"A simplified numerical method to determine the shear stress relaxation time parameters by the example of polymers"
Voronin M.S.

A numerical method to determine the parameters of the shear stress relaxation time is discussed. This function is one of the constitutive equations of a Maxwellian viscoelastic model. The method is based on a simplification of the system of equations describing the deformation of a thin rod when this system is considered at the yield stress point. The method allows one to find the relaxation time parameters responsible for the yield stress description in a wide range of temperatures and strain rates. The numerical results obtained by the method are compared with experimental data for polymethylmethacrylate, polytetrafluoroethylene, and epoxy resin.

Keywords: Maxwellian model, shear stress relaxation, yield stress, stress-strain curves, polymethylmethacrylate, polytetrafluoroethylene, epoxy resin.

  • Voronin M.S. – Lavrentyev Institute of Hydrodynamics, Siberian Branch of Russian Academy of Sciences; Lavrentyev prospekt 15, Novosibirsk, 630090, Russia; Junior Scientist, e-mail: mihause@academ.org