Multilayer composite engineered materials are made of layered sequences where the reinforcement is surrounded and supported generally by an organic matrix These materials thanks to their mechanical properties found many structural applications in aerospace aeronautical transport civil engineering industries and infrastructural such as tanks storage pipelines In spite of their mechanical properties some defects may affect their durability in operating condition and then reduce their functionality Consequently the development of Non Destructive Testing (NDT) methods to ensure their health safety is the key to guarantee their growing use Conventional NDT methods used on metallic materials are often applicable on the composites materials especially the Acoustic Emission technique (AE) This method standardized in Europe since more than twenty years for the monitoring of metallic structures has been standardized since 2009 for the control of composite materials However the evaluation criteria of composite structures in operating conditions by AE remain generals Thus the sources of damage at the origin of the emissions are varied (matrix cracking fibers pull out fibers ruptures delamination ... ) contrary to metallic materials where one source often controls the damage mechanism crack for example In the first part of this review the principal damage mechanisms at the origin of acoustics emissions in metallic and composite materials will be presented In the second a summary of the state of the art dealing with the mam applications of the AE technique in particular the testing of metallic pressure equipment as well as the composite pressure tanks and capacities will be detailed Finally the relations between the damage mechanisms of the composite tanks and acoustic emission technique will be discussed


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    Title :

    L'Eemission acoustique: une demarche operationnelle prometteuse vers le contrôle en service des réservoirs composites de stockace de gaz sous haute pression


    Contributors:

    Published in:

    Publication date :

    2012


    Size :

    5 Seiten, 6 Bilder, 23 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    French






    Locomotive a haute pression

    Parmantier, M.A. | Engineering Index Backfile | 1932