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Effect of yielding on the viscoelastic response of amorphous glassy polymers
Author(s) -
Drozdov Aleksey D.
Publication year - 2001
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.1345
Subject(s) - viscoelasticity , polycarbonate , amorphous solid , polymer , materials science , relaxation (psychology) , yield (engineering) , glass transition , stress relaxation , constitutive equation , thermodynamics , polymer chemistry , composite material , physics , chemistry , organic chemistry , finite element method , psychology , social psychology , creep
Constitutive equations are derived for the nonlinear viscoelastic behavior of amorphous glassy polymers. The model is based on the theory of cooperative relaxation in a version of the trapping concept. Stress–strain relations are applied to fit experimental data for polycarbonate in the sub‐yield and post‐yield regions. Fair agreement is demonstrated between observations and results of numerical simulation. It is revealed that yielding causes substantial changes in the energy landscape of amorphous polymers. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 2383–2393, 2001