AltairSimLab - Meshing and Modeling v2022.3a PDF

© 2020 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. ALTAIR SIMLAB - MESHING AND MODELING COURSE Trainer: – v2022.3  © 2020 Altair Engineering, Inc. Proprietary and Confidential. All rights...

© 2020 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. ALTAIR SIMLAB - MESHING AND MODELING COURSE Trainer: – v2022.3  © 2020 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Agenda Altair SimLab Meshing and Modeling Course Getting Started Model Management CAD-Based vs Mesh-Based Editing 3.1 CAD Based Assembly Stage 1: CAD Based Modeling 3.2 Mesh Based Assembly 1.1 CAD Based Defeaturing 3.3 Bolt Modeling 1.2 Fundamentals of Meshing 3.4 Contacts Stage 2: Mesh Based Modeling Extra 2.1 Mesh Controls, Mesh Templates Hex Meshing Tools 2.2 Mesh Editing and Cleanup Solver Deck set-up and export Working with Results Stage 3: Assembly and Connections 2  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. GEOMETRY EDITING: CAD BASED VS MESH BASED 3  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Defeature Geometry CAD BASED (Stage 1) MESH BASED (Stage 2) Defeature CAD; then mesh Surface Mesh; then defeature FEM for Parasolid CAD only. for all other CAD formats. 4  © 2020 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. STAGE 1 – CAD BASED MODELING PROCESS (PARASOLID) 5  © 2020 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. CAD-Based Workflow Import Parasolid Modify Assembly Shell / Volume Mesh Cleanup Connections Solution Setup Results  © 2020 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 1.1 CAD BASED DEFEATURING  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. CAD-Based Workflow Import Parasolid Modify Assembly Shell / Volume Mesh Cleanup Connections Solution Setup Results  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Import CAD Simply drag and drop the Parasolid file _transmissional_housing_v4.xmt_txt This allows to edit geometry Model imported in mm, according to chosen units  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Parasolid CAD Defeaturing Simplifying a CAD Geometry is an operation that is often not required. We invest time in defeaturing, to obtain a better mesh or a lower number of elements, only if our simulation requires it. We may decide to remove: - Logos / Part Numbers (defeaturing always recommended) - “Small holes” (sometimes needed) - Chamfers and Fillets (usually not necessary) Logos / Details Fillets/Chamfers optional Small Holes 10  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Remove Details: Logo Logos also can be identified by thickness with Select Features Use Enclosed picking! Isolate to check what you picked 11  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Remove Details: Logo - Faces Done! 12  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Remove Details: Logo – Bodies by thickness 13  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Remove Details: Holes / Chamfers Both options work for holes and chamfers! Note: Small Holes may affect the mesh quality, it is recommended to remove them if they are not needed. Instead, chamfers give usually less problems with mesh quality. Small chamfers may only be removed to preserve the shape of the adjacent faces. 14  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Selection Tips: Holes (Cylinders) / Chamfers (Cones) Circular Selection Filter + Identical Faces By radius, with Select Features Circular/Cones advanced selection filter Identical Faces option on right-click Find Chamfers (Cones) Find Holes (Cylinders) Select Features (right-click menu) Find Holes 15  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Optional: Defeaturing Fillets Fillet selection filter Usually, fillets do not affect the quality and the number of elements. On the contrary, removing them could create fictive stress-hotspots along the sharp edges. For this reason, defeaturing fillets is generally not recommended and should only be done if explicitly required by the modeling task. Moreover, complex fillets of casted parts can usually be removed easily by the designer in the CAD environment (CATIA, Creo…) BEFORE exporting the geometry. Note: fillet defeaturing is often more effective on Parasolid than on the mesh. Both options work for fillets 16  © 2020 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 17  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. MORE CAD EDITING TOOLS 18  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Align/Plane - CAD Faces 19  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Merge CAD faces There is no usually need to suppress small Merge Faces to edges manually! suppress CAD edges. They are removed automatically while meshing!  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Fill missing faces in a Parasolid body  © 2020 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 1.2 FUNDAMENTALS OF MESHING  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. CAD-Based Workflow Import Parasolid Modify Assembly Shell / Volume Mesh Cleanup Connections Solution Setup Results  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Quick 2D Mesh 2D Mesh the body Carrier (Tri6, 6mm): - Basic parameters of the meshing panel - CAD Model vs FEM Model  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Mesh Size Use the Measure tool to identify an adequate element size. Alternative: in the Output Window (F9) you can read the size (as length, radius…) of any entity you select. 