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Approximate model for analyzing frozen‐in strains and shrinkage of extruded PVC lineal profiles
Author(s) -
Ray Harrell E.
Publication year - 1998
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.10034
Subject(s) - shrinkage , materials science , superposition principle , strain (injury) , deformation (meteorology) , composite material , stress–strain curve , stress (linguistics) , mathematics , medicine , mathematical analysis , linguistics , philosophy
A mathematical model, based upon utilization of an “approximate” time‐temperature superposition for estimating stress‐strain properties of PVC, was derived for analyzing shrinkage of extruded PVC profiles. The model is composed of a single deformation, followed by a strain recovery (shrinkage) at the same or a different temperature. Profile shrinkage at any given time and temperature can be reduced by decreasing the magnitude of the imposed frozen‐in strain, increasing the temperature at which the strain is imposed, and/or increasing the time that is required to impose the strain. The model provides good estimates of the shrinkage of extruded profiles.