Relaxation phenomena of electrical signal emissions from rock following application of abrupt mechanical stress

dc.contributor.author	Τριάντης, Δήμος Α.	el
dc.contributor.author	Βαλλιανάτος, Φίλιππος	el
dc.contributor.author	Σταύρακας, Ηλίας	el
dc.contributor.author	Χλούπης, Γεώργιος Π.	el
dc.date.accessioned	2015-05-16T11:39:04Z
dc.date.available	2015-05-16T11:39:04Z
dc.date.issued	2015-05-16
dc.identifier.uri	http://hdl.handle.net/11400/10518
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες	*
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/us/	*
dc.source	http://www.ingv.it/	en
dc.subject	Electric current relaxation phenomena
dc.subject	Rock fracture
dc.subject	mechanical stress
dc.subject	PSC
dc.subject	Amphibolite
dc.subject	Φαινόμενα χαλάρωσης ηλεκτρικού ρεύματος
dc.subject	Θραύση βράχου
dc.subject	Μηχανική καταπόνηση
dc.subject	Αμφιβολίτες
dc.title	Relaxation phenomena of electrical signal emissions from rock following application of abrupt mechanical stress	en
heal.type	journalArticle
heal.classification	Technology
heal.classification	Electrical engineering
heal.classification	Τεχνολογία
heal.classification	Ηλεκτρολογία Μηχανολογία
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh85133147
heal.classificationURI	http://zbw.eu/stw/descriptor/18426-4
heal.classificationURI	N/A-Τεχνολογία
heal.classificationURI	N/A-Ηλεκτρολογία Μηχανολογία
heal.keywordURI	http://lod.nal.usda.gov/1734
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh85004613
heal.identifier.secondary	DOI: 10.4401/ag-5316
heal.language	en
heal.access	campus
heal.publicationDate	2012
heal.bibliographicCitation	TRIANTIS, D.A., VALLIANATOS, F., STAVRAKAS, I. & HLOUPIS, G.P. (2012). Relaxation phenomena of electrical signal emissions from rock following application of abrupt mechanical stress. Annals of Geophysics. [Online] 55 (1). p. 207-212. Available from: http://www.ingv.it/	en
heal.abstract	The emission of electrical signals during application of mechanical stress to brittle geo-materials (the so-called pressure-stimulated current; PSC) can provide significant information regarding the mechanical status of a studied rock sample. PSCs originate as a result of the opening of cracks and microfractures in rock. In this study, such electrical signal emissions are detected and studied when rock samples are subjected to step-wise mechanical stress, increased from low stress levels σ L up to higher stress levels σ H. This increase is performed at high stress rates and consequently the stress is maintained practically constant for a long period. During this time, the applied stress reaches its maximum value, and the emitted PSC decays gradually and relaxes back to a minimum value. The conducted experiments suggest that the characteristics of the relaxation processes of the PSC depend directly on the high level of the applied stress that is maintained constant after the application of each stress step. Analysis of the macroscopic parameters that characterize the relaxation phenomenon of the PSC provides clear information regarding the proximity of the applied stress to the fracture limit of the rock sample.	en
heal.publisher	Istituto Nazionale di Geofisica e Vulcanologia	it
heal.journalName	Annals of Geophysics	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true