Influence of temperature on viscoelastic–viscoplastic behavior of poly(lactic acid) under loading–unloading

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dc.authoridDrozdov, Aleksey -- 0000-0002-6049-5813; Dusunceli, Necmi -- 0000-0002-2841-7882
dc.contributor.authorDüşünceli, Necmi
dc.contributor.authorDrozdov, Aleksey D.
dc.contributor.authorTheilgaard, Naseem
dc.date.accessioned13.07.201910:50:10
dc.date.accessioned2019-07-16T09:17:51Z
dc.date.available13.07.201910:50:10
dc.date.available2019-07-16T09:17:51Z
dc.date.issued2017
dc.departmentMühendislik Fakültesi
dc.description.abstractExperimental data are reported on poly(lactic acid) (PLA) in tensile loading-unloading tests and relaxation tests under stretching and retraction at temperatures ranging from room temperature up to 508C. Two characteristic features of the time-dependent response of PLA are revealed: (i) with a decrease in minimum stress under retraction at a fixed temperature, relaxation curves change their shape from monotonically decaying with time (simple relaxation), to non-monotonic (mixed relaxation) to monotonically increasing (inverse relaxation) and (ii) with an increase in temperature, inverse relaxation after unloading down to the zero stress evolves into mixed relaxation with a pronounced shift of the peak position to smaller relaxation times. Constitutive equations are derived for the mechanical behavior of PLA, and adjustable parameters in the stress-strain relations are found by fitting the observations. Ability of the model to predict the time-dependent response under cyclic deformation is confirmed by numerical simulation. (C) 2016 Society of Plastics Engineers
dc.description.sponsorshipEuropean Research Council [314744]
dc.description.sponsorshipContract grant sponsor: European Research Council through FP7-NMP Programme; contract grant number: 314744.
dc.identifier.doi10.1002/pen.24404
dc.identifier.endpage247en_US
dc.identifier.issn0032-3888
dc.identifier.issn1548-2634
dc.identifier.issue3en_US
dc.identifier.scopusqualityQ2
dc.identifier.startpage239en_US
dc.identifier.urihttps://doi.org/10.1002/pen.24404
dc.identifier.urihttps://hdl.handle.net/20.500.12451/4804
dc.identifier.volume57en_US
dc.identifier.wosWOS:000397033700001
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherWiley
dc.relation.ispartofPolymer Engineering and Science
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/embargoedAccess
dc.titleInfluence of temperature on viscoelastic–viscoplastic behavior of poly(lactic acid) under loading–unloading
dc.typeArticle

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