On the quasi-static effective behaviour of poroelastic media containing elastic inclusions

Pascale Royer (1) , Pierre Recho (2) , Claude Verdier (2)

1 BIOTIC - Biomécanique des Interactions et de l'Organisation des Tissus et des Cellules
2 LIPhy - Laboratoire Interdisciplinaire de Physique [Saint Martin d’Hères]

The aim of the present study is to derive the effective quasi-static behaviour of a composite medium, made of a poroelastic matrix containing elastic impervious inclusions. For this purpose, the asymptotic homogeni-sation method is used. On the local scale, the governing equations include Biot's model of poroelasticity in the porous matrix and Navier equations in the inclusions, with elastic properties of the same order of magnitude. Biot's diphasic model of poroelasticity is obtained on the macroscopic scale, but with effective parameters that are strongly impacted by the distribution of inclusions, even at low volume fraction. The impact on fluid flow is strictly geometrical, showing that the inclusions do not play the role of a porous network.

Domaines: Mécanique des fluides [physics.class-ph]; Mécanique des solides [physics.class-ph]

Pascale Royer, Pierre Recho, Claude Verdier. On the quasi-static effective behaviour of poroelastic media containing elastic inclusions. Mechanics Research Communications, 2019, 96, pp.19-23. ⟨10.1016/j.mechrescom.2019.02.004⟩. ⟨hal-01930338v2⟩