Reference : Out-of-plane displacement derivative measurement: comparison of results obtained by a...
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Civil engineering
http://hdl.handle.net/2268/23551
Out-of-plane displacement derivative measurement: comparison of results obtained by a shearographic interferometer using the separation of the polarization states and the finite element method
English
Rosso, Vanessa [> >]
Zhang, Lihong mailto [Université de Liège - ULg > Département ArGEnCo > Département ArGEnCo >]
Michel, Fabrice mailto [Université de Liège - ULg > > > Doct. sc. (physique - Bologne)]
Renotte, Yvon mailto [Université de Liège - ULg > Département de physique > Département de physique >]
Lion, Yves [Université de Liège - ULg > > Physique générale (caract. opt. et magnétique des matériaux) >]
Habraken, Anne mailto [Université de Liège - ULg > Département ArGEnCo > Département ArGEnCo >]
2006
Proceedings of Photonics North Conference 2006
Mathieu, P.
Yes
International
0-8194-6429-5
Photonics North 2006
du 5 au 8 juin 2006
Québec City
Canada
[en] shearography ; speckle interferometry ; finite element method
[fr] phase-shifting ; liquid crystal retarder
[en] LIMARC
[en] An original experimental setup for shearography with metrological applications is presented herein. The simplicity and the efficiency of the setup are provided by a shearing device, a prism that separates the TE and TM polarization modes with a coating and a thin glass plate attached on its face. The temporal phase shifting method is applied through the use of a liquid crystal variable retarder. The use of this shearing device enables an in-line and almost-common path configuration for the shearing interferometer, a path that leads to high stability of the interferometer and a low sensitivity to external disturbances. In order to prove the efficiency and the accuracy of this speckle shearing interferometer, the out-of-plane displacement derivative relative to the shearing interferometry direction of a centrally loaded steel plate has been measured by the shearographic interferometer and then compared with the out-of-plane displacement derivative computed from the displacement field provided by the finite element method. The results are in good agreement.
http://hdl.handle.net/2268/23551

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