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A Model for the Elastoplastic Behavior of Isotactic Poly(propylene) Below the Yield Point
Author(s) -
Drozdov Aleksey D.,
Christiansen Jesper deC.
Publication year - 2003
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.200390009
Subject(s) - materials science , composite material , ultimate tensile strength , tacticity , isothermal process , tensile testing , stress (linguistics) , constitutive equation , strain (injury) , yield (engineering) , crystallinity , polymer , structural engineering , thermodynamics , finite element method , medicine , linguistics , philosophy , physics , polymerization , engineering
Observations are reported on isotactic poly(propylene) (iPP) in a series of tensile loading‐unloading tests with a constant strain rate at room temperature. A constitutive model is developed for the elastoplastic behavior of a semicrystalline polymer at isothermal uniaxial deformations with small strains. The stress‐strain relations are determined by 5 adjustable parameters which are found by fitting the experimental data.The stress σ (MPa) versus strain ε in a tensile loading‐unloading test with the maximum strain ε max = 0.09. Circles: experimental data. Solid line: results of numerical simulation.