Simple constitutive modelling of nonlinear viscoelasticity under general extension

Tsenoglou, CJ; Voyiatzis, E; Gotsis, AD

dc.contributor.author	Tsenoglou, CJ	en
dc.contributor.author	Voyiatzis, E	en
dc.contributor.author	Gotsis, AD	en
dc.date.accessioned	2014-03-01T01:25:09Z
dc.date.available	2014-03-01T01:25:09Z
dc.date.issued	2006	en
dc.identifier.issn	0377-0257	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17561
dc.subject	Alignment strength	en
dc.subject	Biaxial	en
dc.subject	Branching	en
dc.subject	Constitutive relation	en
dc.subject	Elongation	en
dc.subject	Extension	en
dc.subject	Eyring plasticity	en
dc.subject	Melt strength	en
dc.subject	Nonlinear	en
dc.subject	Planar	en
dc.subject	Polymer	en
dc.subject	Strain damping function	en
dc.subject	Uniaxial	en
dc.subject	Viscoelasticity	en
dc.subject.classification	Mechanics	en
dc.subject.other	Damping	en
dc.subject.other	Deformation	en
dc.subject.other	Incompressible flow	en
dc.subject.other	Macromolecules	en
dc.subject.other	Strain hardening	en
dc.subject.other	Stresses	en
dc.subject.other	Alignment strength	en
dc.subject.other	Constitutive relation	en
dc.subject.other	Eyring plasticity	en
dc.subject.other	Melt strength	en
dc.subject.other	Strain damping function	en
dc.subject.other	Viscoelasticity	en
dc.subject.other	Damping	en
dc.subject.other	Deformation	en
dc.subject.other	Incompressible flow	en
dc.subject.other	Macromolecules	en
dc.subject.other	Strain hardening	en
dc.subject.other	Stresses	en
dc.subject.other	Viscoelasticity	en
dc.title	Simple constitutive modelling of nonlinear viscoelasticity under general extension	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.jnnfm.2006.05.002	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.jnnfm.2006.05.002	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	We study the behaviour of a single integral constitutive equation, capable of providing analytic expressions for the viscoelastic stress in extensional flows of a variety of deformation histories and geometries, ranging from uniaxial to equibiaxial. It is based on the use of a stress damping function, with a power-law dependence on the elongation, lambda: h(lambda) = 1/lambda(n). The parameter n (0 <= n <= 2) signifies the nonlinear viscoelastic character of the material and, therefore, is an inverse measure of network connectivity strength of the underlying microstructure. This renders the constitutive approach applicable to incompressible polymers of a variable degree of branching, strain hardening and stress thinning behavior. Methods of connecting n with the macromolecular architecture and the alignment strength of the flow are also explored. (c) 2006 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Journal of Non-Newtonian Fluid Mechanics	en
dc.identifier.doi	10.1016/j.jnnfm.2006.05.002	en
dc.identifier.isi	ISI:000240846200004	en
dc.identifier.volume	138	en
dc.identifier.issue	1	en
dc.identifier.spage	33	en
dc.identifier.epage	43	en