Silva, M. L. and Ravichandran, G. (2011) Combined thermoelastic stress analysis and digital image correlation with a single infrared camera. Journal of Strain Analysis for Engineering Design, 46 (8). pp. 783-793. ISSN 0309-3247. https://resolver.caltech.edu/CaltechAUTHORS:20111202-122006740
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Abstract
A novel methodology simultaneously combining thermoelastic stress analysis (TSA) and digital image correlation (DIC) with a single infrared camera is presented. DIC is an optical method to determine deformation by image tracking with strains determined via differentiation. TSA is a non-contact measurement technique that provides the full-field stress directly using measured temperature changes. The combination of the two techniques improves the resolution and accuracy of TSA results by correcting for sample motion and distortion during loading. Illustrative examples, including an aluminium alloy plate with an edge crack and a nylon plate with a hole under tension, demonstrate the combined method which simultaneously measures stress and displacement.
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| Additional Information: | © 2011 The Authors. © 2011 Institution of Mechanical Engineers. Received April 30, 2011; Accepted July 7, 2011. Published online before print September 9, 2011. This work was supported by the US Department of Defense Multidisciplinary University Research Initiative programme at the California Institute of Technology on Mechanics and Mechanisms of Impulse Loading, Damage and Failure of Marine Structures and Materials through the Office of Naval J. Strain Analysis Vol. 46 Research (grant number N00014-06-1-0730) (Dr Y. D. S. Rajapakse, Program Manager). | |||||||||
| Group: | GALCIT | |||||||||
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| Subject Keywords: | thermoelastic stress analysis; digital image correlation; infrared; distortion correction | |||||||||
| Issue or Number: | 8 | |||||||||
| Record Number: | CaltechAUTHORS:20111202-122006740 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20111202-122006740 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 28283 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Jason Perez | |||||||||
| Deposited On: | 05 Dec 2011 21:12 | |||||||||
| Last Modified: | 09 Mar 2020 13:19 |
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