Completely automated determination of two-dimensional photoelastic parameters using load stepping

Matthew J. Ekman; Andrew D. Nurse

doi:10.1117/1.601694

1 June 1998 Completely automated determination of two-dimensional photoelastic parameters using load stepping

Matthew J. Ekman, Andrew D. Nurse

Optical Engineering, Vol. 37, Issue 6, (June 1998). https://doi.org/10.1117/1.601694

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 -?

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Matthew J. Ekman and Andrew D. Nurse "Completely automated determination of two-dimensional photoelastic parameters using load stepping," Optical Engineering 37(6), (1 June 1998). https://doi.org/10.1117/1.601694

Published: 1 June 1998

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