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 Stress distribution along broken fibres in polymer-matrix composites
Please use this identifier to cite or link to this item http://hdl.handle.net/10773/5395

title: Stress distribution along broken fibres in polymer-matrix composites
authors: Morais, Alfredo Balacó de
keywords: Polymer matrix composites
Stress transfer
Finite element analysis
Ineffective length
issue date: 2001
publisher: Elsevier
abstract: This paper presents a model to predict the stress distribution along a broken fibre of a unidirectional composite. It is assumed that the matrix behaves in an elastic-perfectly plastic manner, and that the interfacial shear strength is not lower than the matrix shear yield stress. Although "good" interface bonding is assumed, the present analysis suggests that interface debonding may occur due to local matrix shear failure, resulting in the well-known splitting phenomenon observed in tensile tests. Along the debonded length, a decreasing interfacial shear stress is derived from Poisson contractions and Coulomb friction. The debond is followed by a matrix yielding zone, where the interfacial shear stress is assumed equal to the matrix shear yield stress. There is, finally, an elastic zone, where the interfacial shear stress follows a classical exponential law. The present model is in good agreement with a 3D finite element model.
URI: http://hdl.handle.net/10773/5395
ISSN: 0266-3538
publisher version/DOI: http://dx.doi.org/10.1016/S0266-3538(01)00058-6
source: Composites Science and Technology
appears in collectionsMEC - Artigos

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