Identification of Damage in Composite Structures Using Thermoelastic Stress Analysis

Abstract:

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The application of a cyclic load on a composite material containing damage has the effect of heating due to the material viscoelasticity. This is exaggerated in the proximity of interlaminar failure because of friction between plies. Quantitatively studying a stressed component subject to these conditions using Thermoelastic Stress Analysis (TSA) has been inaccurate, as the localised heating has an effect on the thermoelastic response. Hence the thermoelastic signal from damaging composites will contain a stress-induced component and a temperature-induced component. In this paper a process is described that allows the thermoelastic signal to be de-coupled into a stress component and a temperature component. This is achieved using a combination of infra-red thermography and TSA. The process is based on the use of a special calibration device. The paper provides an experimental verification of the de-coupling using actual damaged composite components.

Info:

Periodical:

Key Engineering Materials (Volumes 293-294)

Edited by:

W.M. Ostachowicz, J.M. Dulieu-Barton, K.M. Holford, M. Krawczuk and A. Zak

Pages:

583-590

DOI:

10.4028/www.scientific.net/KEM.293-294.583

Citation:

T.R. Emery et al., "Identification of Damage in Composite Structures Using Thermoelastic Stress Analysis ", Key Engineering Materials, Vols. 293-294, pp. 583-590, 2005

Online since:

September 2005

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Price:

$35.00

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