Updating the classical Ekman-Nurse load stepping method by using a linear polarizer array camera for evaluating the stress field from isochromatic images

Juan Carlos Briñez de León; Alejandro Restrepo-M.

doi:10.1117/12.2594292

1 August 2021 Updating the classical Ekman-Nurse load stepping method by using a linear polarizer array camera for evaluating the stress field from isochromatic images

Juan Carlos Briñez de León, Alejandro Restrepo-M.

Author Affiliations +

Proceedings Volume 11841, Optics and Photonics for Information Processing XV; 118410P (2021) https://doi.org/10.1117/12.2594292
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

Digital photoelasticity allows to evaluate the stress field in loaded bodies. There, load stepping method by Ekman and Nurse allowed to avoid inconsistencies and ambiguities. However, it did not become popular by needing six images from two polariscope configurations a three load steeps. This paper updates the conventional method by introducing a polarizer array camera into a circular polariscope. Hence, polarizations of 0° and 90° from a Baumer VCXU50MP camera conduced to bright, and dark field images, simultaneously.With this work, the stress field can be evaluated by using a single optical configuration into the load stepping method.

Conference Presentation

Citation Download Citation

Juan Carlos Briñez de León and Alejandro Restrepo-M. "Updating the classical Ekman-Nurse load stepping method by using a linear polarizer array camera for evaluating the stress field from isochromatic images", Proc. SPIE 11841, Optics and Photonics for Information Processing XV, 118410P (1 August 2021); https://doi.org/10.1117/12.2594292

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