25  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 2D Mesh Linear / Quadratic Element Element Size / Minimum Element Size Curvature Refinement  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Element Size Minimum Element Size Avg/Max Element Size Mesh Growth Factor (here: +50% per element) Min element Size is responsible for the automatic Geometry Cleanup: Whenever a geometry edge would generate an element below the Minimum Element Size, SimLab would suppress it automatically. 27  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Curvature Refinement Geometry Approximation Mesh gets finer on curved surfaces 45° maximum angle 30° maximum angle 8 elements around holes. 12 elements around holes. 2 elements across 90° fillets. 3 elements across 90° fillets. 28  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Curvature Refinement: effects on 90° fillets ←Min element size: 0.6mm ←Max angle per element: 30° ←Curvature min size: 1.5mm Fillets ≥ 4.5mm (=1.5mm x3) 3mm ≤ Fillets < 4.5mm 0.6mm ≤ FIllets < 3mm (=1.5mm x2) Fillets < 0.6 3 element rows 2 element rows 1 element row suppressed 29  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 2D Mesh Mesh Bodies are separated from CAD! They appear in a new Model in the browser. Here to abort the meshing process if needed 30  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. FEM vs CAD: Bodies and Models FEM Entities are new entities, independent from their CAD parents! Each Model (FEM or CAD) has its own, independent numbering. Geometry entities (Faces, Edges and Vertices) are recreated on the FEM Body. Metadata from CAD-entities (shape, position, color-code, ID…) are mapped on the related FEM entities. 31  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Automatic Mesh Controls 2D Mesh again the CAD-body Carrier using option Identify Features and Mesh Compare with “classic” meshing: - Number of Elements/Nodes - Element Quality  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Volume Mesh Choose the mesh version you prefer and fill the shells with 6mm-Tet10s. 33  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Choose target quality-criteria to be achieved Volume Mesh body “Replace the mesh” to fill the existing shells with tets 34  © 2020 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. STAGE 2 – MESH BASED MODELING PROCESS 35  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Mesh-Based Workflow Import CAD Surface Mesh Modify Assembly Volume Mesh Cleanup Connections Solution Setup Results  © 2020 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 2.1 MESH CONTROLS, MESH TEMPLATES  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Mesh-Based Workflow Import CAD Mesh Controls → Surface Mesh Modify Assembly Volume Mesh Cleanup Connections Solution Setup Results  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Mesh Controls Import/Export Mesh Controls Empty The density, the quality and the structure of the mesh can be controlled by defining Mesh Controls for the geometry. Mesh Controls are usually defined on CAD entities but, in some cases, to FE entities too (for example for remeshing) Mesh Control Browser Note: Mesh Controls (defined on a CAD or FEM body) affect only the meshing of the body itself - not CAD- parent nor its FE-children!  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Panel List of all available Mesh Controls Right-click on selected entities  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Mesh Controls In a new database, import again the CAD _transmissional_housing_v4.xmt_txt Import Mesh Control Specification 2.1_Mesh_Template_MMKS.xml Notice: if you are not using units in this exercise, you can import the template 2.1_Mesh_Template_NO_UNITS.xml 41  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Mesh Controls Mesh Controls have been imported, but not assigned 42  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Mesh Control Browser - Options Double click MC to view/assign/edit 43  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Double-click to assign all imported Mesh Controls to the entities. 44  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Body Mesh Control Body mesh control overwrites locally – for each body – the global meshing parameters Mesh Size, Geometry Approximation, Growth… Coarse, 7mm Fine, 4mm Turn on column in the assembly tree Table view (right click menu on browser)  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Fillet Mesh Control Definition through Angle per Element Definition through CAUTION: use the option Number of elements only for selected fillets with Number of “uniform curvature”. Element Rows If you want to define a general rule for ALL fillets in your body, you’d better use the Geometry Approximation option! This can also be set in the Body MC, so you won’t need always an additional MC for fillets. 46  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Fillet Selection How to select fillets quickly: Use the dedicated selection filter OR Find them with Select Features: Face by angle filter picks whole pockets Select Features to find filllets 47  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Cylinder Mesh Control Cylinder Mesh Control controls both axial and radial mesh size on cylindrical surfaces. Axial direction: element size in mm. (see Isoline MC to enter number of elements) Circular direction: size or number of elements (preferably a multiple of 4 to preserve the edges). 