Metal fatigue detector

Details Metal fatigue detector Metal fatigue detector

1991-03-29

1993-08-24

Myracle, Jerry W.

Measuring and testing

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

Specified electrical sensor or system

7386268, G01B 716

Patent

active

052378756

ABSTRACT:
A device for detecting fatigue of a monitored structure due to flexure comprises a fuse made of the same material as the monitored structure and formed with a failure portion designed to fail because of fatigue prior to failure of the monitored structure when the fuse and the monitored structure both experience the same stress history. An adhesive secures the fuse to the monitored structure and extends substantially over the entirety of a side of the fuse that is adjacent to the monitored structure. However, the adhesive is spaced apart from the failure portion. The adhesive ensures that the fuse and the monitored structure experience substantially the same stress history in both tension and compression yet does not inhibit failure of the failure portion. The device can be monitored locally by sight or can be used as part of a remote-monitoring system.

REFERENCES:
patent: 3136154 (1964-06-01), Christensen
patent: 3596269 (1971-07-01), Laska
patent: 3782178 (1974-01-01), Thomas
patent: 3786679 (1974-01-01), Crites
patent: 3979949 (1976-09-01), Smith
patent: 4590804 (1986-05-01), Brull
patent: 4639997 (1987-02-01), Brull

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