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Proceedings Paper

Evaluation of residual stress in concrete structures by digital shearography
Author(s): Y.Y. Hung; Kahwah Long
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Paper Abstract

This paper presents a method for evaluating residual stresses. The approach is based on measuring the deformation due to the relief of stresses produced by a hole drilling technique. The deformation is measured by digital shearography al. In addition, the technique is extended to evaluating stresses in concrete structures. In this application, the stresses in concrete are treated as residual stresses. Since concrete materials are weak in tensile strength, one method of assessing the integrity of concrete structures is to look for the presence of tensile stresses in concrete. Unlike holography and ESPI, digital shearography does not require special vibration nor ambient light independence. These features make the method practical for detection of residual stresses in a production/field environment.

Paper Details

Date Published: 1 March 1994
PDF: 7 pages
Proc. SPIE 2004, Interferometry VI: Applications, (1 March 1994); doi: 10.1117/12.172602
Show Author Affiliations
Y.Y. Hung, Oakland Univ. (United States)
Kahwah Long, Oakland Univ. (United States)

Published in SPIE Proceedings Vol. 2004:
Interferometry VI: Applications
Ryszard J. Pryputniewicz; Gordon M. Brown; Werner P. O. Jueptner, Editor(s)

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