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13 September 2012 Digital holographic interferometry applied to mixed-mode fracture analysis
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In the present work digital holographic interferograms obtained by digital Fourier transform holography are used to analyze fracture propagation. Digital holography is a non-contact optical technique that consists in recording digitally a hologram with a CCD sensor as holographic media. The image reconstruction of the object is obtained numerically. Holographic interferograms are obtained by superposition of two holograms of object, being the first one in its initial state and the second one after some modification produced in this object. Basically, the main purpose is to use interferograms for investigating mixed-mode I/II fracture. Tests on cracked specimen under combined loading are performed.
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F. S. de Oliveira, G. N. de Oliveira, L. C. S. Nunes, and P. A. M. dos Santos "Digital holographic interferometry applied to mixed-mode fracture analysis", Proc. SPIE 8493, Interferometry XVI: Techniques and Analysis, 84931C (13 September 2012);

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