Beschreibung:
A series of numerical experiments are conducted by the Elasto-Plastic CA model, whichwas successfully used to simulate the rock failure process under uniaxial compression in previouswork by the authors, to obtain the failure processes of heterogeneous rocks as well as the stress-strainrelation and strain-AE relation under tensile loading at meso level. The model can consider theheterogeneity of the materials conveniently, and has the advantages of localization, parallelizationetc. By constructing some local simple rules, the model can perfectly simulate the self-organizationprocess of rock failure process. In this paper, the domain is discretized into the system composed ofcell elements which are assumed to conform to the constitutive laws of elasto-brittle-plasticity. TheWeibull’s stochastic distribution is introduced to represent the heterogeneity of rock materials, andMohr-Columb criterion with tension cut-off is considered as the yield criterion. The process of crackinitiation, propagation and coalescence is well simulated and the results obtained reproduce the mainfeatures known of rock behavior, both at meso and overall stress-strain levels.