A Shear Wave Rheology Sensor

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

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


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 languageEnglish (US)
Pages (from-to)263-269
Number of pages7
JournalIEEE transactions on ultrasonics, ferroelectrics, and frequency control
Issue number2
StatePublished - Mar 1987

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Acoustics and Ultrasonics
  • Electrical and Electronic Engineering


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