A theory for yield phenomenon of glassy polymers based on the strain non-uniformity under loading conditions

Spathis, G

dc.contributor.author	Spathis, G	en
dc.date.accessioned	2014-03-01T01:27:48Z
dc.date.available	2014-03-01T01:27:48Z
dc.date.issued	2008	en
dc.identifier.issn	0022-2461	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18584
dc.subject	Distribution Function	en
dc.subject	Free Volume	en
dc.subject	Microstructures	en
dc.subject	Plastic Deformation	en
dc.subject	Thermal Activation	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	ABS resins	en
dc.subject.other	Deformation	en
dc.subject.other	Distribution functions	en
dc.subject.other	Free volume	en
dc.subject.other	Photoresists	en
dc.subject.other	Polymers	en
dc.subject.other	Activated processes	en
dc.subject.other	Amorphous glassy polymers	en
dc.subject.other	Deformation processes	en
dc.subject.other	Density distribution functions	en
dc.subject.other	Density fluctuations	en
dc.subject.other	Glassy polymers	en
dc.subject.other	Glassy states	en
dc.subject.other	Loading conditions	en
dc.subject.other	Microstructural	en
dc.subject.other	Model parameters	en
dc.subject.other	Strain inhomogeneity	en
dc.subject.other	Strain softening	en
dc.subject.other	Yield phenomenons	en
dc.subject.other	Polymeric glass	en
dc.title	A theory for yield phenomenon of glassy polymers based on the strain non-uniformity under loading conditions	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s10853-008-2989-z	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s10853-008-2989-z	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	In this work, the yield phenomenon and its related features have been investigated under the concept of strain inhomogeneity, emerged inside the material during deformation processes. This strain non-uniformity in glassy polymers is either a direct consequence of the local microstructural density fluctuations existing in such materials or is the result of the manner by which the free volume is frozen in the glassy state. Assuming a simple strain density distribution function, the rate of plastic deformation can be extracted without any further assumption on a molecular conformational base or any other thermal activated process. The two model parameters required have a physical base related with the magnitude of the free volume and its fluctuation in glassy polymers. Appling this theory on the experimental results for three representative amorphous glassy polymers (PMMA, PS, and PC), all features of yield process, including strain softening effect, are easily described. © 2008 Springer Science+Business Media, LLC.	en
heal.publisher	SPRINGER	en
heal.journalName	Journal of Materials Science	en
dc.identifier.doi	10.1007/s10853-008-2989-z	en
dc.identifier.isi	ISI:000260957700023	en
dc.identifier.volume	43	en
dc.identifier.issue	22	en
dc.identifier.spage	7192	en
dc.identifier.epage	7202	en