Holography

Investigation of fracture mechanisms in resin concrete using spatially multiplexed digital Fresnel holograms

[+] Author Affiliations
Pascal Picart

E´cole Nationale Supe´rieure d’Inge´nieurs du Mans, rue Aristote, 72085?LE?MANS Cedex 9, France

Universite´ du Maine, Laboratoire d’Acoustique de l’Universite´ du Maine, UMR CNRS 6613, Avenue Olivier Messiaen, 72085?LE?MANS Cedex 9, France E-mail: pascal.picart@univ-lemans.fr

Boubakar Diouf

Universite´ du Maine, Groupe Composites et Structures Me´caniques, Avenue Olivier Messiaen, 72085?LE?MANS Cedex 9, France

Eric Lolive

Laboratoire Universitaire des Syste`mes Industriels et Ge´ophysiques, rue de Kergoat, B.P. 45, 29284?BREST Cedex, France

Jean-Marie Berthelot

Universite´ du Maine, Groupe Composites et Structures Me´caniques, Avenue Olivier Messiaen, 72085?LE?MANS Cedex 9, France

Opt. Eng. 43(5), 1169-1176 (May 01, 2004). doi:10.1117/1.1668282
History: Received Sep. 12, 2003; Revised Oct. 31, 2003; Accepted Nov. 3, 2003; Online April 19, 2004
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A digital twin Mach-Zehnder holographic interferometer is presented and applied to the investigation of fracture mechanisms in resin concrete submitted to a three-point flexural loading. The double interferometric setup allows spatial multiplexing for a simultaneous double sensitivity measurement. The component determination is obtained from two different illumination directions giving two sensitivity vectors. The numerical reconstruction of the object is performed following the discrete Fresnel transform. We investigate the image formation by merging analogic and discrete Fourier calculations in a smooth reference plane wave scheme. We examine the complex relation between the original object and the reconstructed one and the object localization is derived. Experimental results are presented and exploited to obtain the evolution of the crack tip propagation during the test. © 2004 American Institute of Physics.

© 2004 American Institute of Physics

Citation

Pascal Picart ; Boubakar Diouf ; Eric Lolive and Jean-Marie Berthelot
"Investigation of fracture mechanisms in resin concrete using spatially multiplexed digital Fresnel holograms", Opt. Eng. 43(5), 1169-1176 (May 01, 2004). ; http://dx.doi.org/10.1117/1.1668282


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