SEM investigations fo slip-line fields around blunted cracks under mixed-mode conditions

Theocaris, PS; Kytopoulos, V

dc.contributor.author	Theocaris, PS	en
dc.contributor.author	Kytopoulos, V	en
dc.date.accessioned	2014-03-01T01:08:08Z
dc.date.available	2014-03-01T01:08:08Z
dc.date.issued	1990	en
dc.identifier.issn	0022-2461	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/10298
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0025385560&partnerID=40&md5=9219da04858509d8d8d4b4d9abdf5583	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Fracture Mechanics	en
dc.subject.other	Microscopic Examination--Scanning Electron Microscopy	en
dc.subject.other	Bisphenol A	en
dc.subject.other	Crack Opening Displacement	en
dc.subject.other	Crack Tip Blunting	en
dc.subject.other	Polycarbonates	en
dc.title	SEM investigations fo slip-line fields around blunted cracks under mixed-mode conditions	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1990	en
heal.abstract	The slip-line field around the tips of cracks was studied using electron scanning microscopy. Thin and thick tension specimens made of polycarbonate were edge-cracked ensuring predominant conditions of either plane stress or plane strain. The evolution of blunting and creation of the slip-line field in the intermediate phase between blunting and initiation of slow propagation of the crack were studied under a continuously increasing loading mode. Blunting depends on the type of stress state (plane stress or plane strain), mode of loading (mode I, mixed mode), and ductility of the material. Three different types of blunting were detected, the already known round-nosed and flat-nosed modes and an intermediate type of cornered and rounded-off front of the crack. The characteristic properties are presented. The slip-line fields accompanying blunting and indicating the initiation and evolution of the plastic enclaves were detected in all types of loading and specimens using the brittle-coating technique and its variations. It is shown that not only the plastic enclaves developed during this step of loading but also the significant elastic components of stresses influence the mode of development of the respective slip-line yielding a combined type in between the Rice-Johnson field for plane strain and the Theocaris field for plane stress.	en
heal.publisher	CHAPMAN HALL LTD	en
heal.journalName	Journal of Materials Science	en
dc.identifier.isi	ISI:A1990CQ29200033	en
dc.identifier.volume	25	en
dc.identifier.issue	2 A	en
dc.identifier.spage	997	en
dc.identifier.epage	1006	en