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Erschienen in:
1991 | OriginalPaper | Buchkapitel
Contribution to the Fracture Analysis of Composite Materials
verfasst von : D. Leguillon, E. Sanchez-Palenia
Erschienen in: Advances in Kinetic Theory and Continuum Mechanics
Verlag: Springer Berlin Heidelberg
Enthalten in: Professional Book Archive
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Within the generalized plane elasticity framework, the computation of singularities (stress concentration), together with a matched asymptotic expansion method, allow to build solutions to various problems involving a small perturbation: rigid inclusion, micro-void,… Taking a micro-crack as small perturbation brings to the analysis of brittle fracture and to the asymptotics of the energy release rate. A Griffith criterion divides the singularities into two classes, namely the strong and weak singularities. As an example, the case of a cracked ply embedded in a stratified composite is examined. With given assumptions on the toughness of the components and of the interface, the crack can propagate to become a delamination crack (i.e. lying at the interface between the components).