MARTIN, Eric; LEGUILLON, D.; SEVECEK, O.; BERMEJO, Raul

doi:10.1016/j.engfracmech.2018.06.021

MARTIN, Eric
Laboratoire des Composites Thermostructuraux [LCTS]

LEGUILLON, D.

SEVECEK, O.

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Article de revue

Ce document a été publié dans

Engineering Fracture Mechanics. 2018-10-01, vol. 201, p. 167-175

Résumé en anglais

The effect of small critical flaws on the strength of polycrystalline ceramic materials is analyzed with the help of an initiation criterion combining both a stress and an energy conditions. If the size of the defect is smaller than the characteristic material length, numerical predictions reveal that the defect (either sharp or blunt) has no effect on the strength. This result is in a good agreement with experimental results obtained from the strength measurements of ceramic materials with controlled flaws. Combining two fracture tests after introducing flaws with controlled sizes enables to identify the fracture parameters of the ceramic material.< Réduire

Mots clés en anglais

Crack nucleation

Coupled criterion

Finite fracture mechanics

Tensile strength

Ceramics

URI

https://oskar-bordeaux.fr/handle/20.500.12278/124043

DOI

http://dx.doi.org/10.1016/j.engfracmech.2018.06.021

Unités de recherche

Laboratoire des Composites Thermo Structuraux (LCTS) - UMR 5801

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Understanding the tensile strength of ceramics in the presence of small critical flaws

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Résumé en anglais

Mots clés en anglais

URI

DOI

Unités de recherche