Recap Exercise : Sweep 3D Solid Meshing Using Sweep 3D
Recap Exercise : Mesh Part Transformations Mesh Part Transformation
Recap Exercise : Mesh Part Extrusion Mesh Part Extrusion
Master Exercise
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Meshing of an Engine Cylinder Block Presentation Meshing of an Engine Cylinder Block : Step1 Meshing of an Engine Cylinder Block : Step2
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FEM Solid
OCTREE Tetrahedron Mesher
Student Notes:
Recap Exercise 15 min
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In this step you will : Create a solid mesh using OCTREE Tetrahedron Mesher Apply global and local specifications
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FEM Solid
Do It Yourself (1/6)
Student Notes:
Load : FMD_Piston.CATAnalysis
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Use OCTREE Solid Meshing Click on the OCTREE Tetrahedron Mesher icon Select the Part Body Add Global parameters Size : 9mm Absolute sag : 0.9 mm Element type : parabolic
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FEM Solid
Do It Yourself (2/6)
Student Notes:
Add OCTREE Solid Meshing – Local specifications Select “Local size” and click on “Add” Select a face on the side of the part Enter 2mm for value Click OK
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Select « Local sag » and « Add » Select a face on the side of the part Enter 0.5mm for value Click OK
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FEM Solid
Do It Yourself (3/6)
Student Notes:
Select “Edges distribution” and click “Add” Select an edge shown on the part Enter 36 for number of edges Click OK
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Select « Imposed points » and click « Add » Select the “Point.4” point Click OK
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FEM Solid
Do It Yourself (4/6)
Student Notes:
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Specify OCTREE Solid Meshing – Quality parameters Select the “Stretch” criteria Select Jacobian = 0.3 Warp value = 60
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FEM Solid Student Notes:
Do It Yourself (5/6)
Specify OCTREE Solid Meshing – Other parameters Geometry size limit = 0.1 mm Check Mesh edges suppression with value = 0.2 Uncheck Global interior size Min. size for sag specs = 1.252 mm Max. number of attempts = 3 Click « Apply » Once Mesh is visible click « OK »
Without Mesh edges suppression:
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With Mesh edges suppression:
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FEM Solid
Do It Yourself (6/6)
Student Notes:
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Mesh is generated . The Specifications are shown in the tree and on the mesh.
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FEM Solid
Solid Meshing Using Sweep 3D
Student Notes:
Recap Exercise 5 min
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In this step you will : Use the sweep 3D Mesher
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FEM Solid
Do It Yourself (1/2)
Student Notes:
Load: FMD_sweep3d_MeshedSurface.CATAnalysis Sweep 3D Solid Meshing Click on the sweep 3D icon Select the Part Body Select Top and Bottom faces in ‘Sweep Limits’ text fields
Select Angle = 60 in Angle field
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Click ‘Compute’ button to compute guides
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Guides are highlighted with yellow color
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FEM Solid
Do It Yourself (2/2)
Student Notes:
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Switch to Mesh Tab Select the Element Type as Linear Select ‘Distribution Type’ as ‘Uniform’ Enter Layer Numbers = 20
Click ‘Apply’ Button for preview Click ‘OK’ to confirm Hide the geometry to show only mesh
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FEM Solid
Mesh Part Transformation
Student Notes:
Recap Exercise 15 min
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In this step you will : Create a solid mesh from a surface mesh using Tetrahedron Filler Apply transformation tools to created solid mesh
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FEM Solid Student Notes:
Mesh Parts Transformation
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Gear tooth solid geometry and extracted surfaces
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Final mesh
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FEM Solid
Do It Yourself (1/3)
Student Notes:
Load: FMD_Engrenage.CATAnalysis Solid Meshing Initial surface meshes are already generated. The three surface meshes are closed in term of connectivity and there is no interference Click on the Tetrahedron Filler icon Select the three surface Mesh Parts Click on Apply Button and then click OK
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Deactivate surface meshes Select the three surface mesh parts in the tree By right click on them choose Deactivate
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FEM Solid
Do It Yourself (2/3)
Student Notes:
Use Rotation transformation. Select « Rotation Mesher » icon Select the tetrahedron filler mesh as mesh part Select the « Line.1 » feature for the axis. Put the geometry in « show » mode if the axis is hidden Define rotation angle through a formula In Angle field, display the contextual menu Choose Edit formula: this angle equals rotation Mesh.1 angle: `Nodes and Elements\Rotation Mesh.1\Angle`
