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Experimental Mechanics

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01-06-2009

Deformation and Rigid-Body-Motion Measurement by Multiple Interferometric Strain/Slope Rosettes

Part I: Theory

Authors: T. Tjhung, K. Li

Published in: Experimental Mechanics | Issue 3/2009

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Abstract

The multiple interferometric strain/slope rosette (Multi-ISSR) is a method extended from the interferometric strain/slope rosette (ISSR) to measure relative displacements of multiple strain gages and rigid-body-motion. The Multi-ISSR consists of more than three micro-indentations depressed onto a material surface. Upon laser beam illumination of the Multi-ISSR, light reflecting and diffracting from the Multi-ISSR indentations interfere to result in fringe patterns. The complicated patterns are analyzed to measure deformation and rigid-body-motion. Optical theory of the Multi-ISSR is developed and the governing equation for measuring deformation and rigid-body-motion is derived. Derivation of the general Multi-ISSR governing equation for the case of three indentations is presented and compared with the governing equation of the published ISSR.

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Title: Deformation and Rigid-Body-Motion Measurement by Multiple Interferometric Strain/Slope Rosettes
Part I: Theory
Authors: T. Tjhung
K. Li
Publication date: 01-06-2009
Publisher: Springer US
Published in: Experimental Mechanics / Issue 3/2009
Print ISSN: 0014-4851
Electronic ISSN: 1741-2765
DOI: https://doi.org/10.1007/s11340-008-9168-7

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