Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Content or effect of a constituent of a liquid mixture
Patent
1975-04-10
1976-07-20
Myracle, Jerry W.
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Content or effect of a constituent of a liquid mixture
G01N 334
Patent
active
039699307
ABSTRACT:
An apparatus and method for testing viscoelastic solids, such as tire cord. The apparatus includes: a holding means, a pretension means, a displacement generator, and a mechanical-electrical transforming means. The holding means holds the material in a predetermined position. The pretension means applies tension during testing. The displacement generator has an eccentric means for applying cyclic displacement. The mechanical-electrical transforming means transforms mechanical motion into electrical signals, such as a stress signal, a strain signal and a differentiated strain signal. There is a phase lag between the stress signal and the strain signal and the phase lag may vary in amount and direction as a function of time. The apparatus may also include: an integrating means for integration of a stress-strain hysteresis loop; and a display means for displaying an output of the integrating means to measure the area of the hysteresis loop and thereby determine energy loss. The method includes: applying strain to the material, with resulting stress developed in the material; transforming the strain into an electrical strain signal having a strain wave form; transforming the resulting stress into an electrical stress signal having a stress wave form; controlling the strain to produce a substantially sinusoidal strain wave form representing strain; and allowing the stress to produce a stress wave form representing stress which may be non-sinusoidal or sinusoidal.
REFERENCES:
patent: 1558594 (1925-10-01), Coffin
patent: 2916912 (1959-12-01), Gibson
patent: 3214969 (1965-11-01), Swanson
patent: 3826902 (1974-07-01), Claxton et al.
Gilliam Edward T.
Kwon Young Doo
Prevorsek Dusan Ciril
Sharma Raj Kumar
Allied Chemical Corporation
Kirby, Jr. John P.
Myracle Jerry W.
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