An engineering predictive approach of fatigue crack growth behavior: The case of the lug-type joint

Ahmed Bahloul; Amal Ben Ahmed; Chokri Bouraoui

doi:10.1016/j.crme.2017.10.003

An engineering predictive approach of fatigue crack growth behavior: The case of the lug-type joint

Ahmed Bahloul ¹; Amal Ben Ahmed ¹ ; Chokri Bouraoui ¹

¹ Laboratoire de mécanique de Sousse, École nationale d'ingénieurs de Sousse, Université de Sousse, BP 264, Erriadh, 4023, Sousse, Tunisia

Comptes Rendus. Mécanique, Volume 346 (2018) no. 1, pp. 1-12.

Abstract

The present attempt proposes a predictive approach of the fatigue crack growth (FCG) behavior of a lug-type joint used in an aeronautic context. The crack tip residual stress distribution and material dispersions are considered. The developed approach was implemented by coupling the Extended Finite Element Method (XFEM), the Residual Corrected Stress Intensity Factor (RC-SIF), developed by the authors, and the Monte Carlo simulation (MCS) method. The Lemaitre–Chaboche model, developed upon the ABAQUS commercial code, was considered for characterizing material behavior. The developed approach treats FCG life by considering the stochastic behavior of material parameters and the crack tip residual stress field during propagation. Comparing with experimental data, the proposed approach exhibits a good ability in evaluating the FCG reliability of a cracked lug-type joint subjected to different loading conditions. The iso-probabilistic P–a–N curves can be used as an efficient tool for ensuring the safety behavior of cracked components.

Received: 2017-09-03
Accepted: 2017-10-21
Published online: 2017-11-07

DOI: 10.1016/j.crme.2017.10.003

Mots-clés : XFEM, FCG reliability, Iso-probabilistic FCG life curves, MCS, Fatigue life prediction

Author's affiliations:

Ahmed Bahloul ¹; Amal Ben Ahmed ¹; Chokri Bouraoui ¹

¹ Laboratoire de mécanique de Sousse, École nationale d'ingénieurs de Sousse, Université de Sousse, BP 264, Erriadh, 4023, Sousse, Tunisia

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     title = {An engineering predictive approach of fatigue crack growth behavior: {The} case of the lug-type joint},
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Ahmed Bahloul; Amal Ben Ahmed; Chokri Bouraoui. An engineering predictive approach of fatigue crack growth behavior: The case of the lug-type joint. Comptes Rendus. Mécanique, Volume 346 (2018) no. 1, pp. 1-12. doi : 10.1016/j.crme.2017.10.003. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2017.10.003/

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