Strain-analysis of neck formation and propagation in glassy polymers

Theocaris, PS; Hadjiiossiph, C

dc.contributor.author	Theocaris, PS	en
dc.contributor.author	Hadjiiossiph, C	en
dc.date.accessioned	2014-03-01T01:05:47Z
dc.date.available	2014-03-01T01:05:47Z
dc.date.issued	1979	en
dc.identifier.issn	0013-7944	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/8986
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0018310250&partnerID=40&md5=caf01af5e6735708f9689b0efc42ba2a	en
dc.subject.classification	Mechanics	en
dc.subject.other	MATHEMATICAL TECHNIQUES - Numerical Methods	en
dc.subject.other	POLYCARBONATES	en
dc.title	Strain-analysis of neck formation and propagation in glassy polymers	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1979	en
heal.abstract	The mechanism of the phenomenon of initiation and propagation of neck in polycarbonate of Bisphenol A tension specimens, which present a well-defined yield point, is analysed. A detailed analysis of the strain field in the whole specimen at definite loading steps before and during the neck initiation and propagation is undertaken by the mechanical interference (moiré) method. It was found that a strongly non-uniform strain field presenting localized maxima predominates in the neck. The three-dimensional character of this field is revealed and analysed. It was established that, as the neck propagates, the strain distribution in the necked region becomes more and more uniform, while the neck fronts tend to become normal to the boundaries of the specimen. The whole phenomenon of the initiation and evolution of the neck in polycarbonate is compared with the analogous phenomenon in metals and the similarities and differences between them are discussed and analysed. © 1979.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Engineering Fracture Mechanics	en
dc.identifier.isi	ISI:A1979HG84300011	en
dc.identifier.volume	12	en
dc.identifier.issue	2	en
dc.identifier.spage	241	en
dc.identifier.epage	252	en