Photoelastic evaluation of the temporal thermal stress of a bi-material subjected to magnetic induction heating processes

Alejandro Restrepo-Martínez; Laura Alvarez-Gil

doi:10.1117/12.2594272

1 August 2021 Photoelastic evaluation of the temporal thermal stress of a bi-material subjected to magnetic induction heating processes

Alejandro Restrepo-Martínez, Laura Alvarez-Gil

Author Affiliations +

Proceedings Volume 11841, Optics and Photonics for Information Processing XV; 118410B (2021) https://doi.org/10.1117/12.2594272
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

This paper used digital photoelasticity to evaluate the temporal variations of the stress field in an epoxy-metal embedded actuator. Stress variations were generated with magnetic induction heating-cooling cycles and they were analyzed with frames of a color digital video acquired with a circular polariscope. A phase wavelength stepping algorithm and an unwrapped standard algorithm were applied to obtained unwrapped map. The modification of the fields of bi-material stresses opens the opportunity to generate photoelastic actuators, in consequence they can be used as phase modulators. In consequence, digital photoelasticity is an excellent technique to characterize this effect in bimaterials.

Conference Presentation

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Alejandro Restrepo-Martínez and Laura Alvarez-Gil "Photoelastic evaluation of the temporal thermal stress of a bi-material subjected to magnetic induction heating processes", Proc. SPIE 11841, Optics and Photonics for Information Processing XV, 118410B (1 August 2021); https://doi.org/10.1117/12.2594272

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