Full-Field Unwrapping of Isochromatic Fringe Orders from Photoelastic Fringes Obtained Using Plane Polariscope

Abstract

A new method for accurately determining the absolute fringe orders of isochromatics from color photoelastic fringes obtained using a plane polariscope was developed. This method uses a set of five color photoelastic images, which are obtained at five sets of angular positions of the polarization plate in dark- and light-field polariscopes. The effectiveness of the method was investigated with the simulated color photoelastic fringes of a circular disk subjected to a concentrated load. Results showed that the method is effective for determining the absolute fringe orders.