Digital image analysis around isotropic points for photoelastic pattern recognition

Surendra, Kamadi Vara Naga and Simha, Yogendra KR (2015) Digital image analysis around isotropic points for photoelastic pattern recognition. In: OPTICAL ENGINEERING, 54 (8).

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Abstract

Fringe tracking and fringe order assignment have become the central topics of current research in digital photoelasticity. Isotropic points (IPs) appearing in low fringe order zones are often either overlooked or entirely missed in conventional as well as digital photoelasticity. We aim to highlight image processing for characterizing IPs in an isochromatic fringe field. By resorting to a global analytical solution of a circular disk, sensitivity of IPs to small changes in far-field loading on the disk is highlighted. A local theory supplements the global closed-form solutions of three-, four-, and six-point loading configurations of circular disk. The local theoretical concepts developed in this paper are demonstrated through digital image analysis of isochromatics in circular disks subjected to three-and four-point loads. (C) 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)

Item Type:	Journal Article
Publication:	OPTICAL ENGINEERING
Publisher:	SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
Additional Information:	Copy right for this article belongs to the SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS, 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
Keywords:	photoelasticity; isochromatics; isotropic point; digital image analysis; pixel intensity
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	05 Nov 2015 07:28
Last Modified:	05 Nov 2015 07:28
URI:	http://eprints.iisc.ac.in/id/eprint/52693

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