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Fatigue reliability prediction of defective materials based on a useful equivalent Wöhler curve

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Abstract

The purpose of this manuscript consists in suggesting an approach able to predict the reliability of the fatigue behavior devoted to defective material. A multiaxial high cycle fatigue criterion is adopted and improved by taking into account the 3D stress gradient effect around a defect. An equivalent multiaxial stress is figured out and reported in a useful SN curve. The proposed approach gives a more secure prediction of polycyclic fatigue behavior by coupling FE analysis and Monte Carlo reliability from which practical Iso-probabilistic SN curves are deduced. An application has been made with defective C35 steel. It has been noted that the findings are in good accord with the experimental investigation and leads to a greater reliable high cycle fatigue forecasting compared to the deterministic results. This method has also been used to analyze and discuss the impact of the defect on the fatigue behavior of the structure. This coupling Fatigue reliability gives an attractive and a strong engineering fatigue forecasting for design office.

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Authors and Affiliations

  1. Laboratory of Mechanics of Sousse, National Engineering School of Sousse, University of Sousse, BP 264, Erriadh, 4023, Sousse, Tunisia

    Maroua Saggar & Chokri Bouraoui

  2. LGM, IPEIM, ENIM, Université de Monastir, Avenue Ibn Eljazzar, 5019, Monastir, Tunisia

    Anouar Nasr

Authors
  1. Maroua Saggar
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  2. Chokri Bouraoui
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  3. Anouar Nasr
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Correspondence to Maroua Saggar.

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Saggar, M., Bouraoui, C. & Nasr, A. Fatigue reliability prediction of defective materials based on a useful equivalent Wöhler curve. Int J Adv Manuf Technol 97, 1011–1021 (2018). https://doi.org/10.1007/s00170-018-1975-0

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  • DOI: https://doi.org/10.1007/s00170-018-1975-0

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