| 考虑概率与置信度的疲劳裂纹扩展率模型及其参数测定方法 |
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| 引用本文： | 杨冰,赵永翔,何朝明,王明新. 考虑概率与置信度的疲劳裂纹扩展率模型及其参数测定方法[J]. 机械工程学报, 2004, 40(6): 183-187 |
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| 作者姓名： | 杨冰 赵永翔 何朝明 王明新 |
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| 作者单位： | 西南交通大学牵引动力国家重点实验室,成都,610031;西南交通大学牵引动力国家重点实验室,成都,610031;西南交通大学牵引动力国家重点实验室,成都,610031;西南交通大学牵引动力国家重点实验室,成都,610031 |
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| 基金项目： | 牵引动力国家重点实验室开放基金(0103)，西南交通大学校基金 |
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| 摘 要： | 提出了一种描述随机疲劳裂纹扩展的概率模型,考虑了数据随机特性(即存活概率问题)和样本数量(即置信度问题)两方面对概率评价的影响。模型建立在从优化拟合效果和进一步利用试验信息角度改进后的Paris公式基础上。考虑整套试验数据的随机特性,利用极大似然法原理和数学规划法求解模型参数。对16MnR钢试验数据的分析验证了模型和方法的有效性。
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| 关 键 词： | 疲劳 裂纹扩展 概率分析 置信度 |
| 修稿时间： | 2003-05-13 |
PROBABILITY-CONFIDENCE FATIGUE CRACK GROWTH RATE MODEL AND ESTIMATION METHOD |
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| Yang Bing,Zhao Yongxiang,He Chaoming,Wang Mingxin National Key Traction Power Laboratory,Southwest Jiaotong University,Chengdu. PROBABILITY-CONFIDENCE FATIGUE CRACK GROWTH RATE MODEL AND ESTIMATION METHOD[J]. Chinese Journal of Mechanical Engineering, 2004, 40(6): 183-187 |
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| Authors: | Yang Bing Zhao Yongxiang He Chaoming Wang Mingxin National Key Traction Power Laboratory Southwest Jiaotong University Chengdu |
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| Affiliation: | Yang Bing,Zhao Yongxiang,He Chaoming,Wang Mingxin National Key Traction Power Laboratory,Southwest Jiaotong University,Chengdu 610031 |
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| Abstract: | A probabilistic model is suggested for characteringthe random fatigue crack growth.It is considered of the prob-abilistic effects of scattering regularity and amount of the testdata. The model is established on an improved Paris equation,which is developed from a consideration of better-fit effects andmore application of the test information. The parameters of modelare measured by taking into account the stochastic characteristicof entire test data, which is connected with a maximum likeli-hood method and math programming.Availability and feasibilityare indicated by an analysis of the 16MnR steel test data. |
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| Keywords: | Fatigue Crack growth Probabilistic analysis confidence |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
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