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Abstract
A phase unwrapping method that employs scattered-light photoelasticity with unpolarized light was proposed for automated three-dimensional stress analysis [Appl. Opt. 45, 8848 (2006)]. I now demonstrate the validity of this method by performing nondestructive measurements at three different wavelengths of the secondary principal stress direction psi(j) and the total relative phase retardation rho(jtot) in the plane that contains the rotated principal stress directions in a spherical frozen stress model and compare the results obtained with mechanically sliced models. The parameters psi(j) and rho(jtot) were measured nondestructively over the entire field of view for the first time, to the best of my knowledge.
Published Version
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