Cone-plate instrument for stress relaxation measurements

  • Bohlin L
  • Carlson T
  • Bäckström G
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Abstract

An instrument for the measurement of stress relaxation in shear is described. The force is detected by a sensitive piezoresistive pressure transducer. The requirement of constant strain can be fulfilled within less than 1%. Preset values of shear strain can be imposed on the sample within 0.1 sec. This instrument is suitable for soft solids and elastic liquids with a lower limit of ∼ 1 sec for the relaxation time. Results are given for wheat flour dough, a gelatinous deoxycholate complex and a gelatin gel. The instrument is simple, robust, and reliable, as well as inexpensive. © 1980.

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Authors

  • L. Bohlin

  • T. L.G. Carlson

  • G. Bäckström

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