Crack branching: A ""twin-crack"" model based on macroscopic energy fracture criteria

Theocaris, PS; Andrianopoulos, NP; Kourkoulis, SK

dc.contributor.author	Theocaris, PS	en
dc.contributor.author	Andrianopoulos, NP	en
dc.contributor.author	Kourkoulis, SK	en
dc.date.accessioned	2014-03-01T01:07:24Z
dc.date.available	2014-03-01T01:07:24Z
dc.date.issued	1989	en
dc.identifier.issn	0013-7944	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/9982
dc.subject.classification	Mechanics	en
dc.subject.other	Fracture Mechanics	en
dc.subject.other	Mathematical Models	en
dc.subject.other	Mechanical Variables Measurement--Angles	en
dc.subject.other	Crack Branching Phenomenon	en
dc.subject.other	Macroscopic Fracture Criteria	en
dc.subject.other	Running Cracks	en
dc.subject.other	Two Symmetric Microcracks	en
dc.subject.other	Materials	en
dc.title	Crack branching: A ""twin-crack"" model based on macroscopic energy fracture criteria	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0013-7944(89)90271-3	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0013-7944(89)90271-3	en
heal.language	English	en
heal.publicationDate	1989	en
heal.abstract	An improved approach for the prediction of the branching angle of running cracks is presented. It is based on the assumption that from the early steps of propagation, ahead of the running main crack-tip a tuft of microcracks is formed, from which two symmetric microcracks prevail over the others at the final steps before macroscopic branching. Further expansion of these two microcracks, which can be predicted by existing macroscopic fracture criteria, results in macroscopic branching. The unknown initial orientation of the two dominant microcracks represents the stochastic part of the whole branching phenomenon, while the main crack geometry, velocity and external load refer to the deterministic part. The results obtained by applying the T-criterion for the expected branching angle show a satisfactory agreement with existing experimental data. © 1989.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Engineering Fracture Mechanics	en
dc.identifier.doi	10.1016/0013-7944(89)90271-3	en
dc.identifier.isi	ISI:A1989CF62200011	en
dc.identifier.volume	34	en
dc.identifier.issue	5-6	en
dc.identifier.spage	1097	en
dc.identifier.epage	1107	en