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Probabilistic crack growth by nonlinear damage accumulation

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Abstract

A probabilistic crack growth model based on a nonlinear damage accumulation criterion is presented. The damage criterion takes cognizance of the effect of the loading sequence, and is an energy-based function. The simulation results are shown to compare favourably with experimental data of four different types of steels and an aluminum alloy. The predicted results are also compared with that of the linear damage theory and, in general, are found to be superior.

Résumé

On présente un modèle probabiliste de croissance d'une fissure, basé sur un critère d'accumulation du dommage non linéaire. Le critère d'endommagement prend en compte l'effet de la séquence de mise en charge, et est une fonction de lénergie. On montre que les résultats d'une simulation soutiennent favorablement la comparaison avec des données expérimentales, dans le cas de quatre aciers différents et d'un alliage d'aluminium. Les résultats prédits sont également comparés avec ceux que fournit la théorie du dommage linéaire et, en général, apparaissent leur être supérieurs.

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Ellyin, F., Fakinlede, C.O.A. Probabilistic crack growth by nonlinear damage accumulation. Int J Fract 36, 137–149 (1988). https://doi.org/10.1007/BF00017792

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  • DOI: https://doi.org/10.1007/BF00017792

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