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DOI | 10.4028/WWW.SCIENTIFIC.NET/AMM.13-14.29 | ||||
Año | 2008 | ||||
Tipo | proceedings paper |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
Optical Full Field Techniques (OFFT) are more and more utilized by mechanical laboratories. Among these methods, interferometry techniques (mainly composed of Speckle/Grating Interferometry or Speckle/Grating Shearography) are more difficult to use in a mechanical lab context, because of their sensitivity to external vibrations (except shearography), and because of the global lack of optical culture of mechanical engineers. Speckle-based methods are of great practical interest for the users, but their signal to noise ratio (SNR) is affected by the rigid body motion of the specimen. Here, the speckle decorrelation is minimized at local scale directly using the SNR. First, a shearography experiment is modeled to characterize the recorrelation procedure for a rigid body motion, a constant strain map and finally a high degree of localization. The mean noise level is found to be 6 times higher than a fully-correlated phase map for a 1 pixel speckle size. Last, a first application to a single-ply fabric composite lamina is shown. Resulting strain maps are of high quality with a very low spatial resolution (4 pixels). The local bending / global tension coupling effect is clearly put in evidence.
Ord. | Autor | Género | Institución - País |
---|---|---|---|
1 | Molimard, Jerome | Hombre |
Ecole Natl Super Mines - Francia
École des Mines de Saint-Étienne - Francia |
2 | Cordero, R. R. | Hombre |
Universidad de Santiago de Chile - Chile
Universidad Técnica Federico Santa María - Chile |
3 | Vautrin, Alain | Hombre |
Ecole Natl Super Mines - Francia
Universidad Técnica Federico Santa María - Chile |
4 | DulieuBarton, JM | - | |
5 | Lord, JD | - | |
6 | Greene, RJ | - |