On the homogenised characteristics of a cylindrical bar with double periodicity under torsion load

摘要

The main purpose of this paper is to present a parametric study of homogenised coefficients and equivalent torsion rigidity of a cylindrical bar with double periodicity. Assuming an infinitely long cylinder, it is sufficient to analyse the cross section E, which exhibits a periodical distribution of porous zones ∑_p. At a finer scale, the latter also presents a periodicity. The theoretical results of the homogenisation procedure are stated more explicitly than in Taghite et al. The parametric analysis is preceded by a brief presentation of the adopted numerical procedure.