Coupling of elasticity to capillarity in soft aerated materials - Archive ouverte HAL
Article Dans Une Revue Soft Matter Année : 2014

Coupling of elasticity to capillarity in soft aerated materials

Lucie Ducloué
Olivier Pitois
Julie Goyon
Xavier Chateau
Guillaume Ovarlez

Résumé

We study the elastic properties of soft solids containing air bubbles. Contrary to standard porous materials, the softness of the matrix allows for a coupling of the matrix elasticity to surface tension forces acting on the bubble surface. Thanks to appropriate experiments on model systems, we demonstrate how the elastic response of the soft porous solid is governed by two dimensionless parameters: the gas volume fraction and a capillary number comparing the elasticity of the matrix with the stiffness of the bubbles. Furthermore, we show that our experimental results are accurately predicted by computations of the shear modulus through a micro-mechanical approach.
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Dates et versions

hal-01189028 , version 1 (01-09-2015)

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Lucie Ducloué, Olivier Pitois, Julie Goyon, Xavier Chateau, Guillaume Ovarlez. Coupling of elasticity to capillarity in soft aerated materials. Soft Matter, 2014, 10 (28), pp.5093. ⟨10.1039/c4sm00200h⟩. ⟨hal-01189028⟩
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