Apparatus for measuring viscoelasticity

Details Apparatus for measuring viscoelasticity Apparatus for measuring viscoelasticity

1988-04-19

1989-05-16

Myracle, Jerry W.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

374 48, G01N 322

Patent

active

048298301

ABSTRACT:
In an apparatus for measuring viscoelasticity, dies are provided in their working face with a plurality of grooves arranged in a radial pattern, each groove cut to increase in width toward the periphery of the die face. Because of this groove design, air bubbles are unlikely to remain in the specimen. In addition, the specimen is far much less likely to slip between the opposed die faces in rotational oscillation generated therein for purposes of measurement, so that reduction in oscillatory angle, lessening of torque and friction disturbances that might otherwise occur as a result of slippage, are prevented. Since the shearing stresses generated in the specimen are transmitted to a torque detection die accurately as torques, precise detection of torque as a function of the viscoelastic stress in the specimen becomes possible.

REFERENCES:
patent: 3479858 (1969-11-01), Umeno et al.
patent: 3720099 (1973-03-01), Wolff et al.
International Standard ISO 6502-Ref. No. ISO 6502-1983(E) Dec. 15, 1983.
International Standard ISO 3417-Ref. No. 3417-1977(E) Feb. 1, 1977.
Japanese Publication 3105-1980-Measurement of Curing Characteristics with Oscillating Type Curemeter.

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