The Brazilian disc under parabolically varying load: Theoretical and experimental study of the displacement field

Kourkoulis, SK; Markides, CF; Chatzistergos, PE

dc.contributor.author	Kourkoulis, SK	en
dc.contributor.author	Markides, CF	en
dc.contributor.author	Chatzistergos, PE	en
dc.date.accessioned	2014-03-01T02:14:48Z
dc.date.available	2014-03-01T02:14:48Z
dc.date.issued	2012	en
dc.identifier.issn	00207683	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30123
dc.subject	Brazilian disc test	en
dc.subject	Complex potentials	en
dc.subject	Contact problems	en
dc.subject	Digital image correlation (DIC)	en
dc.subject	Marble	en
dc.subject	PMMA	en
dc.subject.other	Complex potentials	en
dc.subject.other	Contact problems	en
dc.subject.other	Digital image correlations	en
dc.subject.other	Disc tests	en
dc.subject.other	PMMA	en
dc.subject.other	Disks (machine components)	en
dc.subject.other	Image analysis	en
dc.subject.other	Marble	en
dc.subject.other	Rock mechanics	en
dc.subject.other	Strain measurement	en
dc.subject.other	Displacement measurement	en
dc.title	The Brazilian disc under parabolically varying load: Theoretical and experimental study of the displacement field	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.ijsolstr.2011.12.013	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.ijsolstr.2011.12.013	en
heal.publicationDate	2012	en
heal.abstract	The displacement field in an intact Brazilian disc under the influence of a parabolically varying radial pressure distribution acting along two symmetric arcs of its periphery is studied. The specific loading type closely approaches the actual load-distribution as obtained by considering the specimen and the load platen as a system of two elastic bodies in contact. The problem is solved adopting the complex potentials method and a closed form full-field solution is proposed. The results of the theoretical analysis for discs made either from Dionysos marble or PMMA are considered in juxtaposition to the respective ones obtained for uniform radial pressure as well as for concentrated point load. Critical points related to the variation of the displacement field in the immediate vicinity of the load platen-specimen interface are enlightened. The accuracy of the solution is assessed by comparing the analytic results with the experimental ones obtained from series of Brazilian-disc tests carried out using the standardized device suggested by the international society for rock mechanics. The specimens were made from PMMA and the 3D digital image correlation technique was employed for measuring the components of the displacement field developed. It is proved that the experimental results are in very good qualitative and quantitative agreement with the theoretical predictions. © 2012 Elsevier Ltd. All rights reserved.	en
heal.journalName	International Journal of Solids and Structures	en
dc.identifier.doi	10.1016/j.ijsolstr.2011.12.013	en
dc.identifier.volume	49	en
dc.identifier.issue	7-8	en
dc.identifier.spage	959	en
dc.identifier.epage	972	en