RHEOLOGICAL BEHAVIOR OF A FILLED ELASTOMER.
Technical rept. no. 23
COLUMBIA UNIV NEW YORK
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Rheological behavior of a filled elastomer consisting of a polyurethane rubber and granular potassium chloride was investigated with both long- and short-time loading producing conditions of torsion, uniaxial tension and compression. The volumetric response of the elastomer was also studied. To represent the observed behavior for moderate stresses and strains a linear viscoelastic model is developed. The results of torsion relaxation tests performed on an inert solid propellant are presented for three strain levels over the temperature range -60F to 200F. Author