Quantitative Assessment of Fiber Fracture in Damaged Laminates Using X-Ray Radiography

    Volume 19, Issue 1 (January 1997)

    ISSN: 0884-6804

    CODEN: CTROAD

    Page Count: 10


    Highsmith, AL
    Assistant professor, The University of Alabama, Tuscaloosa, AL

    Keshav, S
    Programmer/analyst, American Express Travel Related Services Co., Phoenix, AZ

    Abstract

    In this paper, a new technique for extracting quantitative information about fiber fracture from dye penetrant enhanced X-ray radiographs is described. In this new inspection method, the observer marks fiber fracture zones on a digitized version of the radiograph depicting the damage state. Image processing routines are used to isolate the marked fiber fracture zones, and then extract fiber fracture parameters such as the length of the longest fiber fracture zone and the total length of fiber fracture from the marked image. The technique has been used to quantify fiber fracture in graphite epoxy laminates damaged by either quasi-static contact loading or low-velocity impact. The residual strengths of these specimens were found to correlate well with the fiber fracture parameters, with specimens containing more fiber fracture exhibiting lower residual strength.


    Paper ID: CTR10009J

    DOI: 10.1520/CTR10009J

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    Author
    Title Quantitative Assessment of Fiber Fracture in Damaged Laminates Using X-Ray Radiography
    Symposium , 0000-00-00
    Committee D30