在对带有一个铆接孔的试件进行试验研究的基础上,利用性能退化失效曲线,提出了一种新的初始疲劳质量和裂纹扩展速率的确定方法.根据试验结果和理论推导,建立了裂纹扩展长度与加载循环次数的函数关系.在此基础上,估算了EIFS值,并用指数函数拟合方法估计了疲劳裂纹扩展速率.最后通过对临界裂纹尺寸的理论计算验证了新方法的可行性和有效性.
参考文献
| [1] | JAMES W P.Probabilistic fracture mechanics and reliability (1 st Ed)[M].Dordrecht:Martinus Nijhoff Publishers,1987:22-43. |
| [2] | Yongming Liu;Sankaran Mahadevan .Probabilistic fatigue life prediction using an equivalent initial flaw size distribution[J].International Journal of Fatigue,2009(3):476-487. |
| [3] | YANG J N;MANNING S D.Distribution of equivalent initial flaw size[A].San Francisco,CA,USA,1980 |
| [4] | P. White;L. Molent;S. Barter .Interpreting fatigue test results using a probabilistic fracture approach[J].International Journal of Fatigue,2005(7):752-767. |
| [5] | L. Molent;Q. Sun;A. J. Green .Characterisation of equivalent initial flaw sizes in 7050 aluminium alloy[J].Fatigue & Fracture of Engineering Materials and Structures,2006(11):916-937. |
| [6] | Moreira PMGP;de Matos PFP;de Castro PMST .Fatigue striation spacing size in Al 2024-T3 and equivalent initial flaw riveted specimens[J].Theoretical and Applied Fracture Mechanics,2005(1):89-99. |
| [7] | FAWAS S A .Equivalent initial flaw size testing and analysis of transport aircraft skin splices[J].Fatigue & Fracture of Engineering Materials & Structures,2000,26(03):279-290. |
| [8] | 周玉辉,康锐.基于退化失效模型的旋转机械寿命预测方法[J].核科学与工程,2009(02):146-151. |
| [9] | 张永强,刘琦,周经伦.基于性能退化数据的可靠性评定方法研究[J].飞行器测控学报,2005(05):54-58. |
| [10] | 邓爱民,陈循,张春华,汪亚顺.基于性能退化数据的可靠性评估[J].宇航学报,2006(03):546-552. |
| [11] | 赵建印,刘芳.加速退化失效产品可靠性评估方法[J].哈尔滨工业大学学报,2008(10):1669-1671. |
| [12] | RAMIREZ J G;GORE W L;JOHNSTON G .New Methods for Modeling Reliability Using Degradation Data[EB/OL].http://support.sas.com/rnd/app/papers/abstracts/sugi26_ramirez2.html |
| [13] | SALAWU O S .Detection of structural damage through changes in frequency:a review[J].Engineering Structures,1997,19(09):718-723. |
| [14] | S. Ganesh Sundara Raman;v.M. Radhakrishnan .On cyclic stress-strain behaviour and low cycle fatigue life[J].Materials & Design,2002(3):249-254. |
| [15] | 赵少汴;王忠保.抗疲劳设计-方法与数据[M].北京:机械工业出版社,1997:470. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%