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Method for Predicting Crack Initiation Life of Notched Specimen Based on Damage Mechanics

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Abstract

Based on the theory of damage mechanics, a method for fatigue crack initiation life prediction of notched components is proposed in this paper. The damage evolution equation of notched specimen under tensioncompression loading is obtained in term of closed-form solution. The crack initiation life of notched specimen is estimated by the proposed method even when material and stress concentration factor are different. It has been verified that the result calculated by the proposed method agrees with the experimental result. The proposed method is concise, effective and feasible to practical application.

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Authors and Affiliations

  1. School of Mechanical and Electronical Engineering, Lanzhou University of Technology, Lanzhou, 730050, China

    Jianhui Liu  (刘俭辉), Yaobing Wei  (韦尧兵), Changfeng Yan  (剡昌锋) & Shanshan Lang  (郎珊珊)

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  1. Jianhui Liu  (刘俭辉)
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  2. Yaobing Wei  (韦尧兵)
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  3. Changfeng Yan  (剡昌锋)
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  4. Shanshan Lang  (郎珊珊)
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Corresponding author

Correspondence to Yaobing Wei  (韦尧兵).

Additional information

Foundation item: the National Natural Science Foundation of China (Nos. 51605212 and 51665028), and the Natural Science Foundation of Gansu Province (No. 17JR5RA122)

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Liu, J., Wei, Y., Yan, C. et al. Method for Predicting Crack Initiation Life of Notched Specimen Based on Damage Mechanics. J. Shanghai Jiaotong Univ. (Sci.) 23, 286–290 (2018). https://doi.org/10.1007/s12204-017-1900-y

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  • DOI: https://doi.org/10.1007/s12204-017-1900-y

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