| 作者姓名： | 胡本润 刘建中 陈剑峰 |
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| 作者单位： | 北京航空材料研究院,北京,100095;北京航空材料研究院,北京,100095;北京航空材料研究院,北京,100095 |
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| 摘 要： | 疲劳缺口系数Kf是表征缺口部位疲劳强度降低程度的参量,这一系数在结构抗疲劳设计中经常被使用.一般认为Kf与理论应力集中系数Kt呈线性关系,线性的斜率与不同材料类别(铝合金、钛合金和钢)有关.通过对大量不同材料、不同应力比和不同缺口试样形式的高周疲劳极限的系统分析,发现大多数情况下K f与Kt的呈线性关系,但有些情况下二者不服从线性关系.Kf与Kt的关系除与材料类别有关外还与实验的应力比有关.
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| 关 键 词： | 缺口试样 疲劳 疲劳缺口系数Kf 理论应力集中系数Kt |
| 文章编号： | 1001-4381（2007）07-0070-04 |
| 修稿时间： | 2006-04-112006-08-12 |
Relationship Between Fatigue Notch Factor Kf and Stress Concentration Factor Kt |
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| HU Ben-run,LIU Jian-zhong,CHEN Jian-feng. Relationship Between Fatigue Notch Factor Kf and Stress Concentration Factor Kt[J]. Journal of Materials Engineering, 2007, 0(7): 70-73 |
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| Authors: | HU Ben-run LIU Jian-zhong CHEN Jian-feng |
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| Affiliation: | Beijing Institute of Aeronautical Materials, Beijing 100095, China |
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| Abstract: | Fatigue notch factor Kf is usually used to express the reduction in fatigue strength of the component notch. The factor of Kf is very useful in fatigue design. In this paper analysis for many fatigue limit of aluminum alloy, titanium alloy and steel with stress ratio of 0.5, 0.06, - 1 showed that the relation between most of Kt and Kf is linear except some case. The relation of Kf and Kt not only depends on the kinds of material but also on the stress ratios. |
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| Keywords: | notched specimen fatigue fatigue notch factor Kf stress concentration factor Kt |
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