Thermal emission flaw detection method

Details Thermal emission flaw detection method Thermal emission flaw detection method

1978-11-30

1980-11-11

Swisher, S. Clement

Measuring and testing

Vibration

Fatigue study

73104, 73355R, 73356, 73762, 73799, 73805, G01N 332

Patent

active

042325544

ABSTRACT:
A method of detecting very small structural flaws at loads below those which cause the flaws to propagate is disclosed. Certain phenomena and relationships of fracture mechanics are utilized in conjunction with the generation, detection and interpretation of thermal emission signals indicative of plastic deformation of the tested material.

REFERENCES:
patent: 1680589 (1928-08-01), Bock
patent: 3168825 (1965-02-01), Prochazka
patent: 3511086 (1970-05-01), Woodmansee
patent: 3596519 (1971-08-01), Blonder et al.
Rice, J. R. et al., Local Heating by Plastic Deformation at a Crack Tip, in The Physics of strength and plasticity, ed by Agon, M.I.T. Press Cambridge 1969.
Charles, J. A., et al., "Using the Scanning Infrared Camera in Experimental Fatique Studies", Experimental Mechanics, 15(4) 133-138.

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