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Nonlinear viscoelastic and viscoplastic response of glassy polymers
Author(s) -
Spathis G.,
Kontou E.
Publication year - 2001
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.10834
Subject(s) - viscoelasticity , viscoplasticity , materials science , creep , crosshead , composite material , softening , yield (engineering) , ultimate tensile strength , strain rate , polymer , stress relaxation , work (physics) , stress (linguistics) , nonlinear system , constitutive equation , thermodynamics , glass fiber , finite element method , physics , quantum mechanics , linguistics , philosophy
The main features of inelastic mechanical behavior of glassy state were studied theoretically and experimentally in terms of tensile stress‐strain and tensile creep experiments. A theoretical treatment introduced in earlier work, which takes into account the viscoelastic path at small strains and the viscoplastic one at higher stresses, proved to be capable of describing the main aspects of mechanical response of glassy polymers, i.e. nonlinear viscoelasticity during creep procedure, and yield stress, yield strain, strain softening and rate effect in a constant crosshead speed test.