Theory for the plastic deformation of glassy polymers

Spathis, G

dc.contributor.author	Spathis, G	en
dc.date.accessioned	2014-03-01T01:13:28Z
dc.date.available	2014-03-01T01:13:28Z
dc.date.issued	1997	en
dc.identifier.issn	0022-2461	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12494
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0031122025&partnerID=40&md5=54a0dedf86c00285125ef61c4e7279ea	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Computational methods	en
dc.subject.other	Differential equations	en
dc.subject.other	Plastic deformation	en
dc.subject.other	Polycarbonates	en
dc.subject.other	Polymethyl methacrylates	en
dc.subject.other	Pressure effects	en
dc.subject.other	Shear stress	en
dc.subject.other	Viscous flow	en
dc.subject.other	Transition state theory	en
dc.subject.other	Polymeric glass	en
dc.title	Theory for the plastic deformation of glassy polymers	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1997	en
heal.abstract	We present a theory to account for how a stress field can induce plastic flow in glassy polymers. We consider a molecular model in which chains are constituted from isotropic oriented elementary links embedded in a deforming continuum. The shear-stress field causes a redistribution of such links governed by a balance equation in orientation space. After detail calculations of the number of oriented units in certain directions, the net jump rate of the molecular links is given by an exponential form, according to the transition state theories of Adam and Gibbs [6]. These considerations are compared with the study of Boyce et al. [5] that included the effects of deformation rate, pressure and strain softening. The calculation of the plastic properties for polymethyl methacrylate and polycarbonate for various types of deformation has been made, and the corresponding results fitted the experimental data reasonably well.	en
heal.publisher	CHAPMAN HALL LTD	en
heal.journalName	Journal of Materials Science	en
dc.identifier.isi	ISI:A1997WU94800036	en
dc.identifier.volume	32	en
dc.identifier.issue	7	en
dc.identifier.spage	1943	en
dc.identifier.epage	1950	en