| 局部应力应变法弯扭复合疲劳损伤准则 |
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| 引用本文： | 聂宏,乔新,樊蔚勋.局部应力应变法弯扭复合疲劳损伤准则[J].航空学报,1991,12(1):80-82. |
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| 作者姓名： | 聂宏 乔新 樊蔚勋 |
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| 作者单位： | 南京航空学院
(聂宏，乔新)，南京航空学院(樊蔚勋) |
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| 摘 要： | <正> 关于弯扭复合疲劳强度问题的研究,以往都是建立在名义应力法的基础上而局部应力应变法是一种比名义应力法更好的疲劳寿命计算方法,尤其是对于解决中、低周疲劳寿命问题。因此,本文把局部应力应变法引入弯扭复合疲劳寿命计算中,建立一个基于局部应力应变法的弯扭复合疲劳损伤准则。
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| 关 键 词： | 疲劳寿命 弯扭 损伤准则 |
A CRITERION OF FATIGUE DAMAGE FOR COMBINED BENDING AND TORSION BASED ON LOCAL STRESS-STRAIN METHOD |
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| Nanjing Aeronautical Institute Nie Hong,Qiao Xin and Fan Weixun.A CRITERION OF FATIGUE DAMAGE FOR COMBINED BENDING AND TORSION BASED ON LOCAL STRESS-STRAIN METHOD[J].Acta Aeronautica et Astronautica Sinica,1991,12(1):80-82. |
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| Authors: | Nanjing Aeronautical Institute Nie Hong Qiao Xin and Fan Weixun |
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| Institution: | Nanjing Aeronautical Institute |
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| Abstract: | A criterion of fatigue damage for combined bending and torsion based on local stress-strain method is presented and a formula for local equivalent stress eq (i. e. stress strength) at notch root of notched structures is derived. It is pointed out that the structures will contain the same fatigue damage if only their local equivalent stresses are equal. Therefore, the fatigue life of a notched structure under combined bending and torsion can be predicted based on only a simple bending stress-life curve obtained from smooth specimens. |
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| Keywords: | fatigue life bending and torsion damage criterion |
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