Dynamics of solids with microperiodic nonconnected fluid inclusions

Francesco Dell'Isola (1, 2) , Luigi Rosa (3) , Cz. Wozniak (4)

1 Dipartimento di Ingegneria Strutturale e Geotecnica
2 Laboratorio Strutture e Materiali Intelligenti - Fondazione Tullio Levi-Civita
3 Dipartimento di Scienze Fisiche [Naples]
4 Centre of Mechanics

A new model for the description of micro- and macro-dynamics of linear elastic solid body with micro-periodic nonconnected fluid filled inclusions is proposed. Using the model we are able to account for the microstructural length-scale effect on the global dynamic behavior of the body. The effect falls out of the scope of the known homogenized models obtained by asymptotic approaches. The general equations obtained in the model proposed here are applied in order to investigate dispersion phenomena in wave propagation problems. The obtained results are compared with those for the asymptotic model when the length-scale effect vanishes. It is shown that this effect plays an important role in the analysis of dynamic problems.

Domaines: Mécanique [physics.med-ph]

Francesco Dell'Isola, Luigi Rosa, Cz. Wozniak. Dynamics of solids with microperiodic nonconnected fluid inclusions. Archive of Applied Mechanics, 1997, pp.14. ⟨hal-00508738⟩