Is pressure stimulated current relaxation in amphibolite a case of non-extensivity?

dc.contributor.author	Βαλλιανάτος, Φίλιππος	el
dc.contributor.author	Τριάντης, Δήμος Α.	el
dc.date.accessioned	2015-05-16T10:05:26Z
dc.date.available	2015-05-16T10:05:26Z
dc.date.issued	2015-05-16
dc.identifier.uri	http://hdl.handle.net/11400/10502
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://iopscience.iop.org/	en
dc.subject	Uniaxial stress
dc.subject	Electric signal
dc.subject	Pressure stimulated current
dc.subject	Microfracture
dc.subject	Μονοαξονική πίεση
dc.subject	Ηλεκτρικό σήμα
dc.subject	Ρεύμα που ενεργοποιείται με την πίεση
dc.subject	Μικροκάταγμα
dc.title	Is pressure stimulated current relaxation in amphibolite a case of non-extensivity?	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.identifier.secondary	DOI: 10.1209/0295-5075/99/18006
heal.language	en
heal.access	campus
heal.publicationDate	2012-07
heal.bibliographicCitation	VALLIANATOS, F. & TRIANTIS, D.A. (2012). Is pressure stimulated current relaxation in amphibolite a case of non-extensivity?. EPL. [Online] 99 (1). 18006. Available from: http://iopscience.iop.org/	en
heal.abstract	The application of uniaxial stress on rocks is accompanied by the production of an electric signal which is described by the term pressure stimulated current (PSC). In this work the high rate step stress (HRSS) technique is applied, and the PSC relaxation in amphibolite samples from KTB drilling, is studied in the frame of non-extensive statistical mechanics. After the application of an abrupt stress step, a PSC spike is recorded up to its maximum value PSC max, decreasing gradually, right after the stress stabilization in a value σ H. In the present work we study PSCs relaxation in uniaxial compressed rocks using a generalized exponential function called q-exponential, which explicitly introduces hierarchically constrained dynamics and interactions. The interactions are associated with the non-extensive entropy parameter q which exhibits a behavior indicating a dependence with the applied uniaxial stress as we approach fracture. The stress-dependent q-estimation leads to the conclusion that fracturing is a subextensive process with hierarchically constrained dynamics. Furthermore, assuming an assembly of relaxed subdomains created due to microfracture, a non-extensive behavior of the observed macroscopically PSC relaxation is discussed in the frame of a superstatistical approach.	en
heal.publisher	European Physical Society	en
heal.publisher	EDP Sciences	en
heal.publisher	Società Italiana di Fisica	it
heal.publisher	IOP Publishing	en
heal.publisher	EPL Association	en
heal.journalName	EPL	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true