Description |
BEFE is a general purpose computer program for the static two and three-dimensional linear and nonlinear analysis of structures and solids using the Boundary Element (BEM) and/or the Finite Element (FEM) methods. It is particularly suited for problems in geomechanics and has special features for modelling joints and faults, sequential excavation and construction as well as for modelling elasto and visco-plastic material behavior. Problems can be discretised into either boundary elements, finite elements or a combination of both. Functions: Elastic and viscoplastic analysis of problems in structural mechanics using the finite element method (FEM), the boundary element method (BEM) or the coupled method. Three dimensional problems, plane stress and plane strain. Axisymetrical problems. Plates and shells, folded structures. The element library includes the following types of elements: Boundary elements with linear, quadratical or mixed shape function; Infinite boundary elements; Finite elements with linear, quadratical or mixed shape function; Shell and plate elements with quadratical or mixed shape function; Infinite finite elements; Truss elements; Joint elements; Types of loads: Point loads; Predefined displacement; Distributed loads; Self weight; Temperature; Centrifugal forces; Virgin stress; Simulation of a excavation/construction process. Material laws for plasticity: von Mises; Mohr Coulomb / Tresca; Drucker Prager; Multi-laminate model for rock (up to 12 layers); Hoek-Brown; Steady-State creep. Limits: 10 000 elements total (FE+BE); 30 000 nodes; max. frontwidth = 6000 DOFs; in practice unlimited number of unknows; in practice unlimited number of load cases; 2 000 boundary elements/region; in practice unlimited number of boundary element regions. |