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Nonlinear viscoelastic modeling of soft polymers
Author(s) -
Zacharatos Antonios,
Kontou Evagelia
Publication year - 2015
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.42141
Subject(s) - viscoelasticity , nonlinear system , materials science , creep , constitutive equation , phenomenological model , elastomer , stress relaxation , relaxation (psychology) , polymer , standard linear solid model , deformation (meteorology) , composite material , mechanics , thermodynamics , finite element method , physics , psychology , social psychology , quantum mechanics
A one‐dimensional phenomenological constitutive model, representing the nonlinear viscoelastic behavior of polymers is developed in this study. The proposed model is based on a modification of the well‐known three element standard solid model. The linear dashpot is replaced by an Eyring type one, while the nonlinearity is enhanced by a nonlinear, strain dependent spring constant. The new constitutive model was proved to be capable of capturing the main aspects of nonlinear viscoelastic response, namely, monotonic and cyclic loading, creep and stress relaxation, with the same parameter values. Model validation was tested on the experimental results at various modes of deformation for two elastomeric type materials, performed elsewhere. A very good agreement between model simulations and experimental data was obtained in all cases. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42141.