Calculation of Stress-Strain Curves from Relaxation Data in the Rubbery- Flow Region
MONSANTO RESEARCH CORP ST LOUIS MO
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Time dependent, stress relaxation curves for polysulfone and lexan polycarbonate at constant temperature are obtained. The strain independent stress relaxation curves can be used to calculate stress-strain curves at different rates of strain according to the linear viscoelastic theory. The agreement between experimental and calculated stress-strain curves is good at least up to about 60 strain in the range of 0.01 to 0.2 inmin rate of extension.