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Energy Absorption Capacity of Agglomerated Cork Under Severe Loading Conditions

Article dans une revue avec comité de lecture
Auteur
LE BARBENCHON, Louise
1002421 Institut de Mécanique et d'Ingénierie [I2M]
VIOT, Philippe
1002421 Institut de Mécanique et d'Ingénierie [I2M]
GIRARDOT, Jérémie
1002421 Institut de Mécanique et d'Ingénierie [I2M]
KOPP, Jean Benoit
1002421 Institut de Mécanique et d'Ingénierie [I2M]

URI
http://hdl.handle.net/10985/21418
DOI
10.1007/s40870-021-00316-5
Date
2021
Journal
Journal of Dynamic Behavior of Materials

Résumé

Understanding the mechanical behavior of materials in working conditions is a current problem in transport industries. In this article, we demonstrate why the temperature and the strain-rate are first-order parameters when studying the mechanical behavior of polymeric cellular materials with a glass transition temperature Tg in working temperatures. Compressive tests in quasi-static until a 0.5 hencky strain were conducted at several temperatures on agglomerated cork. Compressive tests were then conduted along a large range of strain rates, from 4.2 10−5 s−1 to 250 s−1 at room temperature (24 °C). Both parameters influence strongly the overall mechanical behavior with an opposite effect because of the polymeric nature of the constitutive materials. However discrepencies in the variation were observed between materials parameters of the two conditions (temperature and strain rate). In order to separate the dynamic effects from the modification of the stiffness of the constitutive materials with temperature or strain rate, a specific apparatus was designed to achieve high-strain rate tests in temperature. Compressive tests in dynamic regime were then conducted at −20 °C on agglomerated cork as a proof-of-concept. The experimental results (stress/strain curves and materials parameters) showed a great influence of the strain-rate and the temperature combined. Such apparatus will provide results allowing a more in-depth characterisation of the local mechanisms that will be precious for future simulations.

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Fin d'embargo:
2022-02-01
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  • Institut de Mécanique et d’Ingénierie de Bordeaux (I2M)

Documents liés

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

  • Multi-scale foam : 3D structure/compressive behaviour relationship of agglomerated cork 
    Article dans une revue avec comité de lecture
    LE BARBENCHON, Louise; GIRARDOT, Jérémie; KOPP, Jean-Benoit; VIOT, Philippe (Elsevier, 2019)
    This study focuses on the microstructural aspects of a cork-based by-product known as agglomerated cork and its influence on the compressive mechanical behaviour. The material consists in granulates of a natural polymeric ...
  • Reinforcement of cellular materials with short fibres: Application to a bio-based cork multi-scale foam 
    Article dans une revue avec comité de lecture
    LE BARBENCHON, Louise; KOPP, Jean-Benoit; GIRARDOT, Jérémie; VIOT, Philippe (Elsevier, 2020)
    A bio-sourced foam, agglomerated cork, was chosen to evaluate the influence of short fibres on the mechanical behaviour of cellular materials. The final material was obtained by mixing cork particles with a thermoset resin. ...
  • Study of the dynamic fracture of hollow spheres under compression using the Discrete Element Method 
    Article dans une revue avec comité de lecture
    CORE, Arthur; KOPP, Jean-Benoit; GIRARDOT, Jérémie; VIOT, Philippe (ESIS - Elsevier, 2018)
    Hollow sphere structure (HSS) belongs to cellular solids that have been studied recently for its multiples properties. In our case, HSS aims to absorb soft impacts energy on an airliner cockpit. This structure is investigated ...
  • Dynamic Fracture of a Semi-Crystalline Bio-Based Polymer Pipe: Effect of Temperature 
    Article dans une revue avec comité de lecture
    KOPP, Jean-Benoit; GIRARDOT, Jérémie (Scientific Research Publishing, Inc., 2021)
    The influence of temperature on the resistance to rapid crack propagation of a semi-crystalline bio-based polymer was studied. The experimental results described in this study allow to initiate a first discussion ...
  • Breaking pharmaceutical tablets with a hole: Reevaluation of the stress concentration factor and influence of the hole size 
    Article dans une revue avec comité de lecture
    CROQUELOIS, Benjamin; GIRARDOT, Jérémie; KOPP, Jean-Benoit; CAZAUTETS, Clément; TCHORELOFF, Pierre; MAZEL, Vincent (Elsevier, 2017)
    Mechanical strength is an important property for pharmaceutical tablets. Its study using the theory of linear elastic fracture mechanics has been introduced in the pharmaceutical field through the Brittle Fracture Index ...

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