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Criterion for crack initiation in glassy polymers subjected to a composite-like stress state
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.ORCID-id: 0000-0003-0630-2037
Luleå tekniska universitet.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik.ORCID-id: 0000-0003-1871-4020
1996 (engelsk)Inngår i: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 11, s. 1291-1301Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
1996. Vol. 11, s. 1291-1301
HSV kategori
Forskningsprogram
Polymera konstruktionsmaterial
Identifikatorer
URN: urn:nbn:se:ltu:diva-7193DOI: 10.1016/S0266-3538(96)00090-5ISI: A1996WE05100007Scopus ID: 2-s2.0-0030291888Lokal ID: 584d0e50-bb59-11db-b560-000ea68e967bOAI: oai:DiVA.org:ltu-7193DiVA, id: diva2:980082
Merknad
Godkänd; 1996; 20070213 (cira)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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