Crack onset and growth at the fibre–matrix interface under a remote biaxial transverse load. Application of a coupled stress and energy criterion

Understanding matrix failure in LFRP composites is one of the main challenges when developing failure criteria for these materials. This work aims to study the influence of the secondary transverse load on the crack initiation at micro-scale. Four non-classical approaches of fracture mechanics are used to model the onset of fibre-matrix interface debonds: Linear Elastic Brittle Interface Model (LEBIM), an Energetic Approach for the Linear Elastic Brittle Interface Model (EA-LEBIM), an Energetic Approach for the bilinear Cohesive Zone Model (EA-CZM) and the Coupled Criterion of the Finite Fracture Mechanics (CC-FFM). Results obtained by these approaches predict that, for brittle fibre-matrix configurations, a secondary transverse compression reduces the critical value of the main transverse tension leading to the debond onset. This fact is not taken into account by the currently used failure criteria

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Fibre/matrix interface failure controlled by a critical energy criterion

Composites ◽

10.1016/0010-4361(91)90202-r ◽

1991 ◽

Vol 22 (6) ◽

pp. 445-447 ◽

Cited By ~ 1

Author(s):

P. Marshall ◽

J. Price

Keyword(s):

Energy Criterion ◽

Critical Energy ◽

Matrix Interface ◽

Interface Failure ◽

Fibre Matrix

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Characterisation of the fibre/matrix interface in reinforced polymers by the push-in technique

Composites Science and Technology ◽

10.1016/s0266-3538(96)00159-5 ◽

1997 ◽

Vol 57 (8) ◽

pp. 845-851 ◽

Cited By ~ 30

Author(s):

Gerhard Kalinka ◽

André Leistner ◽

Andreas Hampe

Keyword(s):

Matrix Interface ◽

Reinforced Polymers ◽

Fibre Matrix

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Fibre-Matrix Interface Development during High Temperature Exposition of Long Fibre Reinforced SiOC Matrix

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.592-593.401 ◽

2013 ◽

Vol 592-593 ◽

pp. 401-404

Author(s):

Zdeněk Chlup ◽

Martin Černý ◽

Adam Strachota ◽

Martina Halasova ◽

Ivo Dlouhý

Keyword(s):

High Temperature ◽

Crack Formation ◽

Fracture Behaviour ◽

Point Of View ◽

Reinforced Composites ◽

Matrix Interface ◽

Significant Damage ◽

The Matrix ◽

Fibre Matrix ◽

Fibre Reinforced Composites

The fracture behaviour of long fibre reinforced composites is predetermined mainly by properties of fibre-matrix interface. The matrix prepared by pyrolysis of polysiloxane resin possesses ability to resist high temperatures without significant damage under oxidising atmosphere. The application is therefore limited by fibres and possible changes in the fibre matrix interface. The study of development of interface during high temperature exposition is the main aim of this contribution. Application of various techniques as FIB, GIS, TEM, XRD allowed to monitor microstructural changes in the interface of selected places without additional damage caused by preparation. Additionally, it was possible to obtain information about damage, the crack formation, caused by the heat treatment from the fracture mechanics point of view.

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