A non-local model with tension and compression damage mechanisms

A non-local isotropic damage model is proposed which can be used to predict the behaviour of rock-like materials up to failure. Two isotropic damage v ariables account for the progressive degradation of mechanical properties u nder stress states of prevailing tension and compression and two internal l engths, one for tension and the other for compression, are introduced as lo calisation limiters. A linear bifurcation analysis highlights the regularis ation properties of the non-local model. An iterative scheme for the numeri cal solution of the finite-step problem consisting of a linear global predi ctor, an averaging phase and a non-linear local corrector is presented. Som e illustrative examples of tension and splitting tests show the effectivene ss of the proposed model. (C) 2001 Editions scientifiques et medicales Else vier SAS.