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Proceedings Paper

Continuous phase retrieval of isoclinic parameter in digital photoelasticity
Author(s): P. Pinit
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Paper Abstract

In this paper, an automated phase unwrapping algorithm for isoclinic parameter based on the phase stepping technique is presented. It provides whole-field maps of isoclinics for both σ1 and σ2 directions. The technique is based on processing four photoelastic fringe images of stressed photoelastic model acquired using a dark-field plane polariscope. The unwrapping process starts with the (largest) region selected on the basis of a threshold value and a map of isoclinics required. It works with two models (circular disk and ring under diametral compression), regardless of the presence of the isotropic points. The obtained results from the application reveal that the algorithm provides reliable experimental maps of σ1 and σ2 directions which are comparable to those maps obtained from simulated fringes.

Paper Details

Date Published: 24 August 2009
PDF: 6 pages
Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 737528 (24 August 2009); doi: 10.1117/12.839208
Show Author Affiliations
P. Pinit, King Mongkut’s Univ. of Technology Thonburi (Thailand)

Published in SPIE Proceedings Vol. 7375:
ICEM 2008: International Conference on Experimental Mechanics 2008
Xiaoyuan He; Huimin Xie; YiLan Kang, Editor(s)

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