| 孟广伟,李锋,周振平.疲劳裂纹扩展寿命的可靠性及灵敏度分析[J].计算力学学报,2007,24(6):876~879 |
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| 疲劳裂纹扩展寿命的可靠性及灵敏度分析 |
| Reliability and sensitivity analysis on growth life of fatigue crack |
| 投稿时间：2005-09-01 修订日期：2005-11-29 |
| DOI：10.7511/jslx20076169 |
| 中文关键词: 疲劳,断裂,可靠性,随机有限元,应力强度因子,灵敏度分析 |
| 英文关键词:fatigue,fracture,reliability,stochastic finite element method,stress intensity factors,sensitivity analysis |
| 基金项目:吉林大学“985工程”汽车工程科技创新平台资助，吉林省科技厅(20060538)基金项目 |
| 孟广伟 李锋 周振平 |
| 吉林大学机械科学与工程学院 吉林长春130022 |
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| 中文摘要: |
| 将影响结构疲劳裂纹扩展寿命的不确定因素视为随机变量,用随机有限元和可靠性分析理论,从概率论和数理统计的角度出发对含裂纹平面结构的断裂过程进行了可靠性分析。通过疲劳裂纹扩展寿命可靠度对随机变量的灵敏度分析,可以看出不同因素对疲劳裂纹扩展寿命可靠度影响的差别很大。 |
| 英文摘要: |
| 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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