Abstract A statistical method for the estimation of plastic strain energy per cycle in metals experiencing fatigue is presented. It is shown that the plastic strain distribution under cyclic loading follows a two-parameter Weibull probability function, where monotonic stress-strain data is used as input. The second probability function is incorporated to account for different crystallographic directions. To verify the results, a thermodynamically-based model is used to measure the PSE per cycle and A finite element model was developed to predict plastic strain energy per cycle. The results via the presented method corroborate the predictions of the numerical and thermodynamically-based models.

中文翻译：

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在考虑微塑性的情况下确定循环塑性应变能

摘要 提出了一种估算疲劳金属每循环塑性应变能的统计方法。结果表明，循环载荷下的塑性应变分布遵循双参数威布尔概率函数，其中使用单调应力应变数据作为输入。合并第二个概率函数以说明不同的结晶方向。为了验证结果，使用基于热力学的模型来测量每个循环的 PSE，并开发了一个有限元模型来预测每个循环的塑性应变能。通过所提出方法的结果证实了基于数值和热力学模型的预测。