This paper assesses the ability of the Adjustable Localisation Operator (ALO) method to predict the influence of residual stresses on the fatigue behaviour of notched components. Different initial residual stress states are introduced into notched specimens, which are then tested under cyclic loadings in a fatigue range of 10³ to 10⁵ cycles. Experimental comparisons with initially stress-free specimens have shown how tensile residual stresses reduce fatigue life under repeated compressive loading while compressive residual stresses increase fatigue life under repeated tensile loading.

Finite Element Analysis (FEA) and ALO method predictions of changes in residual stress are compared to experimental measurements beforehand to assess fatigue life predictions. A modified version of Morrow’s criterion is used to account for the mean stress effect. Results have shown that the ALO method can predict the influence of residual stresses on low-cycle fatigue with the same accuracy as finite element analysis and with a significant reduction in computation time.

本文评估了可调整定位算子（ALO）方法预测残余应力对缺口构件疲劳行为的影响的能力。将不同的初始残余应力状态引入带缺口的试样中，然后在10 ³至10 ⁵个循环的疲劳范围内的循环载荷下进行测试。与最初无应力样品的实验比较表明，拉伸残余应力如何降低重复压缩载荷下的疲劳寿命，而压缩残余应力如何增加重复拉伸载荷下的疲劳寿命。

预先将残余应力变化的有限元分析（FEA）和ALO方法预测与实验测量进行比较，以评估疲劳寿命预测。Morrow准则的修改版本用于说明平均应力效应。结果表明，ALO方法可以预测残余应力对低周疲劳的影响，其准确性与有限元分析相同，并且可以显着减少计算时间。