Experimental and numerical study of the micro-mechanical failure in composites

Danial Ashouri Vajari, Karolina Martyniuk, Bent F. Sørensen, Brian Nyvang Legarth

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Abstract

The fibre/matrix interfacial debonding is found to be the first microscale failure mechanism leading to subsequent macroscale transverse cracks in composite materials under tensile load. In this paper, the micromechanical interface failure in fiber-reinforced composites is studied experimentally and by numerical modeling by means of the finite element analysis. Two fibers embedded in the matrix are subjected to a remote transverse tensile load (see Fig. 1a). The trapezoidal cohesive zone model proposed by Tvergaard and Hutchinson [14] is used to model the fracture of the fiber-matrix interfaces. This study is based on the comparison between the results of numerical modeling and those corresponding to the experimental tests by employing two parameters: The angle from the load direction to the crack tip and the crack normal opening. This comparison aims to investigate the interfacial properties and also assess the progressive fiber-matrix debonding by focusing on the interaction of two fibers with dissimilar interfacial strengths.
Original languageEnglish
Title of host publicationProceedings of the 19th International Conference on Composite Materials
PublisherCanadian Association for Composite Structures and Materials
Publication date2013
Pages5853-5863
ISBN (Print)978-0-9696797-1-4
Publication statusPublished - 2013
Event19th International Conference on Composite Materials - Montréal, Canada
Duration: 28 Jul 20132 Aug 2013
Conference number: 19
http://www.iccm19.org/

Conference

Conference19th International Conference on Composite Materials
Number19
CountryCanada
CityMontréal
Period28/07/201302/08/2013
Internet address

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