4.7 Article

Probabilistic notch fatigue assessment under size effect using weakest link theory

期刊

ENGINEERING FRACTURE MECHANICS
卷 276, 期 -, 页码 -

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2022.108935

关键词

Notch effect; Size effect; Fatigue; Probabilistic modeling; Weakest link theory

资金

  1. National Natural Science Foundation of China
  2. Sichuan Science and Technology Program
  3. Guangdong Basic and Applied Basic Research Foundation
  4. [12232004]
  5. [11972110]
  6. [2022JDJQ0024]
  7. [2021YFG0210]
  8. [2021B1515140030]

向作者/读者索取更多资源

This study proposes a probabilistic framework for fatigue life prediction of notched components, considering the effects of notch and size. Through FE analysis and validation using experimental data, the results indicate that the proposed method achieves better prediction accuracy.
Notch and size effects exerts significant influence on the fatigue performances of engineering components. In the present study, a probabilistic framework for fatigue life prediction of the notched components is proposed based on the calibrated weakest link theory considering size effect. Specifically, a probabilistic method considering the notch effect is elaborated utilizing FE analysis, which inherently considers the size effect and can be used for fatigue life prediction of components with arbitrary shapes. Model validation and comparison are carried out using experimental data of GH4169, TC4 and TC11 alloys with various specimen geometries as well as a full-scale compressor disc. Results indicate that the proposed model presents better prediction accuracy than the other three traditional methods.

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