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Connection between meshes: nodes condensation Select « Condensation with all meshes » Define numbers of copies In Number of copies field, display the contextual menu Choose Edit formula: 360deg/rotation Mesh.1 angle Click Apply Button
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FEM Solid
Do It Yourself (3/3)
Student Notes:
Click OK to generate the whole Gear
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Deactivate tetrahedron filler mesh
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FEM Solid
Mesh Part Extrusion
Student Notes:
Recap Exercise 15 min
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In this step you will create : Solid mesh using Extrusion by Translation Analyze Element Quality Solid mesh using Extrusion by Rotation Solid mesh using Extrusion by Symmetry Solid mesh using Extrusion along a Spline
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FEM Solid
Do It Yourself (1/5)
Student Notes:
Load: FMD_Extrusion.CATAnalysis
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Extrusion Tools – Extrusion by Translation Click on the Extrude Mesher with Translation icon Select the Advanced Surface Mesh.1 as mesh part input Select the axis as shown Enter Start = 0 mm and End = 200 mm for the length, Geometric as distribution type Enter 10 as layers number and 3 as size ratio Click Apply and then Click on OK
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FEM Solid
Do It Yourself (2/5)
Student Notes:
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Analyse Elements Quality Click on the Quality Analysis icon Check Nodes Jacobian, Gauss Jacobian, Distortion criteria Focus on Worst Elements if needed
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FEM Solid
Do It Yourself (3/5)
Student Notes:
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Extrusion tools – Extrusion by Rotation Click on the Extrude with Rotation icon Select the Advance Surface Mesh.1 as mesh part input Select the axis as shown Enter Start =0 deg and End = 180 deg for angle, enter 25 for the layers number Enter Distribution as Uniform Click Apply and then OK The 3D mesh is generated. Check Elements Quality
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FEM Solid
Do It Yourself (4/5)
Student Notes:
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Extrusion tools – Extrusion by Symmetry Click on the Extrude Mesher with Symmetry icon Select the Advanced surface Mesh.1 as mesh part input Select the plane as shown Enter 15 for the layers number Click Apply for preview and then click OK Check Elements Quality
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FEM Solid
Do It Yourself (5/5)
Student Notes:
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Extrusion tools – Extrusion along a spine Click on the Extrude Mesher along a spine icon Select the Advance surface Mesh.1 as mesh part input Select the spine as shown Enter Start = 0mm and End = 300mm for the length and 100 for the layers number Click Apply and then click OK Check Elements Quality
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FEM Solid
Master Exercise
Student Notes:
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Meshing of an Engine Cylinder Block Presentation Meshing of an Engine Cylinder Block : Step1 Meshing of an Engine Cylinder Block : Step2
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FEM Solid
Meshing of an Engine Cylinder Block
Student Notes:
Master Exercise Presentation 60 min
In this exercise you will mesh an engine block with FEM Solid tools. To do so, you will have to :
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Create surface meshes for the surfaces of engine block Create Solid Mesh from surface meshes using Tetrahedron Filler Analyze quality of mesh
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FEM Solid
Design Intent – Meshing of an Engine Cylinder Block
Student Notes:
You will learn how to create solid mesh for complex parts. Using surface mesh, it is possible to get required element shape and element distribution on desired areas of part. Then same surface mesh can be used to create solid mesh using tetrahedron filler. This will be carried out in following way. Creating regular triangular mesh with required distribution pattern in desired surfaces
Provide surface mesh for remaining surfaces and capture the previous mesh
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Use tetrahedron filler to create solid mesh
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FEM Solid Student Notes:
Meshing of an Engine Cylinder Block - Design Process 1 Generate Surface meshes
2 Check surface mesh 3 Use Tetrahedron Filler to create solid mesh
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Analyze Mesh for quality
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FEM Solid
Meshing of an Engine Cylinder Block
Student Notes:
Step 1 - Creating surface meshes 40 min
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In this step you will : Create surface mesh with quad element Split the mesh to form triangular mesh Boundary simplification Analyze the surface mesh
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FEM Solid
Do It Yourself (1/6)
Student Notes:
Load: FMD_Cylinder_Block.CATPart In order to use the Tetrahedron Filler Mesher, surface meshes have to be generated. See FEM Surface training for further details about it.
