New Functionality in Version 4.3
- Support for load cases:
- Loads and constraints can act conditionally in models using load groups and constraint groups, which you can include in load cases using various combinations of the defined groups.
- Use load groups for loads and other Neumann conditions. The loads can be scaled in the load cases using a scalar weight.
- Use constraint groups for constraints and other Dirichlet conditions.
- Available for the Solid Mechanics, Shell, Beam, Truss, and Plate interfaces.
- A new Membrane interface for modeling, for example, prestressed membranes, cladding on solids, and inflatable flexible bags (balloons). The Membrane interface can be seen as a representation of plane stress in a 3D geometry or as a shell without bending stiffness.
- New and redesigned periodic boundary conditions for solid mechanics and piezoelectric applications, including the following new types of periodic boundary conditions:
- General Floquet periodicity conditions.
- Cyclic symmetry condition for sector periodicity and dynamic cyclic symmetry.
- Also, an option to prescribe the periodic conditions on the entire displacement vector has been added (it is the new default option).
- Low-reflecting boundary condition, mainly intended for letting waves pass out from the model without reflection in time-dependent analysis. As a default, it takes material data from the domain in an attempt to create a perfect impedance match for both pressure waves and shear waves.
- Rigid connector improvements:
- Rigid connectors between shell edges are now available.
- Rigid connectors from shell and solid interfaces can be attached to each other.
- Linear buckling is now available for the Truss interface.
- The Prestressed Analysis, Frequency Domain study type is now supported also by the Truss interface.
- The rate of strain (
Ld) and spin (
Lw) tensors are now available as predefined variables (on the spatial frame) in the solid interfaces.
- Strain energy density is now computed as a result also in the Truss, Beam, Shell, and Plate interfaces.
- Shell curvature data is now available as variables, which you can use to modify material, thickness, or initial stress for deep drawn sheets.
- Gauss point results are now available for almost all stress results in Structural Mechanics, and all Gauss point results have been moved to separate groups in the plot list.
- The use of geometric nonlinearity is now controlled by a setting in the study step also for the Shell and Truss interfaces.
- Sliding Wedge: This model is a friction benchmark.
- Snap Hook Penalty: Model that shows an alternative simplified contact formulation.
- Truss Tower Buckling: A linear buckling example using the Truss interface.
- Vibrating Membrane: A verification example using the Membrane interface.
- Nonlinear Magnetostriction
- Turbine Stator
Backward Compatibility vs. 4.2a
- The nonlinear structural mechanics functionality is version 4.2a is now available in the Nonlinear Structural Materials Module, which is an add-on to the Structural Mechanics Module. See . This applies to hyperelastic and elastoplastic materials, which are now available in the Nonlinear Structural Materials Module.
- There is now a single redesigned Prescribed Rotation node for shells and plates that works with both linear and geometrically nonlinear material.
Backward Compatibility vs. Version 3.5a
Version 4 represents the out-of-plane strain as a separate degree of freedom. Plane stress models made with version 3.5a need to be re-solved to correctly display strains and stresses. Displacements are correctly displayed.