Optics: measuring and testing – Material strain analysis – With polarized light
Patent
1975-09-15
1976-11-30
Bauer, Edward S.
Optics: measuring and testing
Material strain analysis
With polarized light
73 88A, 356 35, G01B 1118
Patent
active
039945987
ABSTRACT:
The coating comprises a sheet of photoelastic material having a multiplicity of regions, in each of which is a plurality of measuring elements at predetermined angles. Each of the measuring elements has an abutment and a finger in operating contact with each other. There will appear in each finger patterns representative of the strain in the associated portion of the workpiece. These patterns are "read" and the values plugged into formulas to determine the magnitude of the strain in each of the two principal directions, and the angle of the principal directions.
REFERENCES:
patent: 2014688 (1935-09-01), Mabboux
patent: 3130383 (1964-04-01), Hottinger
patent: 3196676 (1965-07-01), Pien
patent: 3313204 (1967-04-01), Oppel
patent: 3559467 (1971-02-01), Gurol et al.
Van Leeuwen et al. "Resistance Wire Strain Gage Applications & Circuits" Product Engineering, July 1945, pp. 443-448.
Budd, Advertisement from The Budd Co., P.O. Box 245, Phoenixville, Pa.-Strain Gage Readings, vol. 6, No. 3, Aug.-Sept. 1963, p. 79.
Bauer Edward S.
Punter Wm. H.
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