BLUNT IMPACT INDICATOR METHODS Systems and methods using fluid-filled hollow microspheres (6) to assist in monitoring or indicating high-energy blunt impacts on structures such as aircraft. A multiplicity of microspheres (6) may be adhered to or embedded in a coating applied on a surface of a substrate (2) (e.g., a tape or an applique), which substrate (2) in turn can be adhered to a surface of a structure to be monitored. The microspheres (6) are designed to rupture at one or more specified pressure thresholds. In some embodiments, the microspheres (6) are filled with electrically conductive fluid (20) which, if released from ruptured microsphere (6), changes the electromagnetic state of the substrate (2). In response to the detection of a sufficiently large change in the electromagnetic state of the substrate (2), a blunt impact indication is generated. The impact site may then undergo non-destructive inspection. 2 1o00 a2b ,NII 41ON a*0a e 0% e 8\ /20 / 6 2a04 10 2b


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    Title :

    Blunt impact indicator methods


    Contributors:

    Publication date :

    2020-04-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G01P MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION OR SHOCK , Messen der Linear- oder Winkelgeschwindigkeit, der Beschleunigung, der Verzögerung oder des Stoßes / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT



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