Principles of Infrared Measurements and Review of Instrumentation Techniques for Thermoelastic Stress Analysis

J. M.B. Webber

doi:10.1117/12.937882

1 April 1987 Principles of Infrared Measurements and Review of Instrumentation Techniques for Thermoelastic Stress Analysis

J. M.B. Webber

Author Affiliations +

Proceedings Volume 0731, Stress Analysis by Thermoelastic Techniques; (1987) https://doi.org/10.1117/12.937882
Event: Stress Analysis by Thermoelastic Techniques, 1987, London, United Kingdom

Abstract

This paper provides a state-of-the-art review of the techniques in the recent development in infrared measurement technology for experimental stress analysis. These techniques are based on the use of radiometric systems to determine by non-contact means the thermoelastic effect in structures and materials subjected to dynamic loading. The recent advent of highly sensitive infrared systems, some of which are capable of measuring dynamic temperature changes as small as 1 mK, has led to versatile instrumentation for the evaluation of stresses in engineering models and actual components. The most important feature of the techniques is that it provides a unique method of direct measurement of stress in a material of a test component by non-contact means. Methods have recently been developed to determine dynamic stresses over a frequency of less than 1 Hz up to many KHz. It is now recognised that the technique has become a new important tool for stress analysis and already considerable experience has been gained in practical application.

Citation Download Citation

J. M.B. Webber "Principles of Infrared Measurements and Review of Instrumentation Techniques for Thermoelastic Stress Analysis", Proc. SPIE 0731, Stress Analysis by Thermoelastic Techniques, (1 April 1987); https://doi.org/10.1117/12.937882

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