Method for determining stress-optical constants of optically isotropic and anisotropic materials

A method for optically determining the stress-optical constants of optically isotropic and anisotropic materials. A collimated beam of monochromatic light is directed at the tip of a crack in a thin plate specimen under plane-stress from a direction substantially perpendicular to the surface of the specimen and to the direction of the stress. Reflected and transmitted stress-optical constants are determined from a ratio of the diameters of transmitted and reflected caustics from the specimen and the known Poisson's ratio and modulus of elasticity for the specimen.
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Abstract/Description: A method for optically determining the stress-optical constants of optically isotropic and anisotropic materials. A collimated beam of monochromatic light is directed at the tip of a crack in a thin plate specimen under plane-stress from a direction substantially perpendicular to the surface of the specimen and to the direction of the stress. Reflected and transmitted stress-optical constants are determined from a ratio of the diameters of transmitted and reflected caustics from the specimen and the known Poisson's ratio and modulus of elasticity for the specimen.
Subject(s): 73/800
356/32
Date Issued: 1978-10-10
Title: Method for determining stress-optical constants of optically isotropic and anisotropic materials.
Name(s): The University of Toledo, assignee
Raftopoulos, Demetrios D., inventor
Kartalopoulos, Stamatios V., inventor
Type of Resource: text
Genre: patent
Publisher: United States Patent and Trademark Office
Other Date: Date Filed: 1977-01-21
Date Issued: 1978-10-10
Physical Form: application/pdf
Extent: 7 p.
Abstract/Description: A method for optically determining the stress-optical constants of optically isotropic and anisotropic materials. A collimated beam of monochromatic light is directed at the tip of a crack in a thin plate specimen under plane-stress from a direction substantially perpendicular to the surface of the specimen and to the direction of the stress. Reflected and transmitted stress-optical constants are determined from a ratio of the diameters of transmitted and reflected caustics from the specimen and the known Poisson's ratio and modulus of elasticity for the specimen.
Identifier(s): utpatents-US4119380 (IID)
Patent No.: US4119380 (patno)
Appl. No.: 05/761128 (appno)
Subject(s): 73/800
356/32
Held by: United States Patent and Trademark Office (USPTO) Public Search Facility
Location: University of Toledo Digital Repository
Rights Statement: No Copyright - United States
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