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Relationship between local damage and macroscopic response of soft materials highly reinforced by monodispersed particles

Article dans une revue avec comité de lecture
Auteur
DE FRANCQUEVILLE, Foucault
1167 Laboratoire de Mécanique des Solides [LMS]
GILORMINI, Pierre
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
DIANI, Julie
1167 Laboratoire de Mécanique des Solides [LMS]
VANDENBROUCKE, Aude
535110 ArianeGroup

URI
http://hdl.handle.net/10985/18437
DOI
10.1016/j.mechmat.2020.103408
Date
2020
Journal
Mechanics of Materials

Résumé

A rubberlike matrix highly filled with spherical micrometric glass beads is submitted to uniaxial tension tests until break. X-ray tomography imaging performed on the material while submitted to uniaxial tension reveals early debonding at the matrix/filler interfaces at the poles of the particles followed by void coalescence creating damage localization. The latter causes a downturn of the macroscopic stress-strain response. These phenomena are analyzed further with three-dimensional finite element simulations, where 64 spherical beads are distributed randomly in a periodic cell. A simple version of the Tvergaard-Hutchinson cohesive-zone model allows to reproduce all the experimental trends well. The effects of the three parameters involved are analyzed, and three different types of macroscopic behaviors are observed corresponding to three different microstructure damages. The value of the initial stiffness of the interface, limited by numerical convergence, has little effect on how the local damage evolves but has a significant impact on the overall macroscopic stress values. The local damage is strongly dependent on the critical strength and the separation failure displacement, and the adhesion energy may be considered as a resulting parameter of the two previous ones. The interfacial critical strength appears to have a significant impact on the damage initiation, either spread across the structure for low values, or localized for high values. Increasing the interface separation failure displacement delays the possible loss of adhesion to a higher strain and preserves the integrity of the composite material.

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Fin d'embargo:
2020-01-01
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Documents liés

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  • Comparison of the finite strain macroscopic behavior and local damage of a soft matrix highly reinforced by spherical or polyhedral particles 
    Article dans une revue avec comité de lecture
    DE FRANCQUEVILLE, Foucault; GILORMINI, Pierre; DIANI, Julie; VANDENBROUCKE, Aude (Elsevier, 2020)
    Motivated by the different uniaxial responses of two actual materials filled with either sifted glass beads or sifted glass grits, the influence of the fillers shape on the finite strain behavior of highly filled composites ...
  • Use of a micromechanical approach to understand the mechanical behavior of solid propellants 
    Article dans une revue avec comité de lecture
    DE FRANCQUEVILLE, Foucault; DIANI, Julie; GILORMINI, Pierre; VANDENBROUCKE, Aude (Elsevier, 2021)
    The development of new generations of propellants with better energetic properties may be hampered by unsatisfactory mechanical behaviors in terms of strength and toughness. A micromechanical approach is adopted to provide ...
  • Representative volume elements for the simulation of isotropic composites highly lled with monosized spheres 
    Article dans une revue avec comité de lecture
    FOUCAULT DE FRANCQUEVILLE; GILORMINI, Pierre; DIANI, Julie (Elsevier, 2019)
    A method is proposed for generating reliable representative volume elements (RVEs) that allows reducing the statistical analysis required for the simulation of the mechanical behavior of isotropic composites highly filled ...
  • 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 ...

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