Abstract
The authors discuss the relaxation of the first difference of the normal stresses σ(t) after cessation of steady shear flow in viscoelastic polymer systems in the linear region of their mechanical behavior. They show that this phenomenon is associated with a group of relaxation characteristics of the material. they discuss a method of calculating the relaxation spectrum from σ(t); the validity of this suggested method is verified experimentally.
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Additional information
A. V. Topchiev Institute of Petrochemical Synthesis, Academy of Sciences of the USSR, Moscow. Translated from Mekhanika Polimerov, No. 2, pp. 335–339, March–April, 1975.
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Malkin, A.Y., Zabugina, M.P. Relaxation of normal stresses in flowing polymer systems. Polymer Mechanics 11, 283–286 (1975). https://doi.org/10.1007/BF00854736
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DOI: https://doi.org/10.1007/BF00854736