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Nonlinear viscoelastic, viscoplastic characterization of unidirectional GF/EP composite
Luleå tekniska universitet.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0001-9649-8621
2003 (English)In: Mechanics of time-dependant materials, ISSN 1385-2000, E-ISSN 1573-2738, Vol. 7, no 3-4, p. 269-290Article in journal (Refereed) Published
Abstract [en]

Viscoplastic strains of unidirectional continuous fiber composite (HEXCEL GF/EPprepreg system) are studied experimentally and theoretically. Creep and strainrecovery tests are used. Schapery's nonlinear viscoelastic viscoplasticconstitutive equations are used and generalized to describe inelastic behavior ofunidirectional composite under isothermal creep and strain recovery conditions. Themethodology to quantify the viscoplastic strains with respect to applied stress isproposed. Viscoplastic strains of composite are described by plastic shear strain inmaterial symmetry axis. Assumptions has been used and validated that the functiondescribing the stress and time dependence of viscoplastic strain can be presented asa product of two, time and correspondingly stress dependent, master curves.

Place, publisher, year, edition, pages
2003. Vol. 7, no 3-4, p. 269-290
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-2965DOI: 10.1023/B:MTDM.0000007200.09040.d1Local ID: 0b617f60-8f56-11db-8975-000ea68e967bOAI: oai:DiVA.org:ltu-2965DiVA: diva2:975820
Note
Validerad; 2003; 20061219 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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