The caustic as a means to define the core region in brittle fracture

Theocaris, PS

dc.contributor.author	Theocaris, PS	en
dc.date.accessioned	2014-03-01T01:05:59Z
dc.date.available	2014-03-01T01:05:59Z
dc.date.issued	1981	en
dc.identifier.issn	0013-7944	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/9106
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0019526767&partnerID=40&md5=308ae862e0ba279aec46bc96c1634108	en
dc.subject.classification	Mechanics	en
dc.subject.other	FRACTURE MECHANICS	en
dc.title	The caustic as a means to define the core region in brittle fracture	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1981	en
heal.abstract	The core region, introduced recently to define the area of evaluation of the different criteria in brittle fracture is only up-to-now intuitively fixed by using some guidance from theories taking the respective critical radius into account. Using the method of caustics and applying an inverse procedure to evaluate from the caustic its generatrix curve it may be shown that this curve is the limiting boundary including always the non-linear elastic (or plastic) zone surrounding the crack tip. By defining this initial curve, which for isotropic and homogeneous elastic materials is always a circle, the core region is defined where the various fracture criteria may be applied with high accuracy. Extensive experimental and numerical evidence indicated the validity of this definition. Furthermore, the sizes of the core region defined by the method of caustics are in agreement with values indicated in the literature. © 1981.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Engineering Fracture Mechanics	en
dc.identifier.isi	ISI:A1981LK28000006	en
dc.identifier.volume	14	en
dc.identifier.issue	2	en
dc.identifier.spage	353	en
dc.identifier.epage	362	en