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Article Dans Une Revue Polymer Testing Année : 2023

Fatigue mechanisms of a closed cell elastomeric foam: A mechanical and microstructural study using ex situ X-ray microtomography

Résumé

The degradation of mechanical properties of closed-cell elastomeric foams in fatigue and its link with the cellular structure is still poorly understood. To clarify this, we performed interrupted and continuous cyclic compression tests on EVA closed-cell foams used in running shoes. The 3D cellular structures of tested samples was analyzed before, during and after fatigue tests using X-ray microtomography and digital volume correlation. Interrupting the cycling allows the observation of the cell flattening along the compression axis with both plastic bending and an increase of tears/holes of cell walls. These two fatigue-induced defects are suspected to play a strong contribution on the fatigue properties of the foam at the sample scale and may explain the partial recovery of the initial mechanical property of foams while restarting cycling.
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Dates et versions

hal-04217717 , version 1 (26-09-2023)

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Citer

C. Aimar, L. Orgéas, S. Rolland Du Roscoat, Lucie Bailly, D. Ferré Sentis. Fatigue mechanisms of a closed cell elastomeric foam: A mechanical and microstructural study using ex situ X-ray microtomography. Polymer Testing, 2023, 128, pp.108194. ⟨10.1016/j.polymertesting.2023.108194⟩. ⟨hal-04217717⟩

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