The mises elastic-plastic boundary as the core region in fracture criteria

Theocaris, PS; Andrianopoulos, NP

dc.contributor.author	Theocaris, PS	en
dc.contributor.author	Andrianopoulos, NP	en
dc.date.accessioned	2014-03-01T01:06:06Z
dc.date.available	2014-03-01T01:06:06Z
dc.date.issued	1982	en
dc.identifier.issn	0013-7944	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/9167
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0019924787&partnerID=40&md5=5848489a11317303ac625e38e8355e6a	en
dc.subject.classification	Mechanics	en
dc.subject.other	FRACTURE MECHANICS	en
dc.title	The mises elastic-plastic boundary as the core region in fracture criteria	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1982	en
heal.abstract	When applying any of the fracture criteria to predict crack propagation, the evaluation of the stresses needed is performed at a constant distance r from the crack-tip The circle with radius r is called the core region. The exact value of r is not defined quantitatively. In the present paper the Mises elastic-plastic boundary is introduced to define the core region, instead of the respective circle. Thus, the value of r depends explicitly, not only on the material properties of the plate, but also on the angular direction around the crack-tip. It was shown that the introduction of a core region with variable radius affects the expected angle of propagation and, in the case of the S-criterion, results in values of this angle indepedent from Poisson's ratio. As a rational consequence of the above treatment, the minimum value of the strain-energy density is replaced by the minimum value of the radius of the elastic-plastic boundary in the role of the decisive quantity defining the direction of crack propagation. © 1982.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Engineering Fracture Mechanics	en
dc.identifier.isi	ISI:A1982NG55500010	en
dc.identifier.volume	16	en
dc.identifier.issue	3	en
dc.identifier.spage	425	en
dc.identifier.epage	432	en