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Time‐dependent response of polypropylene/clay nanocomposites under tension and retraction
Author(s) -
Drozdov Aleksey D.,
Christiansen Jesper deC.
Publication year - 2013
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.23340
Subject(s) - materials science , polypropylene , viscoelasticity , composite material , nanocomposite , viscoplasticity , stress relaxation , tension (geology) , constitutive equation , relaxation (psychology) , deformation (meteorology) , ultimate tensile strength , structural engineering , creep , finite element method , psychology , social psychology , engineering
Observations are reported in relaxation tests under tension and retraction on polypropylene/clay nanocomposites with various contents of filler. A two‐phase constitutive model is developed in cyclic viscoelasticity and viscoplasticity of nanocomposites. Adjustable parameters in the stress–strain relations are found by fitting the observations. Ability of the constitutive equations to describe characteristic features of the time‐dependent behavior of nanocomposites under cyclic deformation is confirmed by numerical simulation. POLYM. ENG. SCI., 2013 © 2012 Society of Plastics Engineers