Method for determining stress-optical constants of optically iso

Details Method for determining stress-optical constants of optically iso Method for determining stress-optical constants of optically iso

1977-01-21

1978-10-10

McGraw, Vincent P.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

356 32, G01B 1116

Patent

active

041193806

ABSTRACT:
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.

REFERENCES:
reflected Shadow Method for the Study of Constrained Zones in Cracked Plates; Theocaris; Applied Optics; vol. 10, No. 10; Oct. 1971, pp. 2240-2247.

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