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| Reliability and sensitivity analysis on growth life of fatigue crack |
| Received:September 01, 2005 Revised:November 29, 2005 |
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| DOI：10.7511/jslx20076169 |
| KeyWord:fatigue,fracture,reliability,stochastic finite element method,stress intensity factors,sensitivity analysis |
| MENG Guang-wei LI Feng ZHOU Zhen-ping |
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| Abstract: |
| For the effect of some uncertainties such as material,geometry,loading,etc,the growth life fatigue crack appears to be scattered.All these uncertainties were expressed by basic random variables.From the aspects of probability theory and mathematical statistics,an estimation method of the reliability analysis on growth life of fatigue crack was proposed based on stochastic finite element method and reliability analysis.Sensitivity factors were obtained and the effects of parameters on reliability growth life of fatigue crack were studied.The results show that different parameters have much different influences on the reliability. |
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