Predicting fracture of mortar beams under three-point bending using non-extensive statistical modeling of electric emissions

dc.contributor.author	Στεργιόπουλος, Χαράλαμπος Χ.	el
dc.contributor.author	Σταύρακας, Ηλίας	el
dc.contributor.author	Τριάντης, Δήμος Α.	el
dc.contributor.author	Βαλλιανάτος, Φίλιππος	el
dc.contributor.author	Stonham, John T.	en
dc.date.accessioned	2015-05-15T10:31:12Z
dc.date.available	2015-05-15T10:31:12Z
dc.date.issued	2015-05-15
dc.identifier.uri	http://hdl.handle.net/11400/10441
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	Cement based materials
dc.subject	Electric current emissions
dc.subject	Failure diagnostics
dc.subject	Nondestructive testing
dc.subject	Non-extensive statistical modeling
dc.subject	Tsallis entropy
dc.subject	Τσιμεντοειδή υλικά
dc.subject	Εκπομπές ηλεκτρικού ρεύματος
dc.subject	Αποτυχία διάγνωσης
dc.subject	Μη καταστροφικές δοκιμές
dc.subject	Μη εκτεταμένη στατιστική μοντελοποίηση
dc.title	Predicting fracture of mortar beams under three-point bending using non-extensive statistical modeling of electric emissions	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://id.loc.gov/authorities/subjects/sh85092221
heal.identifier.secondary	DOI: 10.1016/j.physa.2014.10.060
heal.language	en
heal.access	campus
heal.publicationDate	2015-02-01
heal.bibliographicCitation	STERGIOPOULOS, C.C., STAVRAKAS, I., TRIANTIS, D.A., VALLIANATOS, F. & STONHAM, J.T. (2015). Predicting fracture of mortar beams under three-point bending using non-extensive statistical modeling of electric emissions. Physica A: Statistical Mechanics and its Applications. [Online] 419. p.603-611. Available from: http://www.elsevier.com/[Accessed 22/10/2014]	en
heal.abstract	Weak electric signals termed as "Pressure Stimulated Currents, PSC" are generated and detected while cement based materials are found under mechanical load, related to the creation of cracks and the consequent evolution of cracks' network in the bulk of the specimen. During the experiment a set of cement mortar beams of rectangular cross-section were subjected to Three-Point Bending (3PB). For each one of the specimens an abrupt mechanical load step was applied, increased from the low load level (Lo) to a high final value (Lh), where Lh was different for each specimen and it was maintained constant for long time. The temporal behavior of the recorded PSC show that during the load increase a spike-like PSC emission was recorded and consequently a relaxation of the PSC, after reaching its final value, follows. The relaxation process of the PSC was studied using non-extensive statistical physics (NESP) based on Tsallis entropy equation. The behavior of the Tsallis q parameter was studied in relaxation PSCs in order to investigate its potential use as an index for monitoring the crack evolution process with a potential use in non-destructive laboratory testing of cement-based specimens of unknown internal damage level. The dependence of the q-parameter on the Lh (when Lh < 0.8Lf), where Lf represents the 3PB strength of the specimen, shows an increase on the q value when the specimens are subjected to gradually higher bending loadings and reaches a maximum value close to 1.4 when the applied Lh becomes higher than 0.8Lf. While the applied Lh becomes higher than 0.9Lf the value of the q-parameter gradually decreases. This analysis of the experimental data manifests that the value of the entropic index q obtains a characteristic decrease while reaching the ultimate strength of the specimen, and thus could be used as a forerunner of the expected failure.	en
heal.publisher	Elsevier	en
heal.journalName	Physica A: Statistical Mechanics and its Applications	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true