Article ID Journal Published Year Pages File Type
824596 Comptes Rendus Mécanique 2006 6 Pages PDF
Abstract

RésuméOn estime le module équivalent de rigidité à la torsion pour un cylindre dont la section multiconnexe présente une double porosité irrégulière. On met en évidence les complications du modèle générées par le contraste d'échelles entre les zones poreuses et compactes. Pour citer cet article : M'B. Taghite et al., C. R. Mecanique 334 (2006).

The objective of the present Note is to estimate the equivalent torsion rigidity modulus for a cylinder whose cross-section Σ exhibits a periodical distribution of porous zones ΣP. Taking into account a second, finer, periodical distribution of pores in ΣP, we have to use the homogenization method in a biperiodical context. However, the contrast of scales at the interfaces between ΣP and the compact part ΣC of Σ, requires some subtle fitting up of this method. Finally, we point out the existence of boundary layers around the interfaces ∂ΣP and we estimate the weakening of the torque rigidness. To cite this article: M'B. Taghite et al., C. R. Mecanique 334 (2006).

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