Measuring and testing – Vibration – Mechanical impedance
Patent
1980-07-28
1982-10-05
Ciarlante, Anthony V.
Measuring and testing
Vibration
Mechanical impedance
73584, 73574, G01N 2900
Patent
active
043522920
ABSTRACT:
A method and apparatus for measuring the dynamic material constants of rur compounds. The rubber compound is tested in strip form by attaching one end of the strip to an electromechanical shaker while the opposite end of the strip is suspended under constant tension. The electromechanical shaker propagates an acoustic wave in the test strip and a piezoelectric transducer positioned at a first point on the test strip measures the mechanical response of the strip for phase and amplitude. The shaker is programmed to step piecewise over the frequency range from 100 Hz to 40 KHz by a frequency synthesizer. The distance between the shaker and the transducer is changed and data is obtained for a second point on the strip. The test values obtained are used to calculate Young's Modulus and the loss factor for the rubber compound.
REFERENCES:
patent: 3176505 (1965-04-01), Hendrickson
patent: 3550427 (1970-12-01), Sueyoshi et al.
patent: 3933032 (1976-01-01), Tschoegl
Lee Gilbert F.
Madigosky Walter M.
Branning A. L.
Ciarlante Anthony V.
Henderson W. R.
Sciascia R. S.
The United States of America as represented by the Secretary of
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