Understanding the fracture phenomena in inhomogeneous rock samples and ionic crystals, by monitoring the electromagnetic emission during their deformation

dc.contributor.author	Μαυρομάτου, Κλαίρη	el
dc.contributor.author	Χατζηκώντης, Βασίλειος	el
dc.contributor.author	Νίνος, Δημήτριος Κ.	el
dc.contributor.author	Μαστρογιάννης, Δήμος	el
dc.contributor.author	Χατζηκώντης, Ε.	el
dc.date.accessioned	2015-06-07T17:55:45Z
dc.date.available	2015-06-07T17:55:45Z
dc.date.issued	2015-06-07
dc.identifier.uri	http://hdl.handle.net/11400/15514
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.elsevier.com/	en
dc.subject	Electromagnetic fields
dc.subject	Fracture
dc.subject	Piezoelectric materials
dc.subject	Rocks
dc.subject	Ηλεκτρομαγνητικά πεδία
dc.subject	Πετρώματα
dc.title	Understanding the fracture phenomena in inhomogeneous rock samples and ionic crystals, by monitoring the electromagnetic emission during their deformation	en
heal.type	journalArticle
heal.classification	Technology
heal.classification	Electrical engineering
heal.classification	Geology
heal.classification	Τεχνολογία
heal.classification	Ηλεκτρολογία Μηχανολογία
heal.classification	Γεωλογία
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh85133147
heal.classificationURI	http://zbw.eu/stw/descriptor/18426-4
heal.classificationURI	http://zbw.eu/stw/descriptor/15873-1
heal.classificationURI	N/A-Τεχνολογία
heal.classificationURI	N/A-Ηλεκτρολογία Μηχανολογία
heal.classificationURI	N/A-Γεωλογία
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh85102068
heal.contributorName	Ευταξίας, Κωνσταντίνος Α.	el
heal.identifier.secondary	DOI: 10.1016/j.pce.2003.11.011
heal.language	en
heal.access	campus
heal.publicationDate	2004
heal.bibliographicCitation	MAYROMATOU, C., HADJICONTIS, V., NINOS, D.K., MASTROGIANNIS, D., XADJIKONTIS, E., et al. (2004). Understanding the fracture phenomena in inhomogeneous rock samples and ionic crystals, by monitoring the electromagnetic emission during their deformation. Physics and Chemistry of the Earth. [online] 29 (4-9). p. 353-357. Available from: http://www.elsevier.com/	en
heal.abstract	The electromagnetic (EM) activity observed before earthquakes has received a lot of attention of the scientific community. Various aspects have been proposed in order to interpret these observed EM phenomena, and the most plausible interpretation is based on the microfracturing electrification. The scope of this paper is the laboratory investigation of this aspect by carrying out laboratory experiments for the detection of EM emission from rock samples and other crystalline materials under uniaxial compression. This paper reveals physical processes that occur in the compressed material, in the microscopic scale, resulting in the observed macroscopic EM phenomena. It was experimentally verified that (a) an abrupt microcracking event generates temporally varying EM field, not only in piezoelectric materials but in non-piezoelectric ionic crystals as well. This implies that the EM generation mechanism is not necessarily of piezoelectric origin. (b) In the presence of a large number of microfractures, each one of them essentially acts as an elementary emission source and thus the resulting spectrum is correlated to the spectral content of each individual pulse and (c) the microcracking process might display criticality.	en
heal.publisher	Elsevier	en
heal.journalName	Physics and Chemistry of the Earth	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true