The probabilistic control volume method has great prospects in correlating the effects of specimen size, notch and loading type on fatigue life or fatigue strength. In this work, the effects of notch size and loading type on fatigue life are investigated by using the probabilistic control volume method. Rotating bending and axial loading fatigue tests are at first performed on the hourglass specimen, circumferential V-notch specimen and V-notch plate specimen of 30CrMnSiA steel. Experimental results indicate that the notch reduces the fatigue strength of specimens in terms of nominal stress amplitude while in terms of local stress amplitude, the notch specimen could endure higher fatigue strength. Then, the probabilistic control volume method is used to evaluate the effects of notch size and loading type on fatigue life. It is shown that the probabilistic control volume method correlates well the effects of notch size and loading type on fatigue life, even for the local stress of the notch root exceeding the yield stress of the material.

中文翻译：

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缺口大小和载荷类型对疲劳寿命影响的概率控制量方法

概率控制体积法在将试样尺寸，缺口和载荷类型对疲劳寿命或疲劳强度的影响进行关联方面具有广阔的前景。在这项工作中，通过使用概率控制体积方法研究了缺口尺寸和载荷类型对疲劳寿命的影响。首先对30CrMnSiA钢的沙漏试样，周向V形缺口试样和V形缺口板试样进行旋转弯曲和轴向载荷疲劳试验。实验结果表明，该缺口降低了标称应力幅值，降低了疲劳强度，而就局部应力幅值而言，缺口可以承受更高的疲劳强度。然后，使用概率控制体积方法评估缺口尺寸和载荷类型对疲劳寿命的影响。