Make the “analysis” feature of the “cylinder block” part visible
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Enter the Advanced Meshing Tools workbench
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FEM Solid
Do It Yourself (2/6)
Student Notes:
Advance Surface Mesh Requires FMS License
Click on Advanced Surface Mesh icon Select the first analysis yellow face Quadrangle meshing method Mesh size 8.5mm Constraint sag 0.45mm Automatic Mesh Capture 0.5 mm
Select this surface
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Mesh and Exit
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FEM Solid
Do It Yourself (3/6)
Student Notes:
Repeat the process for the two other yellow analysis surfaces
Repeat the process for the two upper yellow analysis surfaces
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The resulting meshes look like this
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FEM Solid
Do It Yourself (4/6)
Student Notes:
Use split Quads for splitting into triangles Similarly use split quads for other four surfaces
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Mesh the remaining surfaces of the model Click on Advanced Surface Mesh icon Select the Part Body feature in the tree Triangle meshing method Mesh size : 8.5mm Absolute Mesh sag: 1.5mm, min size: 5mm Automatic Mesh capture, tolerance : 0.5mm Constraint sag : 0.45mm Merge during simplification: 0.1mm
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FEM Solid
Do It Yourself (5/6)
Student Notes:
Click on the Boundary simplifications icon
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In the Faces tab, select the faces of part body as shown. It will prevent from re-meshing these surfaces Mesh capture will be automatic Mesh and Exit You can see all the meshes in the tree
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FEM Solid
Do It Yourself (6/6)
Student Notes:
Meshes checking Select the Intersections/interferences icon. Enter a clearance value (it must be less than the smallest edge element length). Notice that there is no elements intersection and interference in that case. Blue elements : no intersections/interferences Pink elements : interferences
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Select the “Free Edges” icon There are no free edges
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FEM Solid
Meshing of an Engine Cylinder Block
Student Notes:
Step 2 - Creating and analysing solid mesh 20 min
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In this step you will : Create solid mesh from surface meshes Analyze the mesh with cutting plane Analyze mesh using quality criteria
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FEM Solid
Do It Yourself (1/3)
Student Notes:
Solid Meshing using Tetrahedron Filler Click on the Tetrahedron filler icon Select the six previous surface mesh parts in the tree for the Mesh Parts field Choose Parabolic as Element type Choose 2 as the size progression
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Click Apply to see preview and then click OK
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FEM Solid
Do It Yourself (2/3)
Student Notes:
Select the six surface meshes By right click, select « deactivate » on them
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Deactivating surface meshes is mandatory as only one mesh part per geometry is taken into account in further analysis computations.
Click on Cutting plane analysis icon Deselect Exact mesh cut: if this option is activated, you can cut the mesh exactly where you drag the cursor. If this option is not activated, the cutting follows the mesh elements. Select « Z » as the cutting plane. Inside elements can be seen by dragging upward or downward along the mesh part On thick areas, size progression effects can be seen
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FEM Solid
Do It Yourself (3/3)
Student Notes:
Check Meshes Quality
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Click on Quality Analysis icon Select all the quality criteria Quality visualisation is activated Click on « Analysis Single » Select an element : its criteria values are displayed
Jan 19, 2009 - Use different solid meshers such as Tetrahedron Filler, OCTREE .... FEM Solid or FMD provides you the tools to create solid meshing of component ..... MeshPart : lets you specify the mesh to extrude, multi selection is ... For example,
Jan 19, 2009 - Right click on them, choose âDeactivateâ. ⢠Click âRotation Mesher â icon. ⢠Select the tetrahedron filler mesh for the meshpart. ⢠Select the ...
Jan 19, 2009 - CATIA V5 Training. Exercises. Version 5 Release 19 ...... Visualize how the restraints defined on the assembly are translated onto the mesh.
Jan 19, 2009 - Recap Exercises : Advanced Surface Mesher. 72 ...... CAD topology made by designers is modified for meshing by analysis ...... Page 150 ...
Jan 19, 2009 - Mesher, Beam Mesher, and OCTREE Triangle Mesher. - Create a new mesh .... welding connection meshes between mesh parts. ...... in two parts. Merge edges : Simplify and merge two lines into one. .... parallel but they must have ..... Pr
Here's the promised solid-state landing light flasher. By Jim Weir. The top view of the chassis. In the January issue, I went into some detail on how to make a.
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Create Ribs and Slots. Create Multi-sections Solid. Create Advanced Drafts. Advanced Solid Features. In this lesson you will learn how to create advanced solid ...
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300 447and the relevant regulation on electrical safety E. N. 60215. The new 2.5kW FM radio transmitter is the latest news among Elettronika FM products.
