Method and apparatus for measuring visco-elasticity of composite

Details Method and apparatus for measuring visco-elasticity of composite Method and apparatus for measuring visco-elasticity of composite

1977-11-30

1979-03-27

Goldstein, Herbert

Measuring and testing

Gas content of a liquid or a solid

By vibration

73159, G01N 332

Patent

active

041459121

ABSTRACT:
The present invention relates to a method and apparatus for measuring the viscoelasticity of a sheet material comprising a flexible organic and/or inorganic reinforcement impregnated with a synthetic resin, wherein a sample of said sheet is subjected to a heating cycle and, during this cycle, said sample is held stretched between two of its spaced-apart zones and a maintained reciprocating movement of constant amplitude, of direction coplanar with respect to the plane of said sample and transverse with respect to the direction of tension thereof, is imparted to one of said zones, then the variations in amplitude of the reciprocating movement transmitted to the other of said zones with the rise in temperature are observed. The invention is more particularly applied to the manufacture of composite pieces by assembling, by hot-pressing, a plurality of sheets impregnated with resin.

REFERENCES:
patent: 3039297 (1962-06-01), Peter et al.
patent: 3531996 (1970-10-01), Harris et al.
patent: 4034602 (1977-07-01), Woo

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