Experimental evaluation of the plastic zones for steady mode-III crack growth

Theocaris, PS

dc.contributor.author	Theocaris, PS	en
dc.date.accessioned	2014-03-01T01:39:13Z
dc.date.available	2014-03-01T01:39:13Z
dc.date.issued	1987	en
dc.identifier.issn	00015970	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/22615
dc.subject.other	ELASTOPLASTICITY	en
dc.subject.other	SOLIDS - Deformation	en
dc.subject.other	DEFORMED ZONE	en
dc.subject.other	ELASTIC-PLASTIC BOUNDARY	en
dc.subject.other	LARGE SCALE YIELDING	en
dc.subject.other	PLASTIC ZONES	en
dc.subject.other	STEADY MODE-III CRACK GROWTH	en
dc.subject.other	PLATES	en
dc.title	Experimental evaluation of the plastic zones for steady mode-III crack growth	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/BF01175725	en
heal.identifier.secondary	http://dx.doi.org/10.1007/BF01175725	en
heal.publicationDate	1987	en
heal.abstract	A steady state quasi-static growth of a crack in antiplane shear in a strain hardening material was studied under small-scale yielding conditions. The extent of the plastic zone from the tip of the crack was determined as function of the size and geometry of the corresponding caustic developed around the crack tip. The method can be readily extended without considerable changes for large scale yielding. The topography of the plastically deformed zone was numerically and experimentally defined, its shape resembling a spiral ramp with its ground level coinciding with the crack axis and the two flanks of the ramp on either side of the crack axis going up or down until a complete half tour is covered. The position and characteristics of these ramps are changed, depending on the strain hardening coefficient from the elastic to purely plastic materials. As a consequence, the main crack extends by developing multiple radial microcracks following the steps of the ramps. These helical clasters of cracks straddle the main crack and prepare a new front for subsequent steps of propagation. Finally, a criterion is established relating the dimensions of the optical set-up and the mechanical and optical properties of the material ascertaining the creation of the initial curve of the caustic inside the elastic-plastic boundary of the deformed plate. © 1987 Springer-Verlag.	en
heal.publisher	Springer-Verlag	en
heal.journalName	Acta Mechanica	en
dc.identifier.doi	10.1007/BF01175725	en
dc.identifier.volume	69	en
dc.identifier.issue	1-4	en
dc.identifier.spage	271	en
dc.identifier.epage	294	en