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

Type
Articles dans des revues 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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  • Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM)

Documents liés

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  • A torsion test for the study of the large deformation recovery of shape memory polymers 
    DIANI, Julie; FREDY, Carole; GILORMINI, Pierre; MERCKEL, Yannick; REGNIER, Gilles; ROUSSEAU, Ingrid (Elsevier, 2011)
    A torsion device was designed and built for testing the shape fixity and shape recovery of shape memory polymers at large deformation. A simple thermal chamber was used to regulate the thermal environment during testing ...
  • Molecular mobility with respect to accessible volume in Monte Carlo lattice model for polymers 
    DIANI, Julie; GILORMINI, Pierre (Elsevier, 2017)
    A three-dimensional cubic Monte Carlo lattice model is considered to test the impact of volume on the molecularmobility of amorphous polymers. Assuming classic polymer chain dynamics, the concept of locked volume limiting ...
  • On necessary precautions when measuring solid polymer linear viscoelasticity with dynamic analysis in torsion 
    DIANI, Julie; GILORMINI, Pierre (Elsevier, 2017)
    Solid polymer linear viscoelasticity in shear is often characterized by applying torsion and using the Saint-Venant solution when rectangular prismatic specimens are considered. It is shown that experimental dynamic torsion ...
  • A numerical study of the influence of polydispersity on the behaviour until break of a reinforced hyperelastic material with a cohesive interface 
    TOULEMONDE, Paul-Aymé; DIANI, Julie; GILORMINI, Pierre; DESGARDIN, Nancy (EDP Sciences, 2015)
    Solid propellants manufacturers commonly monitor the granulometries of the explosive fllers they introduce in the material to pack high fller volume fraction and thus obtain satisfactory energetic performance. However, to ...
  • Direct experimental evidence of time-temperature superposition at finite strain for an amorphous polymer network 
    DIANI, Julie; GILORMINI, Pierre; ARRIETA, Juan Sebastian (Elsevier, 2015)
    The time-temperature superposition property of an amorphous polymer acrylate network is characterized at infinitesimal strain by standard dynamic mechanical analysis tests. Comparison of the shift ...

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