The size of plastic zones in cracked plates made of polycarbonate - The influence of the ratio of thickness to crack length on the size of plastic zones in polycarbonate plates was studied

Theocaris, PS; Gdoutos, EE

dc.contributor.author	Theocaris, PS	en
dc.contributor.author	Gdoutos, EE	en
dc.date.accessioned	2014-03-01T01:05:34Z
dc.date.available	2014-03-01T01:05:34Z
dc.date.issued	1975	en
dc.identifier.issn	00144851	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/8879
dc.subject	bisphenol a	en
dc.subject	Three Dimensional	en
dc.subject	Yield Stress	en
dc.subject.other	POLYCARBONATES	en
dc.title	The size of plastic zones in cracked plates made of polycarbonate - The influence of the ratio of thickness to crack length on the size of plastic zones in polycarbonate plates was studied	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/BF02319142	en
heal.identifier.secondary	http://dx.doi.org/10.1007/BF02319142	en
heal.publicationDate	1975	en
heal.abstract	The influence of the thickness of a cracked plate, made of Polycarbonate of Bisphenol A, on the plastic zones developed at the crack tip was studied. The three-dimensional character of yielding at the vicinity of the crack tip is revealed. The study of the thickness variation in the plastic zones is made by applying the shadow-moiré method. It has been derived that the thickness variation in the plastic zones is discontinuous with successive dimples of different thickness. The influence of the overall thickness of the specimen on the size and length of the plastic zone was studied for different crack lengths. Irwin's theory for small yielding, as well as the simple and modified Dugdale-Barenblatt models, were applied for the study of plastic zones. By comparing the plastic-zone lengths in relation to their shape, with those given by the above theories, it may be concluded that, for small loads where the applied stress σ is not exceeding 0.40 of the yield stress {Mathematical expression} in tension and small values of the ratio of crack length a to plate thickness t, (a/t<4) a state of plane strain dominates at the vicinity of the crack tip, while, by increasing the load and ratio a/t, the plastic zones approach in shape and size those given by the modified Dugdale-Barenblatt model. © 1975 Society for Experimental Mechanics, Inc.	en
heal.publisher	Kluwer Academic Publishers	en
heal.journalName	Experimental Mechanics	en
dc.identifier.doi	10.1007/BF02319142	en
dc.identifier.volume	15	en
dc.identifier.issue	5	en
dc.identifier.spage	169	en
dc.identifier.epage	176	en