Modeling of postyield behavior of glassy polymers

Kontou, E

dc.contributor.author	Kontou, E	en
dc.date.accessioned	2014-03-01T01:12:05Z
dc.date.available	2014-03-01T01:12:05Z
dc.date.issued	1996	en
dc.identifier.issn	0021-8995	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/11946
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0030244068&partnerID=40&md5=496987b96d8eebf43a71adca8aa98dd8	en
dc.subject.classification	Polymer Science	en
dc.subject.other	Amorphous materials	en
dc.subject.other	Computer simulation	en
dc.subject.other	Hydrostatic pressure	en
dc.subject.other	Nonlinear equations	en
dc.subject.other	Strain hardening	en
dc.subject.other	Strain rate	en
dc.subject.other	Thermal effects	en
dc.subject.other	Viscoelasticity	en
dc.subject.other	Yield stress	en
dc.subject.other	Activation volume tensor	en
dc.subject.other	Amorphous glassy polymers	en
dc.subject.other	Strain softening	en
dc.subject.other	Polymers	en
dc.title	Modeling of postyield behavior of glassy polymers	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1996	en
heal.abstract	The yield stress of amorphous glassy polymers depends strongly on the strain rate, temperature, and hydrostatic pressure. On the other hand, the yield criteria, valid for metals, do not describe this behavior. Therefore, the yield phenomenon of the polymeric glassy state must be mainly a nonlinear viscoelastic effect. In this work, an analysis based on the concept of activation volume tensor, described elsewhere, and using fundamental equations of nonlinear viscoelasticity, is presented. It has been confirmed that this consideration leads to a satisfactory description of the postyield behavior, including strain softening and strain hardening. The strain rate and temperature effect have also been modeled for various rates and temperatures. (C) 1996 John Wiley & Sons, Inc.	en
heal.publisher	JOHN WILEY & SONS INC	en
heal.journalName	Journal of Applied Polymer Science	en
dc.identifier.isi	ISI:A1996VC06300019	en
dc.identifier.volume	61	en
dc.identifier.issue	12	en
dc.identifier.spage	2191	en
dc.identifier.epage	2195	en