Towards a hybrid infrared approach for damage assessment

Freuhmann, R.K., Dulieu-Barton, J.M. and Quinn, S. (2010) Towards a hybrid infrared approach for damage assessment. In, Dulieu-Barton, J.M. and Mines, R.A.W. (eds.) Advances in Experimental Mechanics VII. 7th BSSM International Conference on Advances in Experimental Mechanics Zurich, Switzerland, Trans Tech, 57-62. (Applied Mechanics and Materials, 24-25). (doi:10.4028/


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The thermoelastic response obtained from an infra-red (IR) detector contains two
components: the magnitude of the small stress induced temperature change caused by the
thermoelastic effect and the phase angle of the temperature change relative to a reference signal
generated by an application of a stress change. The phase angle is related to nonlinearity in the
thermoelastic response and departures from the simple linear relationship that underpins
thermoelastic stress analysis (TSA). The phase data could be used to make an assessment of
temperature evolutions caused by viscoelastic behaviour resulting from damage and provide a basis
for its evaluation. In the current paper the physics of other infra-red techniques used for nondestructive
evaluation is used to better understand the nature of the thermoelastic response. The
objective is to provide better exploitation of TSA by alternative processing of the IR measurements.
Three case studies are presented that demonstrate the potential of the alternative processing for
evaluating damage.

Item Type: Book Section
Digital Object Identifier (DOI): doi:10.4028/
ISBNs: 0878492488
ISSNs: 0309-3247
Related URLs:
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions : University Structure - Pre August 2011 > School of Engineering Sciences > Fluid-Structure Interactions
ePrint ID: 159413
Accepted Date and Publication Date:
2010In press
Date Deposited: 30 Jun 2010 07:38
Last Modified: 31 Mar 2016 13:27

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