Energy Absorption Capacity of Agglomerated Cork Under Severe Loading Conditions: Influence of Temperature and Strain Rate
| Autor: | Jean-Benoît Kopp, L. Le Barbenchon, Jérémie Girardot, Philippe Viot |
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| Přispěvatelé: | Institut de Mécanique et d'Ingénierie (I2M), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Polymeric foam
Materials science Materials Science (miscellaneous) 02 engineering and technology Dynamic loadings Stress (mechanics) 0203 mechanical engineering medicine Composite material Cork agglomerate Microstructure Strain (chemistry) Temperature Stiffness Strain rate [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph] 021001 nanoscience & nanotechnology Non-linear mechanical behavior 020303 mechanical engineering & transports Mechanics of Materials Solid mechanics Cellular material Energy absorption medicine.symptom 0210 nano-technology Glass transition Agglomerated cork |
| Zdroj: | Journal of Dynamic Behavior of Materials Journal of Dynamic Behavior of Materials, Springer Verlag, 2021, ⟨10.1007/s40870-021-00316-5⟩ |
| ISSN: | 2199-7446 |
| DOI: | 10.1007/s40870-021-00316-5⟩ |
| Popis: | 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 T $$_g$$ 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. |
| Databáze: | OpenAIRE |
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