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Time dependent behavior of flax/starch composites
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0001-9649-8621
Institute of Polymer Mechanics, University of Latvia.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0002-5210-4341
VTT.
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2012 (English)In: Mechanics of time-dependant materials, ISSN 1385-2000, E-ISSN 1573-2738, Vol. 16, no 1, p. 47-70Article in journal (Refereed) Published
Abstract [en]

The time dependent mechanical response of flax fiber reinforced thermoplastic starch matrix composite and neat starch is analyzed. It is demonstrated that the response is highly sensitive with respect to the relative humidity (with specific saturation moisture content in the composite) and special effort has to be made to keep it constant. It was found that micro-damage accumulation and resulting elastic modulus reduction in this type of composites is limited. The highly nonlinear behavior of composites is related to nonlinear viscoelasticity and viscoplasticity. These phenomena are accounted for by simple material models suggested in this study. The stress dependent nonlinearity descriptors in these models are determined in creep and strain recovery tests at low as well as high stresses

Place, publisher, year, edition, pages
2012. Vol. 16, no 1, p. 47-70
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-9993DOI: 10.1007/s11043-011-9156-7ISI: 000299370600004Scopus ID: 2-s2.0-84858834181Local ID: 8bd8cde5-0de7-449e-b15d-076d2d57250bOAI: oai:DiVA.org:ltu-9993DiVA, id: diva2:982932
Note
Validerad; 2012; 20110916 (joffe)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Varna, JanisSparnins, EdgarsJoffe, Roberts

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