Phase stepping: application to the automated determination of isostatics in photoelasticimetry

Yves Surrel

doi:10.1117/12.165441

10 December 1993 Phase stepping: application to the automated determination of isostatics in photoelasticimetry

Yves Surrel

Proceedings Volume 2003, Interferometry VI: Techniques and Analysis; (1993) https://doi.org/10.1117/12.165441
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

The application of phase-stepping to photoelasticimetry is presented. Photoelasticimetry is a widespread method for strain analysis. It provides information about the tensorial strain field of the structure or sample under test. An actual challenge is to complete the automation of photoelastic data processing. The phase-stepping method is easily adaptable to the isoclinic fringe pattern, as a simple rotation of the analyzer makes the isoclinic fringes move across the field of examination. The processing of phase-stepped isoclinic fringe patterns provides a whole-field map of the principal directions of the strain tensor. From this map, a very simple algorithm allows us to draw the isostatic lines. Different results concerning classical mechanical configurations are presented: tensile test of a specimen with a hole and diametrical compression of a ring. For the last example, a comparison is made with the analytical results.

Citation Download Citation

Yves Surrel "Phase stepping: application to the automated determination of isostatics in photoelasticimetry", Proc. SPIE 2003, Interferometry VI: Techniques and Analysis, (10 December 1993); https://doi.org/10.1117/12.165441

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