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Effects of a composite-like stress state on the fracture of epoxies
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-0630-2037
Luleå tekniska universitet.
Department of Solid Mechanics, Royal Institute of Technology.
1995 (English)In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 53, no 1, p. 27-37Article in journal (Refereed) Published
Abstract [en]

The strain to failure of a transversely loaded composite is much lower than for the pure matrix in uniaxial tension. Several studies of composites suggest the triaxial matrix stress state as one of the explanations. In order to investigate this experimentally, a triaxial tensile test previously used for rubbers (the poker-chip test) was successfully applied to four epoxies in the glassy state. The chosen specimen geometry mimicked the most severe stress state in the matrix as determined by finite element analysis of a transversely loaded glass-fiber/epoxy composite. The poker-chip strains to failure in the primary loading direction were 0.5-0.8%, whereas uniaxial strains to failure were 1.8-7%. The triaxial stress state in composite matrices may therefore by itself be a sufficient explanation for low values of transverse composite strains to failure

Place, publisher, year, edition, pages
1995. Vol. 53, no 1, p. 27-37
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-9538DOI: 10.1016/0266-3538(94)00075-1ISI: A1995QQ12900005Scopus ID: 2-s2.0-0028993707Local ID: 82ff9500-021c-11dc-ad0a-000ea68e967bOAI: oai:DiVA.org:ltu-9538DiVA, id: diva2:982476
Note
Godkänd; 1995; 20070514 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Asp, Leif

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