Abstract

A method for isochromatic determination in three-fringe photoelasticity is presented. It combines the phase-shifting method with cubic polynomial curve-fitting technology to eliminate the errors caused by color repetition. We perform a demonstration of the method on a circular disc subjected to compressive loading and an injection-molded cover with residual stresses. The test results compare well with the theoretical results.

© 2015 Chinese Laser Press

Isochromatic fringes in photoelasticity

Hillar Aben and Leo Ainola
J. Opt. Soc. Am. A 17(4) 750-755 (2000)

Phase measuring algorithm for extraction of isochromatics of photoelastic fringe patterns

J. A. Quiroga and A. González-Cano
Appl. Opt. 36(32) 8397-8402 (1997)

Robust approach to regularize an isochromatic fringe map

Philip Siegmann, Francisco Díaz-Garrido, and Eann A. Patterson
Appl. Opt. 48(22) E24-E34 (2009)

PhotoelastNet: a deep convolutional neural network for evaluating the stress field by using a single color photoelasticity image

Juan C. Briñez-de León, Mateo Rico-García, and Alejandro Restrepo-Martínez
Appl. Opt. 61(7) D50-D62 (2022)

Direct determination of isochromatic fringe order by use of two wavelengths

Chang-Hua Hu
Appl. Opt. 38(25) 5384-5387 (1999)