A Shear Wave Rheology Sensor

F. Cohen-Tenoudji; W. J. Pardee; Bernhard R. Tittmann; Lloyd A. Ahlberg; Richard K. Elsley

doi:10.1109/T-UFFC.1987.26941

A Shear Wave Rheology Sensor

F. Cohen-Tenoudji, W. J. Pardee, Bernhard R. Tittmann, Lloyd A. Ahlberg, Richard K. Elsley

Engineering Science and Mechanics

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

A rheology sensor for monitoring the dynamic viscosity of a thermally curing resin is described. The complex shear modulus of the resin at 1 MHz is derived from the measured reflection coefficient of shear wave pulses at the resin surface. A special transducer-buffer assembly has been developed that operates at high temperature (T = 145°C) and provides a reference calibration signal. With this assembly, absolute determinations are made throughout the cure cycle of the real and imaginary components of the shear modulus. From the latter high-frequency dynamic viscosity is calculated. The results are compared with data obtained at low shear rates with a 10 Hz torque viscometer.

Original language	English (US)
Pages (from-to)	263-269
Number of pages	7
Journal	IEEE transactions on ultrasonics, ferroelectrics, and frequency control
Volume	34
Issue number	2
DOIs	https://doi.org/10.1109/T-UFFC.1987.26941
State	Published - Mar 1987

All Science Journal Classification (ASJC) codes

Instrumentation
Acoustics and Ultrasonics
Electrical and Electronic Engineering

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abstract = "A rheology sensor for monitoring the dynamic viscosity of a thermally curing resin is described. The complex shear modulus of the resin at 1 MHz is derived from the measured reflection coefficient of shear wave pulses at the resin surface. A special transducer-buffer assembly has been developed that operates at high temperature (T = 145°C) and provides a reference calibration signal. With this assembly, absolute determinations are made throughout the cure cycle of the real and imaginary components of the shear modulus. From the latter high-frequency dynamic viscosity is calculated. The results are compared with data obtained at low shear rates with a 10 Hz torque viscometer.",

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AU - Cohen-Tenoudji, F.

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AU - Tittmann, Bernhard R.

AU - Ahlberg, Lloyd A.

AU - Elsley, Richard K.

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AB - A rheology sensor for monitoring the dynamic viscosity of a thermally curing resin is described. The complex shear modulus of the resin at 1 MHz is derived from the measured reflection coefficient of shear wave pulses at the resin surface. A special transducer-buffer assembly has been developed that operates at high temperature (T = 145°C) and provides a reference calibration signal. With this assembly, absolute determinations are made throughout the cure cycle of the real and imaginary components of the shear modulus. From the latter high-frequency dynamic viscosity is calculated. The results are compared with data obtained at low shear rates with a 10 Hz torque viscometer.

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