| 某型飞机机翼Ⅱ梁框疲劳寿命研究 |
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| 引用本文： | 李曙林,李寿安.某型飞机机翼Ⅱ梁框疲劳寿命研究[J].机械科学与技术(西安),2005,24(6):686-688. |
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| 作者姓名： | 李曙林 李寿安 |
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| 作者单位： | 西北工业大学,航空学院,西安,710072;空军工程大学,工程学院,西安,710038;西北工业大学,航空学院,西安,710072 |
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| 摘 要： | 某型飞机机翼Ⅱ梁框是重要的受力部件,必须准确估计疲劳寿命,以预防疲劳事故的发生。采用名义应力法和局部应变法两种方法及Miner累积损伤理论估计疲劳裂纹形成寿命;在随机载荷谱转化为等幅载荷谱的基础上通过Walker方程求得疲劳裂纹扩展寿命,从而估算出某型飞机机翼Ⅱ梁框的疲劳寿命。估算结果与试验结果吻合很好。
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| 关 键 词： | 局部应变 累积损伤 裂纹形成 疲劳寿命 |
| 文章编号： | 1003-8728(2005)06-0686-03 |
Research of Fatigue Life of the Second Crossbeam in a Certain Aircraft Aerofoil |
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| LI Shu-lin ,LI Shou-an.Research of Fatigue Life of the Second Crossbeam in a Certain Aircraft Aerofoil[J].Mechanical Science and Technology,2005,24(6):686-688. |
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| Authors: | LI Shu-lin LI Shou-an |
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| Affiliation: | LI Shu-lin 1,2,LI Shou-an1 |
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| Abstract: | The second crossbeam in a certain aircraft aerofoil is a pivotal bearing beam,its fatigue life has to be estimated to avoid fatigue accidents. The fatigue crack formation life of it is calculated by two methods of local stress-strain method and nominal stress method; and the fatigue crack growth life is estimated by Walker equation on the basis of load spectra of constant amplitude transformed from that of mutative amplitudes; the fatigue life is estimated as the sum of the fatigue crack formation life and the fatigue crack growth life. The estimation of the fatigue life agrees well with experiment. |
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| Keywords: | Local strain Cumulative fatigue damage Crack formation Fatigue life |
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