Phase unwrapping method for three-dimensional stress analysis by scattered-light photoelasticity with unpolarized light. 2. Experiment

Journal Article · Sat Sep 01 00:00:00 EDT 2007 · Applied Optics

DOI:https://doi.org/10.1364/AO.46.006469· OSTI ID:21013611

Kihara, Toshiki

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.

• OSTI ID: 21013611
• Journal Information: Applied Optics, Vol. 46, Issue 25; Other Information: DOI: 10.1364/AO.46.006469; (c) 2007 Optical Society of America; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6935
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IMAGE PROCESSING
NONDESTRUCTIVE TESTING
PHOTOELASTICITY
SPHERICAL CONFIGURATION
STRESS ANALYSIS
STRESSES
THREE-DIMENSIONAL CALCULATIONS
VISIBLE RADIATION
WAVELENGTHS