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Journal of Engineering Materials and Technology 125 (2003) 333-340

Long-Term Reliability of Brittle Materials: The Issue of Crack Arrest

Yann Charles 1, Stéphane Roux 2, François Hild 1

(2003)

In structures containing brittle materials, residual and/or heterogenous stresses may prevent cracks to propagate up to failure. Consequently, for such structures, crack arrest has to be accounted for and a weakest link hypothesis may not be applicable. A probabilistic crack propagation model is derived to describe instantaneous or delayed arrest phenomena. A time-dependent regime is induced by slow crack growth experienced by ceramics and glasses. A general expression is obtained in which instantaneous up to infinite propagation times can be modelled in a unified way. The results are illustrated on a case study dealing with propagation of cracks in a thin walled tube submitted to a temperature gradient through its thickness. Different types of propagation/arrest regimes can be identified.

1 :	Laboratoire de Mécanique et Technologie (LMT)
	CNRS : UMR8535 – Université Pierre et Marie Curie [UPMC] - Paris VI – École normale supérieure de Cachan - ENS Cachan
2 :	Surface du Verre et Interfaces (SVI)
	CNRS : UMR125

Domaine

:

Physique/Mécanique/Mécanique des matériaux Sciences de l'ingénieur/Mécanique/Mécanique des matériaux

Mots Clés : Crack propagation and arrest – Ceramics and glasses – Fracture toughness – Microstructures – Probability and statistics

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Contributeur : François Hild <>

Soumis le : Lundi 20 Septembre 2004, 17:35:32

Dernière modification le : Lundi 17 Décembre 2007, 23:09:15