Non-destructive testing of structural elements for fatigue by me

Details Non-destructive testing of structural elements for fatigue by me Non-destructive testing of structural elements for fatigue by me

1978-11-02

1981-03-10

McGraw, Vincent P.

Optics: measuring and testing

Material strain analysis

73762, G01B 1116

Patent

active

042550491

ABSTRACT:
Fatigue in structural elements is determined by measuring the loss in specular reflection in a foil of polished metal secured to an exposed surface of the tested object, the elastic limit of the foil material under shearing stresses being lower than that of the tested object, and the foil consisting either of a single crystal or of polycrystalline material of uniform, small grain size.

REFERENCES:
patent: 3272003 (1966-09-01), Harting
patent: 3462223 (1969-08-01), Tiemann et al.
patent: 3715915 (1973-02-01), Williams
patent: 4015465 (1977-04-01), Scott
"Luftfahrttechnik/Raumfahrttechnik", vol. 14, Jul./Aug. 1968, p. 196.

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