Low cycle fatigue damage counter

Details Low cycle fatigue damage counter Low cycle fatigue damage counter

1975-10-30

1977-06-21

Morrison, Malcolm A.

Registers

Transfer mechanism

Traveling pawl

73 673, 235 92MT, G01V 128, G01M 700

Patent

active

040313662

ABSTRACT:
An electrical input signal representative of the existing operating state of a rotating bladed disk or other rotating member is classified into one of a plurality of predetermined operating states and a sequence detector is employed for detecting the occurrence of one of a plurality of possible predetermined sequences of such operating states. Predetermined fixed damage coefficients are then correlated with respectively corresponding detected predetermined sequences of operating states and accumulated with other similarly selected damage coefficients so as to provide a cumulative indication of low cycle fatigue damage done to the rotating member over its past history of experienced operating state sequences.

REFERENCES:
patent: 3711686 (1973-01-01), Apitz
patent: 3744300 (1973-07-01), Fleury
patent: 3777555 (1973-12-01), Petrisko et al.
patent: 3835305 (1974-09-01), Kus
patent: 3841149 (1974-10-01), Edwin et al.
patent: 3878384 (1975-04-01), Bowker
patent: 3914996 (1975-10-01), Davis et al.
patent: 3979579 (1976-09-01), Kleinpeter

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