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Probabilistic Control Volume Method for Evaluating the Effects of Notch Size and Loading Type on Fatigue Life

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Abstract

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.

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Acknowledgements

The authors would like to acknowledge the support from the Innovation Program (237099000000170004), the National Natural Science Foundation of China (91860112) and the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB22020200).

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Authors and Affiliations

  1. China North Vehicle Research Institute, Beijing, 100072, China

    Chunming Li, Zheng Hu & Wanhao Zhang

  2. State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China

    Chengqi Sun & Qingyuan Song

  3. School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China

    Chengqi Sun & Qingyuan Song

Authors
  1. Chunming Li
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  2. Zheng Hu
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  3. Chengqi Sun
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  4. Qingyuan Song
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  5. Wanhao Zhang
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Correspondence to Chengqi Sun.

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Li, C., Hu, Z., Sun, C. et al. Probabilistic Control Volume Method for Evaluating the Effects of Notch Size and Loading Type on Fatigue Life. Acta Mech. Solida Sin. 33, 141–149 (2020). https://doi.org/10.1007/s10338-019-00126-2

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  • DOI: https://doi.org/10.1007/s10338-019-00126-2

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