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rdf:type
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Description
| - Generation of crack is accompanied by generation of electric charges on the crack walls. This charge can be measured by a capacitance antenna. When a micro-crack is generated in a solid the faces of the crack make up plates of an elementary capacitor and the charges located on them constitute an electric dipole or quadrupole. The magnitude of the electric charge configuration depends on the time. Experimentally we have observed two different type of signals like damped harmonic motion with: (i) exponentially time dependent transient value and (ii) constant average value. we suppose that first one is generated by dipole structure and second one is generated by quadrupole. Using Shockley-Ramo theorem, the differential equation for induced voltage is derived. We found that voltage on measuring capacitor is directly proportional to the electric charge distribution. The recorded electric signal is superposition of crack walls %22self%22 vibration given by crack length and vibration due to an ultrasonic wave gi
- Generation of crack is accompanied by generation of electric charges on the crack walls. This charge can be measured by a capacitance antenna. When a micro-crack is generated in a solid the faces of the crack make up plates of an elementary capacitor and the charges located on them constitute an electric dipole or quadrupole. The magnitude of the electric charge configuration depends on the time. Experimentally we have observed two different type of signals like damped harmonic motion with: (i) exponentially time dependent transient value and (ii) constant average value. we suppose that first one is generated by dipole structure and second one is generated by quadrupole. Using Shockley-Ramo theorem, the differential equation for induced voltage is derived. We found that voltage on measuring capacitor is directly proportional to the electric charge distribution. The recorded electric signal is superposition of crack walls %22self%22 vibration given by crack length and vibration due to an ultrasonic wave gi (en)
- Generace trhlin je doprovázena vznikem elektrického náboje na stěnách trhliny. Tento náboj je možné měřit kapacitním snímačem. Uvedeného jevu je možné využít ke studiu vzniku trhlin. (cs)
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Title
| - AE sources characterization by electromagnetic and acoustic emission
- Charakterizace zdrojů akustické emise pomocí elektromagnetické a akustické emise (cs)
- AE sources characterization by electromagnetic and acoustic emission (en)
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skos:prefLabel
| - AE sources characterization by electromagnetic and acoustic emission
- Charakterizace zdrojů akustické emise pomocí elektromagnetické a akustické emise (cs)
- AE sources characterization by electromagnetic and acoustic emission (en)
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skos:notation
| - RIV/00216305:26220/07:PU70334!RIV08-GA0-26220___
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http://linked.open.../vavai/riv/strany
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http://linked.open...avai/riv/aktivita
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http://linked.open...avai/riv/aktivity
| - P(GA103/06/0708), Z(MSM0021630503)
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http://linked.open...vai/riv/dodaniDat
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http://linked.open...aciTvurceVysledku
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http://linked.open.../riv/druhVysledku
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http://linked.open...iv/duvernostUdaju
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http://linked.open...titaPredkladatele
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http://linked.open...dnocenehoVysledku
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http://linked.open...ai/riv/idVysledku
| - RIV/00216305:26220/07:PU70334
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http://linked.open...riv/jazykVysledku
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http://linked.open.../riv/klicovaSlova
| - non-destructive testing, ultrasonic methods, non-linear ultrasonic spectroscopy, acoustic emission, electromagnetic emission, crack, granite (en)
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http://linked.open.../riv/klicoveSlovo
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http://linked.open...ontrolniKodProRIV
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http://linked.open...v/mistoKonaniAkce
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http://linked.open...i/riv/mistoVydani
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http://linked.open...i/riv/nazevZdroje
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http://linked.open...in/vavai/riv/obor
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http://linked.open...ichTvurcuVysledku
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http://linked.open...cetTvurcuVysledku
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http://linked.open...vavai/riv/projekt
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http://linked.open...UplatneniVysledku
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http://linked.open...iv/tvurceVysledku
| - Koktavý, Pavel
- Šikula, Josef
- Lokajíček, Tomáš
- Koktavý, Bohumil
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http://linked.open...vavai/riv/typAkce
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http://linked.open.../riv/zahajeniAkce
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http://linked.open...n/vavai/riv/zamer
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number of pages
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http://purl.org/ne...btex#hasPublisher
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https://schema.org/isbn
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http://localhost/t...ganizacniJednotka
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