A FRACTURE SIMULATION USING 3-D MODE DISTINCT ELEMENT METHOD (3MDEM) WITH ELASTOPLASTIC CONSTITUTIVE MODEL

3-D mode distinct element method (3MDEM) is a distinct element method under the assumption of small strain, finite displacement and finite rotation for blocks. The deformation of blocks is expressed as a combination of deformation modes in 3MDEM. In this paper, simulation from continuum to discontinuum including elastic-plastic-fracture is presented on 3MDEM platform. Due to the shortcoming of common criterion for contact fracture, a new criterion based on plastic strain is introduced, which is verified by two numerical examples. At last, a cantilever beam is studied from elastic to elastoplastic stage, and further to discontinuous fracture stage.