Rimantas Kacianauskas

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The paper describes the development and performance of parallel algorithms for the discrete element method (DEM) software. Spatial domain decomposition strategy and message passing inter-processor communication have been implemented in the DEMMAT code for simulation of visco-elastic frictional granular media. The novel algorithm combining link-cells for(More)
In the present study, CPT is modelled by static elasto-plastic small strain finite element method (FEM) analysis of axi-symmetric problem. Undrained soil properties and Tresca yield criterion is used for determining cone resistance of clay. Sand is modelled by using drained soil properties and Mohr-Coulomb yield criterion. Cone penetration problem is(More)
The discrete concept and numerical discrete element method (DEM) are applied for simulation of filling and discharge of granular material in a wedge-shape hopper with fixed outlet orifice making the base for optimization of discharge flow parameters. The presented DEM model was validated by examination of the wall pressure and by comparing it with the(More)
The Discrete Element Method (DEM) recently presents numerical tool widely used in simulation of heterogeneous solids. The method captures dynamic behaviour of solid by considering motion and interaction of material particles. The most computationally expensive procedure of the DEM is search of contacts for particles, therewith each pair of colliding(More)
The discrete element method (DEM) became recognized as a numerical tool for simulating granular material when the work by Cundall and Strack [1] was published. Representation of the particle shape is one of the key issues of DEM simulations. Diversity of real particle shapes requires, however, the development of more sophisticated particle models beyond the(More)