Hybrid Finite-Discrete Element Modelling of Dynamic Fracture of Rocks with Various Geometries

Abstract:

The hybrid finite-discrete element method Y-2D/3D IDE is applied to model the dynamic fracture of rock specimens with various geometries during impacting a fixed rigid surface. It is found that the modelled primary fractures are highly dependent on the rock geometry determining the weakest plane for a given impact, which agrees well with others' experimental and SPH numerical results. Compared with others' SPH results, Y-2D/3D IDE better simulates the actinomorphic pattern of primary fractures around the impact area and the secondary & tertiary fractures observed in the dynamic fracture experiments. It is concluded that the proposed Y-2D/3D IDE is a valuable tool to model rock dynamic fracture compared with FEM and DEM.

• Periodical: Applied Mechanics and Materials (Volumes 256-259)
• Pages: 183-186
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.256-259.183
• Online since: December 2012
• Authors: Hong Yuan Liu
• Keywords: Dynamic, FEM-DEM, Fracture, Modeling, Rock

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