Premium
A uniform phenomenological constitutive model for glassy and semicrystalline polymers
Author(s) -
Duan Y.,
Saigal A.,
Greif R.,
Zimmerman M. A.
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.10832
Subject(s) - materials science , polycarbonate , constitutive equation , crystallinity , polymer , phenomenological model , composite material , deformation (meteorology) , hardening (computing) , strain rate , stress (linguistics) , thermodynamics , finite element method , physics , linguistics , philosophy , layer (electronics) , quantum mechanics
A phenomenological constitutive model is proposed on the basis of four models: the Johnson‐Cook model, the G'Sell‐Jonas model, the Matsuoka model, and the Brooks model. The proposed constitutive model has a concise expression of stress dependence on strain, strain rate and temperature. It is capable of uniformly describing the entire range of deformation behavior of glassy and semicrystalline polymers, especially the intrinsic strain softening and subsequent orientation hardening of glassy polymers. At least three experimental stress‐strain curves including variation with strain rate and temperature are needed to calibrate the eight material coefficients. Sequential calibration procedures of the eight material coefficients are given in detail. Predictions from the proposed constitutive model are compared with experimental data of two glassy polymers, polymethyl‐methacrylate and polycarbonate under various deformation conditions, and with that of the G'Sell‐Jonas model for polyamide 12, a semicrystalline polymer.