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Experimental Study of Micro-Cracks in Composites under Mechanical Stress

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F04%3APU44714" target="_blank" >RIV/00216305:26220/04:PU44714 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Experimental Study of Micro-Cracks in Composites under Mechanical Stress

  • Original language description

    Mechanical stress of specimens results in generation of micro-cracks whose walls bear electric charges of opposite sign. The crack walls are executing damped oscillations thus giving rise to electric charge oscillations. The charge movement induces electric potentials in electrodes, which are applied to the specimen. These electric potentials are amplified to be subsequently processed in a PC. An acoustic emission signal, which is due to the crack generation, is measured at the same time. The acoustic aand electromagnetic signals are shifted in time against each other in consequence of the different wave propagation velocities. The time shift is also influenced by the acoustic sensor?s distance from the crack location. Our measurements were carried outin EXTREN composite, a building industry material. The measurement results are in a good agreement with the current theory of electromagnetic emission from mechanically stressed materials.

  • Czech name

    Experimentální studium mikrotrhlin v kompozitních materiálech při mechanickém zatěžování

  • Czech description

    Mechanické zatěžování vzorků způsobuje vznik mikrotrhlin, jejichž stěnách dochází ke generování elektrického náboje.

Classification

  • Type

    D - Article in proceedings

  • CEP classification

    BM - Solid-state physics and magnetism

  • OECD FORD branch

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2004

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Article name in the collection

    DEFEKTOSKOPIE 2004

  • ISBN

    80-214-2749-3

  • ISSN

  • e-ISSN

  • Number of pages

    8

  • Pages from-to

    81-88

  • Publisher name

    Czech Society for Nondestructive Testing

  • Place of publication

    Praha

  • Event location

    Spindleruv Mlyn

  • Event date

    Nov 3, 2004

  • Type of event by nationality

    WRD - Celosvětová akce

  • UT code for WoS article