“…The present paper deals with the calculation of the mechanical effect of this second type of cracks. An abundant literature is devoted to the modeling of a medium with pervasive micro-cracks considering various characteristics of the latter, whether they are open or closed non-frictional (Kachanov, 1992(Kachanov, , 1993Leblond, 2000;Dormieux et al, 2006), frictional (Leguillon and Sanchez-Palencia, 1982;Andrieux et al, 1986), dilatant (Barthélémy et al, 2003;Marmier et al, 2007), propagating Gambarotta and Lagomarsino, 1993;Barthélémy, 2005;Zhu et al, 2007), dry or fluid filled or combining several characteristics in the cited papers and many others.…”