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Criterion for crack initiation in glassy polymers subjected to a composite-like stress state
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Luleå tekniska universitet.
Luleå University of Technology, Department of Engineering Sciences and Mathematics.ORCID iD: 0000-0003-1871-4020
1996 (English)In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 11, p. 1291-1301Article in journal (Refereed) Published
Abstract [en]

Three epoxy systems of interest as composite matrix materials are examined for their yielding and failure behavior under uniaxial, biaxial and triaxial stress states. Yield criteria applicable to glassy polymers, i.e. accounting for the hydrostatic stress effect on the deviatoric stress to yielding, are assessed. It is found that under stress states resembling those in matrix constrained between fibers, e.g. equibiaxial and equitriaxial tension, yielding is suppressed while brittle failure, presumably caused by crack growth from cavitation, occurs. A criterion for this mode of failure is proposed as the critical dilatational strain energy density. Experimental data are found to support this criterion.

Place, publisher, year, edition, pages
1996. Vol. 11, p. 1291-1301
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-7193DOI: 10.1016/S0266-3538(96)00090-5Local ID: 584d0e50-bb59-11db-b560-000ea68e967bOAI: oai:DiVA.org:ltu-7193DiVA: diva2:980082
Note
Godkänd; 1996; 20070213 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-01-16Bibliographically approved

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