Method and apparatus for the non-destructive testing of material

Details Method and apparatus for the non-destructive testing of material Method and apparatus for the non-destructive testing of material

1983-04-05

1985-05-28

Birmiel, Howard A.

Measuring and testing

Vibration

Resonance, frequency, or amplitude study

73573, 73588, G01N 2900

Patent

active

045192456

ABSTRACT:
A method and apparatus for the non-destructive testing of materials, particularly composite structures and other such laminated materials, which comprises repeatedly impacting the material being tested with a precisely regulated force having a pre-determined magnitude. The response generated by the material is detected by a sensor and a proportional electrical signal is generated. The electrical signal is compared with a stored electrical signal previously generated in response to impacting a defect-free reference material with the same precisely regulated pre-determined force. A difference in frequency and amplitude between the two compared electrical signals is indicative of a defect in the material being tested.

REFERENCES:
patent: 3580056 (1971-05-01), Warner
patent: 4128011 (1978-12-01), Savage
patent: 4281547 (1981-08-01), Hinshaw et al.
patent: 4342229 (1982-08-01), Massa
patent: 4400980 (1983-08-01), Lepert
patent: 4479386 (1984-10-01), Beggs et al.

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