The Refraction Indices and Brewster Law in Stressed Isotropic Materials and Cubic Crystals
Daniele Rinaldi,P. P. Natali,L. Montalto,Fabrizio Daví +3 more
- Vol. 11, Iss: 9, pp 1104
TLDR
In this paper, the authors studied the elasto-optic behavior of stressed cubic crystals and isotropic materials (e.g., glasses) and obtained the explicit dependence of the refraction indices on the stress (either applied or residual).Abstract:
We study the elasto-optic behavior of stressed cubic crystals (all classes) and isotropic materials (like e.g., glasses). We obtain the explicit dependence of the refraction indices on the stress (either applied or residual), as well as a mild generalization of the Brewster law for cubic crystals. We show also that the optic indicatrix and the stress ellipsoid are coaxial only in the isotropic case. This theory allows the improvement of the measurement techniques, as photoelasticity, on cubic crystals and optically isotropic materials.read more
Citations
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Journal ArticleDOI
Theoretical Basis for the Photoelastic Residual Stress Evaluation in Misaligned Cubic Crystals
TL;DR: In this paper , a set of equations that allow an estimate of the refraction indices as a function of the residual stress was proposed for cubic crystal specimens whose geometry is non-coherent with its crystallographic directions.
References
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Book
Digital Photoelasticity: Advanced Techniques and Applications
K. Ramesh,G Lewis +1 more
TL;DR: In this article, phase shifting, Polarization Stepping and Fourier Transform Methods are used for phase unwrapping and Optically Enhanced Tiling in digital photoelasticity.
Journal ArticleDOI
Review of RGB photoelasticity
TL;DR: The article presents an overview of the main characteristics of RGB photoelasticity that is influence of the quarter-wave plate error, number of acquisitions, type of light source, determination of low and high fringe orders, methods for searching the retardation, scanning procedures, calibration on a material different from that under test, combined use of the RGB and phase shifting methods.
Journal ArticleDOI
A photoelastic measurement system for residual stress analysis in scintillating crystals by conoscopic imaging
TL;DR: The proposed measurement system, based on the use of a photoelastic, conoscopic optical setup, is proposed for the assessment of stress state in scintillating crystals, showing sub-millimetric spatial resolution and stress uncertainty ≤0.25 MPa.
Journal ArticleDOI
Gradient scattered light method for non-destructive stress profile determination in chemically strengthened glass
TL;DR: In this paper, a non-destructive gradient scattered light method is presented for micron-scale stress profile measurement in chemically strengthened (chemically tempered, ion exchanged) glass, which is accomplished by passing a narrow laser beam through the surface layer of the glass at a considerably large incidence angle of 81.9°.
Journal ArticleDOI
Isochromate fringes simulation by Cassini-like curves for photoelastic analysis of birefringent crystals
TL;DR: In this article, a Cassini-like analytical equation of the isochromate fringes, depending on the refraction indexes, has been obtained by means of the classical electromagnetic theory.
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