SYMPOSIA PAPER Published: 01 January 1997

An Array Measurement System for Thermoelastic Stress Analysis


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.

Author Information

Welch, CS
College of William and Mary, Williamsburg, VA
Cramer, KE
NASA Langley Research Center, Hampton, VA
Lesniak, JR
Stress Photonics, Inc., Madison, WI
Boyce, BR
Stress Photonics, Inc., Madison, WI
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Developed by Committee: E08
Pages: 198–207
DOI: 10.1520/STP11901S
ISBN-EB: 978-0-8031-5371-4
ISBN-13: 978-0-8031-2403-5