The COD and SIF variations along the deformed crack front of an edge-cracked thick plate

Theocaris, PS

dc.contributor.author	Theocaris, PS	en
dc.date.accessioned	2014-03-01T01:07:17Z
dc.date.available	2014-03-01T01:07:17Z
dc.date.issued	1988	en
dc.identifier.issn	00137944	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/9903
dc.title	The COD and SIF variations along the deformed crack front of an edge-cracked thick plate	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0013-7944(88)90083-5	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0013-7944(88)90083-5	en
heal.publicationDate	1988	en
heal.abstract	An experimental study based on interferometry and caustics was undertaken to study the form of the deformed crack front in a moderately thick plate containing a natural edge crack and the variation of crack opening displacements (CODs) at the close vicinity of this front. For this purpose compact tension specimens made of a pure epoxy resin were submitted to simple tension and studied by the interferometric method. It was shown that the front of the deformed crack followed a quadric line whereas the values of CODs at different sections parallel to the mid-surface of the plate may be best approximated to logarithmic curves. The values of CODs at these sections allowed the accurate evaluation of the variation of the KI-stress intensity factor. Experiments with caustics formed inside the thickness of the aluminized plate in advance parallel sections of the plate corroborated the results for the SIFs. It was concluded that the precracked thick plate presented before loading a substantial COD inside the external lips of the crack. Moreover, the COD values due exclusively to loading of the cracked plate followed patterns indicating clearly that a significant layer inside the plate is under plane strain conditions whereas the outside boundary layers, where a strongly triaxial state of stress is dominant, were much thicker than those anticipated by different theories. © 1988.	en
heal.journalName	Engineering Fracture Mechanics	en
dc.identifier.doi	10.1016/0013-7944(88)90083-5	en
dc.identifier.volume	31	en
dc.identifier.issue	3	en
dc.identifier.spage	395	en
dc.identifier.epage	403	en