Calibration of Micromechanical Parameters to Reproduce a Frictional Cohesive Continuum by the Distinct Element Method
نویسنده
چکیده
A new contact bond model based on the Mohr-Coulomb failure criterion has been implemented in PFC2D to reproduce the behaviour of frictional cohesive (c, φ) geomaterials. According to this model, the bond strength can be clearly divided into two distinct micromechanical contributions: an intergranular friction angle and a cohesive bond force. A parametric analysis has been run to validate the proposed model and to calibrate the micromechanical parameters. Simple relationships between the macromechanical strength parameters (c, φ) and the corresponding micromechanical quantities have been obtained so that they can be used to model geotechnical boundary value problems with the DEM without need of further calibration.
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