Lefm brittle and ductile fractures as described by the T-criterion

Andrianopoulos, NP; Theocaris, PS

dc.contributor.author	Andrianopoulos, NP	en
dc.contributor.author	Theocaris, PS	en
dc.date.accessioned	2014-03-01T01:39:25Z
dc.date.available	2014-03-01T01:39:25Z
dc.date.issued	1988	en
dc.identifier.issn	00137944	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/22775
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0023839583&partnerID=40&md5=319b0c0401e51f1a640c71123e437f53	en
dc.subject.other	FAILURE ANALYSIS	en
dc.subject.other	POLYMETHYL METHACRYLATE - Mechanical Properties	en
dc.subject.other	FRACTURE INITIATION	en
dc.subject.other	PLASTICALLY DEFORMED ZONE	en
dc.subject.other	SINGULAR-STRESS FIELDS	en
dc.subject.other	UNBOUNDED PLASTICITY EXPANSION	en
dc.subject.other	FRACTURE MECHANICS	en
dc.title	Lefm brittle and ductile fractures as described by the T-criterion	en
heal.type	journalArticle	en
heal.publicationDate	1988	en
heal.abstract	Fracture is connected with limited amounts of plastic expansion, else materials fail by general yielding. This obvious presupposition of fracture may take two limiting algebraic expressions corresponding to extreme brittle and extreme ductile cases, respectively. These two expressions are inserted into the formulation of the T-criterion of fracture. The first (brittle) expression results in predictions for the critical fracture stress similar to those of the existing 'brittle' fracture criteria. The second (ductile) one coincides with the existing 'ductile' version of the T-criterion. Experimental evidence gathered from ductile materials agrees well with the 'ductile' version of this criterion, the same being not true in the case of ""brittle"" criteria when their predictions are compared with the results from a typical brittle material (PMMA). Finally, a discussion, based on the experimental results, is presented, showing that the assumption of a constant radius of the so-called 'core-region' or plastic zone in case of brittle materials seems to be misleading. © 1988.	en
heal.journalName	Engineering Fracture Mechanics	en
dc.identifier.volume	30	en
dc.identifier.issue	1	en
dc.identifier.spage	5	en
dc.identifier.epage	12	en