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Proceedings Paper

Grating shearography
Author(s): Jacek Bulhak; Yves Surrel
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Paper Abstract

This paper describes grating shearography as a technique for direct measurement of in-plane strains and out-of-plane slopes. This technique has many interesting features for mechanical engineering: strains are measured without numerical differentiation, so a good spatial resolution can be obtained; it is also fairly insensitive to vibrations; full in-plane and out-of-plane information can be gathered simultaneously; finally, it is easy to switch from grating shearography to grating interferometry, in order to have also the displacement field. We present the theoretical basis of the method and the preliminary measurements on a graphite/epoxy composite sample under Iosipescu shear testing. Results are compared with FEM simulation.

Paper Details

Date Published: 13 August 1999
PDF: 10 pages
Proc. SPIE 3744, Interferometry '99: Techniques and Technologies, (13 August 1999); doi: 10.1117/12.357753
Show Author Affiliations
Jacek Bulhak, Ecole des Mines de Saint-Etienne (France)
Yves Surrel, National Institute of Metrology (France)

Published in SPIE Proceedings Vol. 3744:
Interferometry '99: Techniques and Technologies

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