FEM ElementGeometry2D
Appearance
|
|
| Menu location |
|---|
| Model → Element Geometry → Shell Plate Thickness |
| Workbenches |
| FEM |
| Default shortcut |
| C S |
| Introduced in version |
| - |
| See also |
| FEM tutorial |
| Solvers |
|---|
| All |
Description[edit | edit source]
ElementGeometry2D is used to define the thickness of 2D (shell and introduced in 1.0: plane stress/strain) FEM elements, all or lying on the chosen surface. It has to be defined also for axisymmetric models, even though the thickness value is irrelevant in such a case.
2D mesh (on the left) and its expansion to solid elements done internally by CalculiX based on the specified thickness (on the right)
Usage[edit | edit source]
- There are several ways to invoke the command:
- Press the
Shell Plate Thickness button.
- Select the Model → Element Geometry →
Shell Plate Thickness option from the menu.
- Press the
- Specify the shell thickness.
- Optionally press the Add button in the task panel and then click on the face you want to have a prescribed thickness. If the face selection is empty, all the remaining faces (whose thickness is not defined by other FEM ElementGeometry2D objects) will be automatically assigned. introduced in 1.1: To remove faces from the selection, press the Remove button.
Limitations[edit | edit source]
- Currently, analyses combining shell elements with solid or edge (beam) elements are not supported.
Properties[edit | edit source]
- DataThickness: Specifies the thickness of the 2D elements.
- DataOffset - introduced in 1.1: Specifies offset of the shell mid-surface with respect to the meshed geometry. The unit is the shell thickness. Positive values indicate offset in the positive normal direction, negative values indicate offset in the opposite direction. Zero means no offset (mid-surface located on the meshed geometrical surface). For example, 0.5 means that the meshed geometrical surface will be the top surface of the expanded shell while -0.5 means that it will be the bottom surface.
Notes[edit | edit source]
- For viewing results from CalculiX solver on the mesh expanded to the prescribed thickness, the property
Beam Shell Result Output 3Din the FEM SolverCalculixCcxtools needs to be set toTrue. To just visualize the defined thicknesses before running actual calculations, one may run a check type analysis with this property set toTrue. - This feature uses the *SHELL SECTION card in CalculiX for shell elements and *SOLID SECTION card for plane stress/strain and axisymmetric elements.
- Materials: Solid Material, Fluid Material, Non-Linear Mechanical Material, Reinforced Material (Concrete); Material Editor
- Element Geometry: Beam Cross Section, Beam Rotation, Shell Plate Thickness, Fluid Section for 1D Flow
- Electromagnetic Boundary Conditions: Electrostatic Potential Boundary Condition, Current Density Boundary Condition, Magnetization Boundary Condition, Electric Charge Density
- Fluid Boundary Conditions: Initial Flow Velocity Condition, Initial Pressure Condition, Flow Velocity Boundary Condition
- Geometrical Analysis Features: Plane Multi-Point Constraint, Section Print Feature, Local Coordinate System
- Mechanical Boundary Conditions and Loads: Fixed Boundary Condition, Rigid Body Constraint, Displacement Boundary Condition, Contact Constraint, Tie Constraint, Spring Boundary Condition, Force Load, Pressure Load, Centrifugal Load, Gravity Load
- Thermal Boundary Conditions and Loads: Initial Temperature, Heat Flux Load, Temperature Boundary Condition, Body Heat Source
- Overwrite Constants: Constant Vacuum Permittivity
- Mesh: Mesh From Shape by Netgen, Mesh From Shape by Gmsh, Mesh Boundary Layer, Mesh Refinement, Mesh Group, Erase Elements, FEM Mesh to Mesh
- Solve: Solver CalculiX, Solver Elmer, Solver Mystran, Solver Z88; Mechanical Equations: Elasticity Equation, Deformation Equation; Electromagnetic Equations: Electrostatic Equation, Electricforce Equation, Magnetodynamic Equation, Magnetodynamic 2D Equation, Static Current Equation; Flow Equation, Flux Equation, Heat Equation, Solver Job Control, Run Solver
- Results: Purge Results, Show Result, Apply Changes to Pipeline, Post Pipeline From Result, Pipeline Branch, Warp Filter, Scalar Clip Filter, Function Cut Filter, Region Clip Filter, Contours Filter, Glyph Filter, Line Clip Filter, Stress Linearization Plot, Data at Point Clip Filter, Calculator Filter; Filter Functions: Plane, Sphere, Cylinder, Box; Data Visualizations: Create Lineplot, Create Histogram, Create Table
- Utilities: Clipping Plane on Face, Remove All Clipping Planes, FEM Examples; Clear FEM Mesh, Display Mesh Info
- Additional: Preferences; FEM Install, FEM Mesh, FEM Solver, FEM CalculiX, FEM Concrete; FEM Element Types
- Getting started
- Installation: Download, Windows, Linux, Mac, Additional components, Docker, AppImage, Ubuntu Snap
- Basics: About FreeCAD, Interface, Mouse navigation, Selection methods, Object name, Preferences, Workbenches, Document structure, Properties, Help FreeCAD, Donate
- Help: Tutorials, Video tutorials
- Workbenches: Std Base, Assembly, BIM, CAM, Draft, FEM, Inspection, Material, Mesh, OpenSCAD, Part, PartDesign, Points, Reverse Engineering, Robot, Sketcher, Spreadsheet, Surface, TechDraw, Test Framework
- Hubs: User hub, Power users hub, Developer hub