Blunting phenomena in cracked ductile plates under mixed mode conditions

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dc.contributor.author Theocaris, PS en
dc.date.accessioned 2014-03-01T01:07:05Z
dc.date.available 2014-03-01T01:07:05Z
dc.date.issued 1988 en
dc.identifier.issn 00137944 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/9787
dc.subject Mixed Mode en
dc.title Blunting phenomena in cracked ductile plates under mixed mode conditions en
heal.type journalArticle en
heal.identifier.primary 10.1016/0013-7944(88)90070-7 en
heal.identifier.secondary http://dx.doi.org/10.1016/0013-7944(88)90070-7 en
heal.publicationDate 1988 en
heal.abstract The mode of blunting of the tips in cracked ductile plates was experimentally and graphically studied by assuming plane-stress conditions in the cracked plates and small scale yielding developed at the crack front. The material is supposed to be elastic-perfectly plastic, plastically incompressible. Oblique edge cracks, of different angles β of obliquity, created mixed mode conditions of loading. The experimental study was executed in a scanning electron microscope and the specimens used were made of polycarbonate. By applying a progressively increasing tensile load to an initially sawn oblique edge-crack, the various steps of development of blunting of crack tips was recorded and studied. The experimental results checked with the results derived by tracing the slip-line field for the various angles β of obliquity and for plane-stress conditions. Experimental evidence helped to form the respective slip-line fields for blunted cracks and indicated that the forms of blunting for plane-stress are different from the ""Japanese-sword"" types of blunting for plane strain. The forms of the plastically deformed crack tips indicated the certain existence of corners which supported previous assumptions of very rapid radial stress changes resembling to stress jumps. It was also shown that the positions of these tail-jumps in σrr-stresses coincided with the deformed flanks of the blunted cracks thus yielding a reasonable explanation of these lines being coincident with the deformed boundaries. © 1988. en
heal.journalName Engineering Fracture Mechanics en
dc.identifier.doi 10.1016/0013-7944(88)90070-7 en
dc.identifier.volume 31 en
dc.identifier.issue 2 en
dc.identifier.spage 255 en
dc.identifier.epage 270 en

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