A micromechanical approach to time dependent failure of composite materials

A.A.J.M. Peijs, H.J. Schellens, L.E. Govaert

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

The fracture behavior of transversely loaded composites is investigated, assuming that fracture is matrix-dominated. Since the stress and strain state of the matrix in composite structures is complex, the yield and fracture behavior of a neat epoxy system is investigated under various multiaxial loading conditions. A good description of the multiaxial yielding behavior of the matrix material is obtained with the 3-dimensional pressure-modified Eyring equation. The parameters of this 3-dimensions yield expression are implemented into a constitutive model, which is able to describe the elastoviscoplastic behavior of polymers under complex loadings adequately. Subsequently, by means of a micromech. approach, the matrix-dominated transverse strength of a unidirectional composite material was investigated. Numerical simulations show that a failure criterion based on the max. octahedral shear strain provides a good description for the rate-dependent transverse strength of unidirectional glass/epoxy composites. Furthermore, such a strain criterion is also able to describe creep lifetime of transversely loaded unidirectional composites
Original languageEnglish
Title of host publicationProgress in durability analysis of composite systems : proceedings of the international conference, DURACOSYS '95, Brussels, July 16-21, 1995
EditorsA.H. Cardon, K.L. Reifsnider, H. Fukuda
Place of PublicationRotterdam
PublisherBalkema
Pages13-19
ISBN (Print)9789054108092
Publication statusPublished - 1996
Eventconference; Progress in durability analysis of composite systems: International Conference DURACOSYS 95, Brussels, Belgium, 16-21 July 1995; 1995-07-16; 1995-07-21 -
Duration: 16 Jul 199521 Jul 1995

Conference

Conferenceconference; Progress in durability analysis of composite systems: International Conference DURACOSYS 95, Brussels, Belgium, 16-21 July 1995; 1995-07-16; 1995-07-21
Period16/07/9521/07/95
OtherProgress in durability analysis of composite systems: International Conference DURACOSYS 95, Brussels, Belgium, 16-21 July 1995

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