General System Facilities
- Online help
- Comprehensive error diagnostics
- User defined element and nodal output options
- Full range of load types
- General purpose load curve input
- Generalised constraint equations
- Resolution for multiple load cases
- Flexible restart facility
- Superelements (substructures)
- Efficient automatic frontwidth optimisation
- Efficient frontal equation solver for both large and small problems
- Pre-conditioned conjugate gradient iterative solver for fast solutions of large problems
Verification
- Rigorous internal Quality Assurance procedures
- Comprehensive machine checked testing
- HECB calibration and NAFEMS calibration tests
Implicit Stress Element Types
- Plane frame/truss
- Grillage
- Space frame/truss
- Curved thin and thick beams with constant/variable cross sections
- Plane stress/plane strain
- Plate flexure (thin and thick)
- Ribbed plates
- Axisymmetric solids with non axisymmetric loading
- Axisymmetric membranes
- Axisymmetric thin shell
- Flat thin shells
- Curved thin Semiloof shells
- Flat/curved thin/thick co-rotational shells
- 3D solids
- Composite shell
- Composite solids
- Generalised joint/gaps
- 2D plane stress/plane strain/ axisymmetric solid crack tip
- Pore water pressure modelling (Plane strain only)
Explicit Stress Element Types
- Plane stress/strain with hourglass stabilisation
- Solid with hour glass stabilisation
Thermal(Field) Element Types
- Bars
- Plane
- Axisymmetric solids
- Axisymmetric membranes
- 3D solids
- Links
Solvers
- Frontal (direct) solver
- Iterative (PCG) solver
- Fast multifrontal direct solver
- Fast multifrontal block Lanczos eigensolver
- Fast complex eigensolver
Linear Materials
- Isotropic, orthotropic, anisotropic and rigidity models
- Isotropic and orthotropic thermal materials
- Composite lay-ups for shell and solid material models
- Temperature dependency for all linear material models
Nonlinear Materials
- Plasticity model with isotropic and kinematic hardening using von-Mises criteria, includes a backward Euler stress update algorithm with consistent tangents
- Anisotropic plasticity model with isotropic hardening using Hill or Hoffman criteria, includes a backward Euler stress update algorithm with consistent tangent
- Plasticity model with isotropic hardening using a modified von Mises criteria with different properties in tension and compression, includes a backward Euler stress update algorithm with consistent tangent
- Concrete models with opening and closing cracks and strain softening based on fracture energy in 2D and 3D
- Concrete creep and shrinkage model to CEB-FIP Model Code 1990
- Multi-surface cracking concrete with crushing material model
- Viscous damped joints
- Geotechnical model using Mohr Coulomb criteria including non-associative flow for soils and rocks
- Volumetric deformation model for soils and crushable foams
- Ogden and Mooney-Rivlin models for rubber materials with very large strains
- Composite lay-ups for shell and solid nonlinear material models
- Temperature dependency for all nonlinear material models
- Creep model with time dependency and strain hardening
- Viscoelasticity
- Phase changes
- User defined nonlinear material and creep interfaces
- Damage model
- Hashin material model for composite materials
- Material model interface (MMI)
Eigen Analysis
- Lanczos and Subspace EigenSolver
- Frequency bracketing
- Euler buckling analysis
- Guyan reduction with automatic or user defined masters
Nonlinear Analysis
- Incremental solutions with iterative correction
- User defined combination of full or modified Newton Raphson iterations with line searches
- Automatic arc length solution procedures with option for non-proportional loading
- Automatic recovery upon convergence failure
- Load or displacement control
- Wide selection of convergence criteria
- Large deformation, large rotation geometric nonlinearities
- Large strains
- Follower loads
- Element birth and death facility
- Centripetal stress stiffening
- Temperature dependent material properties
Dynamic Analysis
- Forced response analysis
- Modal (viscous or structural) or Rayleigh damping
- Response spectrum analysis with a choice of SRSS and CQC spectral combinations
- Modal synthesis analysis using superelements
- Implicit transient dynamic analysis using Hilber-Hughes-Taylor time integration scheme
- Explicit transient dynamic analysis using central difference time integration scheme
- Initial velocity/acceleration input
- Implicit and explicit impact
- Linear and nonlinear dynamic analysis
- Automatic time step selection
- Time dependent material properties
- Time dependent loading
- Interactive Model Dynamics option for multiple loading events and advanced loading options
Thermal Analysis
- Steady state heat conduction/convection/radiation
- Transient thermal analysis with a general two point recurrence scheme
- Temperature dependent thermal properties
- Temperature dependent nonlinear heat conduction/convection/radiation
- Variable time step selection
- Conduction/convection/gap radiation
- Diffuse radiation using view factor with option to account for symmetry boundary conditions
- Full and semi thermal-structural coupling
Boundary Conditions
- Choice of restrained, prescribed or spring boundary conditions
- Transformed freedom option for skew boundary conditions
- Time dependent boundary conditions and loading
- Nonlinear friction and gap models to represent deformation dependent boundary conditions and contact problems
- Slideline/slidesurface contact algorithms for use with implicit/explicit plane stress/strain, Axisymmetric, shell and solid elements
- Convection and nonlinear radiation boundary conditions
- Tied slidelines to connect incompatible meshes
- Contact cushioning
- Automatic pre-contact algorithm
- Curved surface contact
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