An example system (100) for in-situ inspection of a composite structure (110) includes a surface-strain imaging apparatus (102, 400, 500, 600, 704, 804, 904a-c) and a controller (104). The surface-strain imaging apparatus is configured to image an area of an outer surface (310) of the composite structure while a temperature of the composite structure warms to thermal equilibrium with a surrounding environment and a temperature gradient exists within the composite structure. The controller includes a processor (112) and a memory (114) and is configured to detect, using data received from the surface-strain imaging apparatus, an out-of-plane displacement of the outer surface in the area caused by the temperature gradient. The controller is also configured to determine that the out-of-plane displacement satisfies a threshold condition and, based on determining that the out-of-plane displacement satisfies the threshold condition, flag the area of the outer surface for further inspection.


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    Title :

    COMPOSITE LAMINATE DAMAGE DETECTION METHOD USING AN IN-SITU THERMAL GRADIENT AND EXPANSION DIFFERENCES ACROSS THE DAMAGE


    Additional title:

    VERFAHREN ZUR ERKENNUNG VON SCHÄDEN AN VERBUNDLAMINATEN UNTER VERWENDUNG EINES IN-SITU-WÄRMEGRADIENTEN UND VON AUSDEHNUNGSUNTERSCHIEDEN ÜBER DEN SCHADEN HINWEG
    PROCÉDÉ DE DÉTECTION DES DOMMAGES CAUSÉS AUX STRATIFIÉS COMPOSITES EN UTILISANT UN GRADIENT THERMIQUE IN SITU ET LES DIFFÉRENCES DE DILATATION À TRAVERS LES DOMMAGES


    Contributors:

    Publication date :

    2023-06-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B64F GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT , Boden- oder Flugzeugträgerdeckeinrichtungen besonders ausgebildet für die Verwendung in Verbindung mit Luftfahrzeugen / G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen / G01N Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften , INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES



    COMPOSITE LAMINATE DAMAGE DETECTION METHOD USING IN-SITU THERMAL GRADIENT AND EXPANSION DIFFERENCES ACROSS DAMAGE

    SAMUEL R GOERTZ / GARY E GEORGESON | European Patent Office | 2021

    Free access



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