Nondestructive detection of stress

Details Nondestructive detection of stress Nondestructive detection of stress

1976-07-14

1977-09-20

Gill, James J.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Content or effect of a constituent of a liquid mixture

73 715US, 73 885R, G01N 2900

Patent

active

040488470

ABSTRACT:
Stress is detected by magnetostrictively generating vibrations which are detected at a location spaced from the region of generation. The efficiency of the generation is indicative of stress if the region is magnetically biased to less than maximum amplitude for the vibrations as produced. Preferably, the needed bias for generating vibrations at a constant level is used as stress indicator. Due to reciprocity of magnetostriction, the efficiency of generating magnetic oscillations by means of elastic vibrations in a biased region can be detected.

REFERENCES:
patent: 2461543 (1949-02-01), Gunn
patent: 3555887 (1971-01-01), Wood
patent: 3861206 (1975-01-01), Kawafune et al.

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