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An homogenization procedure for the description of pre- and post-yielding stages of isotropic polymer composites

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dc.contributor.author Pandermarakis, ZG en
dc.contributor.author Spathis, G en
dc.date.accessioned 2014-03-01T01:27:54Z
dc.date.available 2014-03-01T01:27:54Z
dc.date.issued 2008 en
dc.identifier.issn 0272-8397 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/18624
dc.subject.classification Materials Science, Composites en
dc.subject.classification Polymer Science en
dc.subject.other ABS resins en
dc.subject.other Carbon fiber reinforced plastics en
dc.subject.other Composite materials en
dc.subject.other Hardening en
dc.subject.other Matrix algebra en
dc.subject.other Polymers en
dc.subject.other Reinforcement en
dc.subject.other Strain hardening en
dc.subject.other Stresses en
dc.subject.other Yield stress en
dc.subject.other Homogenization procedure en
dc.subject.other Poly mer composites en
dc.subject.other Systematic study en
dc.subject.other Strain rate en
dc.title An homogenization procedure for the description of pre- and post-yielding stages of isotropic polymer composites en
heal.type journalArticle en
heal.identifier.primary 10.1002/pc.20489 en
heal.identifier.secondary http://dx.doi.org/10.1002/pc.20489 en
heal.language English en
heal.publicationDate 2008 en
heal.abstract There will be integrated and provided a complete set of relations for an exact description of the whole mechanical behavior of a composite, i.e. from low to high deformations and stresses. The results from an extended homogenization procedure will be presented here, starting from the fact that the basic material - polymer matrix - presents viscoelastic and viscoplastic response. Analyzing the results from a unidirectional compression loading of an isotropic polymer composite, we found a characteristic enhancement of yield stress and also a distinct hardening stage: Features that generally are absent from similar test sets of unidirectional tension loading. The need for a more systematic study of this loading case in order to explain and describe correctly this inversion/asymmetry in relation to tension reference case, led us to the identification of a yielding stress impetus quantity: k = xl(s + a p), a critical stressed area, and to a true strain rate of loading matrix and reinforcement. We found that only by knowing the interaction between them and the entire equations set that controls the corresponding quantities, we will be able to describe correctly the real behavior of composites, i.e. their viscoelastic, visco-plastic, strain softening, and strain hardening response. © 2008 Society of Plastics Engineers. en
heal.publisher JOHN WILEY & SONS INC en
heal.journalName Polymer Composites en
dc.identifier.doi 10.1002/pc.20489 en
dc.identifier.isi ISI:000258746200005 en
dc.identifier.volume 29 en
dc.identifier.issue 9 en
dc.identifier.spage 978 en
dc.identifier.epage 991 en


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