Adherent crack gauge

Details Adherent crack gauge Adherent crack gauge

1979-06-14

1981-03-17

Ciarlante, Anthony V.

Measuring and testing

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

Specified electrical sensor or system

73799, G01B 2100

Patent

active

042559740

ABSTRACT:
A crack gauge for monitoring the progress of fatigue crack propagation in a conductive substrate is made by applying an inorganic insulating layer and then a metallic conductor. The conductor is laid in a geometry which results in a change in a measured electrical property of the conductor (e.g., resistance) as a fatigue crack propagates through the substrate and breaks the conductor. The adherent crack gauge is especially reliable in hostile environments. A special conductor geometry is useful for especially fatigue resistant substrates.

REFERENCES:
patent: 2986928 (1961-06-01), White
patent: 3596269 (1971-07-01), Laska
patent: 3786679 (1974-01-01), Crites
patent: 3803485 (1974-04-01), Crites et al.
patent: 3948089 (1976-04-01), Shaw et al.

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