Overview of the finite element capabilities of CalculiX
Version 2.23
Types of analysis
- static
- linear
- nonlinear
- geometric nonlinearities
- material nonlinearities
- frequency (linear)
- dynamic
- linear
- transient modal dynamics
- steady state dynamics
- harmonic periodic loading
- non-harmonic periodic loading
- nonlinear
- buckling
- heat transfer
- coupled thermomechanical analysis
- steady-state networks
- aerodynamic networks
- hydraulic pipe systems
- turbulent flow in open channels
- Laplace and Helmholtz problems by analogy
- Electrostatics
- Seepage flow
- Inviscid incompressible irrotional flow
- Lubrication
- Linear acoustics
- Shallow water waves
- Diffusion mass transfer in a stationary medium
- Computational fluid dynamics (stationary and instationary)
- Laminar and turbulent incompressible flow (liquids)
- Laminar and turbulent compressible flow (gases)
- Electromagnetic calculations
- Magnetostatics
- Inductive heating
- Sensitivity calculations
- Coordinates as design variables
- Material orientations as design variables
- Robust Design
- Generate a space of basis functions for the stochastic evaluation of
geometric tolerances
- Green function calculations
Materials
- linear elastic (isotropic, orthotropic or fully anisotropic)
- isotropic hyperelastic (compressible as well as nearly incompressible)
- deformation plasticity (Ramberg-Osgood)
- large deformation incremental isotropic (visco)plasticity with isotropic
and kinematic hardening
- large deformation creep for isotropic materials
- fiber reinforced anisotropic hyperelastic materials (e.g. arteries)
- small deformation isotropic viscoplastic theory for elastically
isotropic materials
- small deformation isotropic viscoplastic theory for elastically
anisotropic materials
- small deformation anisotropic viscoplastic theory for single crystals
- compression-only or tension-only materials
- user defined material
Elements
- 8-node brick element (full or reduced integration)
- 20-node brick element (full or reduced integration)
- 20-node incompressible element
- 4-node tetrahedral element
- 10-node tetrahedral element
- 6-node wedge element
- 15-node wedge element
- 3-node, 4-node and 6-node plane strain element
- 8-node plane strain element (full or reduced integration)
- 3-node, 4-node and 6-node plane stress element
- 8-node plane stress element (full or reduced integration)
- 3-node, 4-node and 6-node axisymmetric element
- 8-node axisymmetric element (full or reduced integration)
- 3-node, 4-node and 6-node shell and membrane element
- 8-node shell and membrane element (full or reduced integration)
- 3-node beam and truss element (full or reduced integration)
- 3-node fluid element (for forced convection)
- 4-node, 5-node, 7-node and 9-node contact spring elements
- 2-node gap element
- 2-node linear and nonlinear springs
- 2-node linear dashpots
- 2-node beam and truss element
- 1-node mass element
- composite shell elements consisting of an arbitrary amount of layers
(8-nodes and 6-noded)
- user-defined elements, such as:
- Timoshenko beam user element
- 3-node shell user element
Loading
- concentrated forces
- distributed pressure
- centrifugal loading
- gravity loading with know gravity vector
- generalized gravity loading
- volumetric loading
- temperature loading
- residual stress
- concentrated flux
- distributed flux
- prescribed convection conditions and forced convection
- prescribed radiation conditions and cavity radiation
Boundary conditions
- single point constraints
- linear multiple point constraints
- cyclic symmetry conditions
- tied contact
- node-to-face penalty contact (small and large sliding) for static,
dynamic and modal dynamic calculations
- face-to-face penalty contact (small sliding) for static and dynamic calculations
Kinematic behavior
- Rigid body motion
- Nodes on a straight line defined by movable nodes
- Nodes in a plane defined by movable nodes
- Application of a mean rotation to a set of nodes
- Kinematic coupling
- Distributing coupling
- Pre-tension
Coordinate systems
- global Cartesian system
- local Cartesian system
- local cylindrical system
Linear equation solvers
- interface for the direct sparse matrix solver SPOOLES
- interface for the direct sparse matrix solver TAUCS
- interface for the direct sparse matrix solver of the SGI scientific library
- interface for the direct sparse matrix solver PARDISO
- iterative solver (with diagonal scaling or Cholesky preconditioning)
- interface for the direct sparse matrix solver PaStiX
Quality measures
- two different error estimators
- result-dependent automatic tetrahedral remeshing
Output options
- Displacements
- Velocity
- Stress
- Section forces for beams
- Strain
- Forces (including sum over sets)
- Temperature (static)
- Equivalent plastic strain
- Energy density (including sum over sets)
- Internal variables
- Heat flux
- Heat sources
- Volume (including sum over sets)
- Static pressure (for CFD and liquid networks)
- Total pressure (for CFD and gas networks)
- Mass flow (for networks)
- Total temperature (for CFD and networks)
- Pressure coefficient (for CFD)
- Mach number (for CFD)
- Fluid depth (for fluid channels)
- Critical depth (for fluid channels)
- Electric potential and electric current density (for electromagnetic
calculations)
- Electric and magnetic field (for electromagnetic calculations)
- Section forces, section moments, section heat flux.
- Turbulent quantities (y+, nu_T, k, omega.. for CFD)
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