PAK-S
Package for Structural Analysis
Linear Analysis: statics, dynamics, frequency analysis
Nonlinear Incremental Analysis: statics, dynamics
- Class of Problems: Small displacements with nonlinear materials (MNO), stability analysis, postcritical structural response, nonlinear dynamics, contact and impact problems with all kinds of nonlinearities, large displacements with small strains, large strains
- Iterative Methods in Nonlinear Analysis: Modified Newton with Aitken acceleration, BFGS (with line search), full Newton with or without line search, automatic force and displacement control (arc-length method)
- Finite Elements: Truss (with gap option and with prescribed material nonlinearity), 2D and 3D with enhancements, membrane, shell (with mixed interpolations and membrane enhancements), beam, thin-walled beam, beam with arbitrary and deformable cross-section (beam superelement), beam with plastic hinge, rigid body elements
- Material Models: Linear elastic, thermo-elastic, orthotropic elastic and thermo-elastic; rubber; Mises elastic-plastic (isotropic and anisotropic) with mixed hardening, Mises thermo-elastic-plastic isotropic and anisotropic, with mixed hardening with or without creep; Cam-clay with critical stress state, generalized cap soil mechanics model, bounding surface Cam-clay model, viscoplastic models for metals and soils
- Loading and Boundary Conditions: Concentrated and distributed loadings, prescribed displacements, skew coordinate systems, given constraints between displacements
