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Simulation of thermomechanical processes in crystallizing polymer
Author(s) -
Shardakov I. N.,
Matveyenko V. P.,
Pistsov N. V.,
Beghishev V. P.
Publication year - 1997
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.11772
Subject(s) - crystallinity , materials science , crystallization , finite element method , realization (probability) , polymer , amorphous solid , constitutive equation , component (thermodynamics) , phase (matter) , stress (linguistics) , composite material , mechanics , thermodynamics , mathematics , physics , crystallography , chemistry , statistics , quantum mechanics , linguistics , philosophy
Constitutive equations are developed to describe the interrelation between thermomechanical behavior and phase transitions in crystallizing polymers. A crystalizing polymer is considered as a two‐component mixture of amorphous and crystalline structures, the fraction of which is defined by the degree of crystallinity. Numerical realization is performed using a variational method and a finite element procedure. The key feature of the calculation algorithm is reduction of a nonstationary problem to a sequence of stationary problems on a nonuniform time mesh. The validity of the proposed mathematical model is supported by the results of experiments performed to study the evolution of the stress‐strain state for a disk‐shaped polyamide 6 plate on crystallization.