About: A Model for an Electromagnetic signal Generated by Crack Creation in Solids

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	When a stress is applied to the solids (rocks or tiles) cracks creation can be detected by signals of an acoustic and electromagnetic emission. The experimental study has been performed on rock samples. Two metallic layers have covered the tested devices to create metal-insulator-metal structure. During the process of the crack generation the electric charges appeared at the faces of the cracks. The electric dipole system is a source of voltage induced on metal electrodes. Using Shockley-Ramo theorem, the differential equation for induced voltage is derived. We found that voltage on measuring capacitor is directly proportional to the dipole width and its active area. The recorded electric signal is superposition of crack walls “self” vibration given by crack length and vibration due to an ultrasonic wave given by sample dimensions. The electromagnetic signal precedes the acoustic emission response and time delay corresponds to the difference of propagation velocities of sound and electromagnetic r When a stress is applied to the solids (rocks or tiles) cracks creation can be detected by signals of an acoustic and electromagnetic emission. The experimental study has been performed on rock samples. Two metallic layers have covered the tested devices to create metal-insulator-metal structure. During the process of the crack generation the electric charges appeared at the faces of the cracks. The electric dipole system is a source of voltage induced on metal electrodes. Using Shockley-Ramo theorem, the differential equation for induced voltage is derived. We found that voltage on measuring capacitor is directly proportional to the dipole width and its active area. The recorded electric signal is superposition of crack walls “self” vibration given by crack length and vibration due to an ultrasonic wave given by sample dimensions. The electromagnetic signal precedes the acoustic emission response and time delay corresponds to the difference of propagation velocities of sound and electromagnetic r (en)
Title	A Model for an Electromagnetic signal Generated by Crack Creation in Solids A Model for an Electromagnetic signal Generated by Crack Creation in Solids (en)
skos:prefLabel	A Model for an Electromagnetic signal Generated by Crack Creation in Solids A Model for an Electromagnetic signal Generated by Crack Creation in Solids (en)
skos:notation	RIV/00216305:26220/03:PU39252!RIV11-MSM-26220___
http://linked.open...avai/riv/aktivita	P V Z
http://linked.open...avai/riv/aktivity	P(GA103/01/1058), P(GP102/02/D073), V, Z(MSM 261100007), Z(MSM 262200022)
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Koktavý, Pavel Koktavý, Bohumil
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoké učení technické v Brně / Fakulta elektrotechniky a komunikačních technologií
http://linked.open...dnocenehoVysledku	596945
http://linked.open...ai/riv/idVysledku	RIV/00216305:26220/03:PU39252
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Crack, Electric charge, Electromagnetic emission, Acoustic emission (en)
http://linked.open.../riv/klicoveSlovo	Electromagnetic emission Electric charge Acoustic emission Crack
http://linked.open...ontrolniKodProRIV	[48B6123232EF]
http://linked.open...v/mistoKonaniAkce	Brno
http://linked.open...i/riv/mistoVydani	Brno
http://linked.open...i/riv/nazevZdroje	Proceedings of the Workshop NDT CMC 2003 Non-Destructive Testing of Civil Materials and Constructions
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Electromagnetic and acoustic emission in solids Cracks detection in solids by means of electromagnetic emission
http://linked.open...UplatneniVysledku	2003
http://linked.open...iv/tvurceVysledku	Koktavý, Pavel Koktavý, Bohumil
http://linked.open...vavai/riv/typAkce	CST - Celostátní
http://linked.open.../riv/zahajeniAkce	2003-12-03 (xsd:date)
http://linked.open...n/vavai/riv/zamer	http://linked.opendata.cz/resource/domain/vavai/zamer/MSM%20261100007 http://linked.opendata.cz/resource/domain/vavai/zamer/MSM%20262200022
number of pages	6 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Vysoké učení technické v Brně
https://schema.org/isbn	80-7204-318-8
http://localhost/t...ganizacniJednotka	26220

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