Advances in Speckle Metrology and Related Techniques by Guillermo H. Kaufmann

By Guillermo H. Kaufmann

Speckle metrology comprises numerous optical thoughts which are according to the speckle fields generated via mirrored image from a coarse floor or through transmission via a coarse diffuser. those options have confirmed to be very beneficial in trying out varied fabrics in a non-destructive approach. they've got replaced dramatically over the past years because of the improvement of recent optical parts, with quicker and extra robust electronic desktops, and novel information processing ways.
This latest assessment of the subject describes new strategies constructed within the box of speckle metrology during the last decade, in addition to functions to experimental mechanics, fabric technology, optical checking out, and fringe research.

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By repeating the measurement before and after the sample deformation, a phase difference map can then be computed that is proportional to the out-of-plane displacement component for the slice within the coherence gate. By varying the position of the translation stage, the coherence gate can be placed at different locations within the sample, thereby allowing the full 3D out-of-plane displacement field to be evaluated. Examples of applications of LCSI include the measurement of hygral deformations of subsurface paint layers on ancient terracotta soldiers [20] and displacement fields around adhesively bonded joints in multilayer structures [21].

And Wenzen, Z. (1998) Fast phase-unwrapping algorithm based on a gray-scale mask and flood fill. Appl. , 37, 5416–5420. 35 Makino, A. and Nelson, D. (1994) Residual-stress determination by singleaxis holographic interferometry and hole drilling. Part I: theory. Exp. , 34, 66–78. stresses by measuring the deformations around drilled holes. Trans. ASME, 56, 249–254. 37 Albertazzi Gon¸calves, A. , and Devece, E. (1998) Measurement of thermal deformation of an engine piston using a conical mirror and ESPI.

S. Vikram), American Scientific Publishers, California, USA. Lu, J. (1996) Handbook of Measurement of Residual Stresses, The Fairmont Press, Lilburn, GA. 23 Lu, J. (2005) Handbook on Residual Stress, Society of Experimental Mechanics. J. and Vigness, I. (1966) 25 26 27 28 29 30 31 32 Hole-drilling strain-gage method of measuring residual stresses. Exp. , 6, 577–586. ASTM E837-08e1 (2008) Standard Test Method for Determining Residual Stresses by the Hole-Drilling Strain-Gage Method, Annual Book of ASTM Standards, American Society for Testing and Materials.

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