| 随机疲劳寿命的估算 |
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| 引用本文： | 童小燕,王德俊,徐灏.随机疲劳寿命的估算[J].东北大学学报(自然科学版),1988(4). |
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| 作者姓名： | 童小燕 王德俊 徐灏 |
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| 作者单位： | 东北工学院机械强度研究室
(童小燕，王德俊)，东北工学院机械强度研究室(徐灏) |
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| 摘 要： | 概述了随机疲劳寿命估算的一般过程,就该过程中的局部真实应力应变分析的简化计算方法和随机载荷下的循环应力应变模拟及疲劳损伤进行了探讨。依据实验结果,提出了一个能量损伤模型,通过寿命估算,对提出的模型进行了验证,并将其估算结果与现有的几种典型疲劳损伤模型估算结果进行了比较。同时,还讨论了疲劳性能参数的波动对寿命估算精度的影响。
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| 关 键 词： | 疲劳寿命 随机载荷 疲劳损伤 循环应力-应变模拟 循环滞回能 |
Predictions of Random Fatigue Life |
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| Tong Xiaoyan,Wang Dejun,Xu Hao.Predictions of Random Fatigue Life[J].Journal of Northeastern University(Natural Science),1988(4). |
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| Authors: | Tong Xiaoyan Wang Dejun Xu Hao |
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| Abstract: | With a general review given briefly to the prediction procedure of random fatigue life, the article discusses mainly two problems:the simplification of locally real stress-strain analysis, and the cyclic stress-strain simulation and fatigue damage under random loads. An energy-damage model is developed in accordance with experimental results and the model is examined through the fatigue life prediction, then such a prediction result is compared with others obtained from some typical fatigue damage models currently used. Moreover, the influence of the fluctuation of fatigue parameters on the accuracy of fatigue life predicted is discussed |
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| Keywords: | fatigue life random load fatigue damage cyclic stress-strain simulation cyclic hysteresis energy |
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