The state of stress in a perforated three-layer medium under the action of gravity

Koroneos, EG; Theocaris, PS

dc.contributor.author	Koroneos, EG	en
dc.contributor.author	Theocaris, PS	en
dc.date.accessioned	2014-03-01T01:05:39Z
dc.date.available	2014-03-01T01:05:39Z
dc.date.issued	1977	en
dc.identifier.issn	01489062	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/8921
dc.subject	Perforation	en
dc.subject.other	MODELS - Stresses	en
dc.subject.other	ROCK MECHANICS	en
dc.subject.other	STRESSES - Analysis	en
dc.subject.other	TUNNELS AND TUNNELING - Stresses	en
dc.subject.other	MOIRE METHOD	en
dc.subject.other	PLATES	en
dc.title	The state of stress in a perforated three-layer medium under the action of gravity	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0148-9062(77)90733-1	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0148-9062(77)90733-1	en
heal.publicationDate	1977	en
heal.abstract	The stress and displacement distribution in a three-layer medium which contains a circular hole in the intermediate layer under the action of gravity forces is studied. The model was made of a plasticized epoxy polymer which presents enough deformation under the influence of its own weight. The projected image Moiré method was used for the measurements of the displacements. The deformation of the model was achieved by the inversion method, where the model was freely suspended from the one extremity and left to deform by its own weight. The stress components were determined by using the linear stress-strain relations, the latter quantities being calculated by differentiating the in-plane components of the displacement. Twp particular geometries of the perforated medium were studied: in the first the circular tunnel lay at the center of the intermediate layer, while in the second, the tunnel touched the two interfaces of the intermediate layer. Graphs showing the complete stress distribution in the more sensitive intermediate layer around the tunnel are given. The stress concentration factors at the boundary of the cavity were established. Important results for the stress distribution and the influence of the geometry of the tunnel on the stress concentration factors were deduced. All these results are very useful for the design of tunnels in soil and rock. © 1977.	en
heal.journalName	International Journal of Rock Mechanics and Mining Sciences and	en
dc.identifier.doi	10.1016/0148-9062(77)90733-1	en
dc.identifier.volume	14	en
dc.identifier.issue	5-6	en
dc.identifier.spage	219	en
dc.identifier.epage	228	en