Method and apparatus for predicting fatigue by introducing a con

Measuring and testing – Vibration – Fatigue study

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73584, G01N 2900

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active

056146744

ABSTRACT:
The fatigue integrity of metallic materials may be determined by either one of two methods. In a first method, an impulse of energy is introduced into the material, such as by striking the material (20), and the induced vibration is sensed and analyzed in order to compute the damping factor thereof, the damping factor being directly related to the fatigue thereof. With this method, a transducer (28) is coupled to the material and its output is amplified by an amplifier (30) before input to a computer (32) which determines the damping factor. In a second method, a continuous energy input is provided to the material, such as by utilizing a frequency generator coupled to a power amplifier whose output drives a transducer such as a speaker or the like for inducing a continuous vibration in the metallic material. This continuous vibration is measured with a transducer, an amplifier, and a damping factor calculated with a computer as in the first method.

REFERENCES:
patent: 3014364 (1961-12-01), Crooks
patent: 3106838 (1963-10-01), Crooks
patent: 3153338 (1964-10-01), Kleesattel
patent: 3531982 (1970-10-01), Clotfelter et al.
patent: 3744299 (1973-07-01), Bliss
patent: 3857279 (1974-12-01), Salzer
patent: 4031744 (1977-06-01), Flannelly
patent: 4064745 (1977-12-01), Gaddum
patent: 4297884 (1981-11-01), Leveque et al.
patent: 4542639 (1985-09-01), Cawley
patent: 4646754 (1987-03-01), Seale
patent: 4705146 (1987-11-01), Tarter
patent: 4854172 (1989-08-01), Lemaster et al.
patent: 4918616 (1990-04-01), Yoshimura et al.
patent: 5210704 (1993-05-01), Husseiny
patent: 5305645 (1994-04-01), Reifsnider et al.
patent: 5402781 (1995-04-01), Dimarogonas
patent: 5476009 (1995-12-01), Dimarogonas
The American Society of Mechanical Engineering paper entitled Structural Damping, presented at a colloquium on structural damping held at the ASME annual meeting, pp. 1-34, Dec. 1959.
Calcified Tissue International article entitled Material Damping for Monitoring of Density and Strength of Bones, by Andrew D. Dimarogonas et al., 1993, 52:244-247.

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