Grating shearography

Jacek Bulhak; Yves Surrel

doi:10.1117/12.357753

13 August 1999 Grating shearography

Jacek Bulhak, Yves Surrel

Proceedings Volume 3744, Interferometry '99: Techniques and Technologies; (1999) https://doi.org/10.1117/12.357753
Event: International Conference on Optical Metrology, 1999, Pultusk Castle, Poland

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.

Citation Download Citation

Jacek Bulhak and Yves Surrel "Grating shearography", Proc. SPIE 3744, Interferometry '99: Techniques and Technologies, (13 August 1999); https://doi.org/10.1117/12.357753

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