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| 2024铝合金预拉伸板喷丸强化前后疲劳寿命的分布及可靠度模型研究 | |
| 引用本文： | 张志远,支希哲,闫五柱,刘军,杨仕超. 2024铝合金预拉伸板喷丸强化前后疲劳寿命的分布及可靠度模型研究[J]. 航空材料学报, 2012, 32(4): 92-96 |
| 作者姓名： | 张志远 支希哲 闫五柱 刘军 杨仕超 |
| 作者单位： | 西北工业大学力学与土木建筑学院先进材料测试中心,西安,710129 |
| 基金项目： | 国家自然科学基金资助项目，高等学校学科创新引智计划项目 |
| 摘 要： | 为了研究喷丸强化对2024铝合金预拉伸板疲劳特性的影响以及喷丸强化前后疲劳寿命的数学分布及可靠度模型,对铸钢丸喷丸强化前后的2024铝合金预拉伸板进行疲劳对比试验。结果表明:喷丸强化能明显提高2024铝合金预拉伸板的疲劳寿命。对喷丸强化前后的疲劳寿命分布进行拟合优度检验发现:喷丸强化前疲劳寿命服从威布尔分布,而喷丸强化后的疲劳寿命服从对数正态分布。建立了2024铝合金预拉伸板喷丸强化前后疲劳寿命的分布模型和可靠度模型。 |
| 关 键 词： | 喷丸 疲劳寿命 预拉伸 数学分布 可靠度 |
Effect of Shot Peening on Fatigue Life and Reliability Model of Prestretching Aluminum Alloy 2024 |
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| ZHANG Zhi-yuan , ZHI Xi-zhe , YAN Wu-zhu , LIU Jun , YANG Shi-chao. Effect of Shot Peening on Fatigue Life and Reliability Model of Prestretching Aluminum Alloy 2024[J]. Journal of Aeronautical Materials, 2012, 32(4): 92-96 | |
| Authors: | ZHANG Zhi-yuan ZHI Xi-zhe YAN Wu-zhu LIU Jun YANG Shi-chao |
| Affiliation: | (Advanced Materials Test Center,Department of Engineering Mechanics,Northwestern Polytechnical University,Xi′an 710129,China) |
| Abstract: | A series of fatigue tests were carried out on prestretching aluminum alloy 2024 plate aimed to explore the effect of shot peening on fatigue lives and reliability models.The experiment results show that fatigue lives of prestretching aluminum alloy 2024 plates are remarkably increased after shot peening.Experiment data were analyzed by goodness of fit test approach.The fitting results show that the fatigue lives of prestretching specimens obey Weibull distribution while the fatigue lives of shot peening specimens obey the lognormal distribution.Then,the statistical distribution and reliability model of fatigue lives before and after shot peening of prestretching aluminum alloy 2024 plates were established. |
| Keywords: | shot peening fatigue life prestretching statistic distribution reliability |
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