An Array Measurement System for Thermoelastic Stress Analysis

    Published: Jan 1997

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    Thermoelastic Stress Analysis (TSA) is defined, and an overview is given to show its potentially wide applicability and brief history. A simplified calculation of instrumental response characteristics shows the substantial improvement in data acquisition speed that can be gained in a system using a staring array in comparison to that using a scanned detector. Descriptions are given of several methods which have been used to obtain data for thermoelastic stress analysis. Finally, image representations are presented of TSA data taken with a staring array imager showing the resolution attainable in practice using some laboratory fatigue samples and a prototype part.


    thermoelastic stress analysis, full-field stress analysis, stress imaging, staring infrared detector arrays

    Author Information:

    Welch, CS
    Sr. Research Scientist, College of William and Mary, Williamsburg, VA

    Cramer, KE
    Aerospace Technologist, NASA Langley Research Center, Hampton, VA

    Lesniak, JR
    Vice-President and President, Stress Photonics, Inc., Madison, WI

    Boyce, BR
    Vice-President and President, Stress Photonics, Inc., Madison, WI

    Committee/Subcommittee: E08.03

    DOI: 10.1520/STP11901S

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