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On modeling shape memory polymers as elastic two-phase composite materials

Article dans une revue avec comité de lecture
Auteur
GILORMINI, Pierre
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
DIANI, Julie
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]

URI
http://hdl.handle.net/10985/6558
DOI
10.1016/j.crme.2012.02.016
Date
2012

Résumé

A model has been proposed recently, which describes the experimentally observed mechanical behavior of some shape memory polymers. It considers a purely thermoelastic behavior, without strain rate effects, and assumes essentially that the polymer can be considered as a two-phase composite, with glassy and rubbery phases having volume fractions that depend on temperature only. Since a uniform stress hypothesis was used in the original formulation, with an inconsistency when thermal expansion was considered, this model is revisited here by taking advantage of the many results that have been established in the theory of composite materials. It is shown, especially, that a uniform strain hypothesis is more appropriate than assuming a uniform stress.

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CRAS-SMP-Revised.pdf
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  • Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM)

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  • Using a pattern-based homogenization scheme for modeling the linear viscoelasticity of nano-reinforced polymers with an interphase 
    Article dans une revue avec comité de lecture
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    The self-consistent model based on morphological representative patterns is applied to the realistic case of the linear viscoelasticity of polymers reinforced by elastic nano-particles coated with a viscoelastic interphase. ...
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    Article dans une revue avec comité de lecture
    DIAZ, Rodrigo; DIANI, Julie; GILORMINI, Pierre (Elsevier, 2014)
    A 40 phr carbon-black filled styrene butadiene rubber has been submitted to several experiments in order to identify the physical damage responsible for the mechanical softening recorded upon first stretch. Damage in the ...
  • A review on the Mullins effect 
    Article dans une revue avec comité de lecture
    GILORMINI, Pierre; DIANI, Julie; ccFAYOLLE, Bruno (Elsevier, 2009)
    The Mullins’ effect remains a major challenge in order to provide good mechanical modeling of the complex behavior of industrial rubber materials. It’s been forty years since Mullins [1] wrote his review on the phenomenon ...
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    Article dans une revue avec comité de lecture
    DIANI, Julie; GILORMINI, Pierre; ccFAYOLLE, Bruno (Taylor & Francis, 2008)
    The temperature dependence of the bulk modulus of polyisoprene has been studied using molecular dynamics simulations. Virtual polyisoprenes have been submitted to volume contractions above and below the glass transition. ...
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    Article dans une revue avec comité de lecture
    DIANI, Julie; GILORMINI, Pierre; MERCKEL, Yannick; VION-LOISEL, Fabien (Elsevier, 2013)
    Micromechanics modeling of the linear viscoelasticity of carbon-black filled styrene butadiene rubbers (SBR) shows that a simple representation of a spherical rigid-phase surrounded by rubber gum and embedded in an homogeneous ...

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