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Optical Engineering

Completely automated determination of two-dimensional photoelastic parameters using load stepping
Author(s): Matthew J. Ekman; Andrew D. Nurse
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Paper Abstract

The new approach to phase-stepping photoelasticity known as ‘‘load stepping’’ is used to determine automatically the isochromatic parameter a and the isoclinic angle ?. There is no need for the user to calibrate the results other than to convert the isochromatic parameter into a principal stress difference using the material fringe constant. Four phase-stepped images are collected using a circular polariscope for each of three load steps, which differ by small equal increments. A ramped phase map for the isochromatic parameter is produced in the range -?

Paper Details

Date Published: 1 June 1998
PDF: 7 pages
Opt. Eng. 37(6) doi: 10.1117/1.601694
Published in: Optical Engineering Volume 37, Issue 6
Show Author Affiliations
Matthew J. Ekman, Loughborough University (United Kingdom)
Andrew D. Nurse, Loughborough Univ. of Technology (United Kingdom)

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