| 升降法试验C-R-S曲线及疲劳极限研究 |
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| 引用本文： | 边新孝,李威,邱丽芳,谈嘉祯.升降法试验C-R-S曲线及疲劳极限研究[J].北京科技大学学报,2010,32(3). |
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| 作者姓名： | 边新孝 李威 邱丽芳 谈嘉祯 |
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| 作者单位： | 北京科技大学机械工程学院,北京,100083 |
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| 基金项目： | 国家自然科学基金资助项目(No.50375018) |
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| 摘 要： | 为获得安全可靠的疲劳极限,提出了处理升降法试验数据置信限-可靠度-应力(C-R-S)曲线方法.把升降法的应力水平和可靠度作为随机变量,进行了最优分布检验和参数估计,确定置信限,按三参数Weibull分布、采用最小二乘法拟合C-R-S曲线,获得具有一定置信限和可靠度的疲劳极限.通过38SiMnMo调质齿轮弯曲疲劳强度升降法试验,获得置信限为95%、可靠度为99%的弯曲疲劳极限应力为283.76MPa,位于GB3480极限应力框图内,表明该方法是可行的.
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| 关 键 词： | 齿轮 疲劳极限 升降法 可靠度 置信限 |
Study on C-R-S curves of up-and-down test and fatigue limit stress |
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| BIAN Xin-xiao,LI Wei,QIU Li-fang,TAN Jia-zheng.Study on C-R-S curves of up-and-down test and fatigue limit stress[J].Journal of University of Science and Technology Beijing,2010,32(3). |
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| Authors: | BIAN Xin-xiao LI Wei QIU Li-fang TAN Jia-zheng |
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| Abstract: | A technique for dealing with confidence limit-reliability-stress (C-R-S) curves of up-and-down test was presented to obtain a more accurate endurance limit.Firstly,a distribution hypothesis was tested and its parameters were estimated with regard to the random variables of stress level and reliability.According to 3-parameter Weibull distribution,C-R-S curves were fitted by the least square method.Lastly,the endurance limit was obtained concerning reliability.The endurance limit with a confidence limit of 9... |
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| Keywords: | gear endurance limit up-down method reliability confidence limit |
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