DOI: https://doi.org/10.26089/NumMet.v18r212

A simplified numerical method to determine the shear stress relaxation time parameters by the example of polymers

Authors

  • M.S. Voronin

Keywords:

Maxwellian model
shear stress relaxation
yield stress
stress-strain curves
polymethylmethacrylate
polytetrafluoroethylene
epoxy resin

Abstract

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.

New computational technologies

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Published

2017-04-13

Issue

Vol. 18 (2017): Issue 2.

Section

Section 1. Numerical methods and applications

Author Biography

M.S. Voronin

Lavrent'ev Institute of Hydrodynamics of SB RAS
• Junior Researcher

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