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On necessary precautions when measuring solid polymer linear viscoelasticity with dynamic analysis in torsion

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

URI
http://hdl.handle.net/10985/12466
DOI
10.1016/j.polymertesting.2017.08.025
Date
2017
Journal
Polymer Testing

Résumé

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 tests can show a dependency of the storage modulus and damping factor on the dimensions of the rectangular prismatic specimen when linear temperature ramps are applied. While the discrepancy of damping factor is explained by temperature heterogeneities and can be corrected easily by applying temperature steps, the inconsistency of storage modulus is due to an invalid application of the Saint-Venant solution. Finite element simulations allowed definition of the sample dimensions for which the Saint-Venant solution provides a good approximation, and a coefficient is given to correct the results obtained with commercial rheometers when other sample dimensions are used.

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PIMM-PT-DIANI-2017.pdf
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Format:
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Fin d'embargo:
2018-06-30
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  • Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM)

Documents liés

Visualiser des documents liés par titre, auteur, créateur et sujet.

  • Molecular mobility with respect to accessible volume in Monte Carlo lattice model for polymers 
    Article dans une revue avec comité de lecture
    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 ...
  • Stress-strain response and volume change of a highly filled rubbery composite: experimental measurements and numerical simulations 
    Article dans une revue avec comité de lecture
    GILORMINI, Pierre; TOULEMONDE, Paul-Aymé; DIANI, Julie; GARDERE, Antoine (Elsevier, 2017)
    The stress-strain response of a rubbery polymer network highly filled with micrometric glass beads was measured at low strain rate in uniaxial tension. The volume change of the glass bead filled material upon stretching ...
  • Some features of the PPR cohesive-zone model combined with a linear unloading/reloading relationship 
    Article dans une revue avec comité de lecture
    GILORMINI, Pierre; DIANI, Julie (Elsevier, 2017)
    A loading/unloading/reloading process is applied to a cohesive zone where the model proposed by Park, Paulino and Roesler in 2009 is combined with a linear unloading/reloading relationship. The applied loading and unloading ...
  • A torsion test for the study of the large deformation recovery of shape memory polymers 
    Article dans une revue avec comité de lecture
    DIANI, Julie; FREDY, Carole; GILORMINI, Pierre; MERCKEL, Yannick; ROUSSEAU, Ingrid; ccREGNIER, Gilles (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 ...
  • On the account of a cohesive interface for modeling the behavior until break of highly filled elastomers 
    Article dans une revue avec comité de lecture
    TOULEMONDE, Paul-Aymé; DIANI, Julie; GILORMINI, Pierre; DESGARDIN, Nancy (Elsevier, 2016)
    The nonlinear behavior and failure of highly filled elastomers are significantly impacted by the volume fraction, the size and nature of fillers and the matrix stiffness. Original experimental data obtained on glass beads ...

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