... of a Rock Block In DDA, time steps are used to drive the computation. Large displacement and large deformation result from the accumulation of small displacements and small deformations within the individual time steps. Given that each time step satisfies the condition of infinitesimal displacement...

... hydraulic fracturing finite element method dispersion tripoly concentration procedure time step fracture diffusion equation eulerian grid Rock Mechamcs, Auberttn, Hassam & M tn (eds) ¸ 1996 Balkema, Rotterdam. ISBN 90 5410 838 X A new Lagrangian-Eulerian finite element method for modeling...

... engineering granular media discontinuous deformation analysis University calculation contact position inertia matrix DDA displacement time step gravity matrix reservoir simulation particle Computation stress distribution mechanics Rock Mechanics, Auberttn, Hassam &Mitn (eds) ¸ 1996 Balkema...

... fracture pattern. hydraulic fracturing Rock mechanics equation of state propagate time step numerical simulation delay time fracture initiation dynamic lattice network model fracture mechanics fluid modeling Simulation detonation experiment fracture propagation propagation Upstream...

... at each time step. Within each time step, the displacements of all 'points are small, hence the displacements can be reasonably represented by first order approximations. By adopting such approximations, the DDA method assumes that each block has constant stresses and strains throughout. The displacements...

... deformation analysis Wellbore Design time step simplex integration rock mass equation equilibrium Computation tetrahedron formulae integration physical law VPoP rock failure computation modeling dynamic rock failure Rock Mechanics, Nelson & Laubach (eds) © 1994 Ba/kema, Rotterdam, ISBN 90...

... the DDA evaluations are compared with those calculated using the Reinforced Rock Arch (RRA) method. displacement rock bolt length tensile force tunnel rock reinforcement dda graphic output application time step stability discontinuous deformation analysis case nil rock bolt tensile force...