48  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Cylinder Selection Or use Select Features: Select one cylinder with the circular selection filter and find the others with Select Identical Faces: Window-selection of faces 49  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Washer Mesh Control The Washer Mesh Control is used to create rings around a circle - typically to imprint bolt heads on a surface. Use the Circle selector or Select features 50  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Logo-and-Details Mesh Control Defeatures logos and details on the resulting mesh without editing the CAD. Select the faces using the enclosed picking.  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Logo selection by Thickness Select Features / Thickness Based is widely used in automated (and manual) processes to identify logos and part numbers.  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Preserve Shape Mesh Control The automated meshing process collapses sliver edges and faces to reach the requested minimum element size. Preserve Entity Mesh Controls allow the user to decide which/how entities should be suppressed. Preserve Entity | Face shape retains the shape of the face (planarity / cylindricity), avoiding that nodes move out of the face. Typically used for contact/assembly faces. Note: This usually does not prevent narrow faces and edges from collapsing, but it defines the direction in which nodes are moved. ? 53  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Display in Color When applying mesh controls, the color display is set to reflect the different types of mesh controls being applied. Use “Display in Color” and “Display in Body Color” for different color modes. You can choose from the color display modes Display in Body Color – Default color display 54  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. SHELL-MESH  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 2D Mesh Entries in the panel are not relevant when all bodies already have a mesh control. In the preferences, set multiple cores when meshing more than one CAD body.  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 57  © 2020 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 2.2 MESH EDITING AND CLEANUP  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Mesh-Based Workflow Import CAD Surface Mesh Modify Assembly Volume Mesh Cleanup Connections Solution Setup Results  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Mesh-Based Workflow Import CAD Mesh Controls → Surface Mesh Modify Assembly Volume Mesh Cleanup Connections Solution Setup Results  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. LOCAL RE-MESHING 61 © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Re-Mesh Test the main local re-meshing options.  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Re-Mesh Re-mesh: used to refine, coarsen or cleanup creates regular triangles. Preserve boundary edges: ON Preserve boundary edges: OFF 63  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Grid Mesh Mesh | Grid Mesh : creates isometric mesh on the face. Edit the number of elements in the panel or by clicking on the edge. 64  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Grid Mesh 65  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Change Layers Use Mesh | Layers to fix the number of elements for iso- meshed circular faces like cylinders, cones and hollow discs. Cone Cylinder Hollow Disc Axial Circular Radial  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. MESH-BASED DEFEATURING 67  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Geometry Editing: CAD-Based vs Mesh-Based CAD BASED (Stage 1) MESH BASED (Stage 2) Edit CAD; then mesh Surface Mesh; then edit FEM Parasolid for Parasolid CAD only. for all other CAD formats. (Requires CAD translation) (Requires Surface Meshing) All CAD ☺ Works Better, Quicker ☺ Works always ☺ Can be combined with Mesh Editing ☺ Allows native CAD formats, w/o translation  CAD translation may cause problems.  It may require cleanup to repair modified mesh. 68  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Defeature Geometry CAD BASED (Stage 1) MESH BASED (Stage 2) Defeature CAD; then mesh Surface Mesh; then defeature FEM for Parasolid CAD only. for all other CAD formats. 69  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Mesh Defeaturing Test the defeaturing options on Mesh body. 70  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Mesh Defeaturing: Holes Mesh-Based removal of blind holes and through holes. Not to be confused with All small Geometry | Fill Holes, holes which is a tool to repair the topology. Only selected holes 71  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Mesh Defeaturing: Fillets and chamfers Remember: Removal of complex fillets is often easier on CAD (in CATIA/CREO/UG etc. or on Parasolid in SimLab). Defeaturing fillets is usually not even recommended since it could cause additional stress-hotspots. or or Search for feature: Cones 72  © 2020 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. STAGE 3 – ASSEMBLY AND CONNECTIONS 73  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. MODEL MANAGEMENT  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Managing large models Large assemblies with hundreds of components are sometimes difficult to handle. SimLab offers therefore some management tools: Model manager Sub Models and Bins Model specification Identical bodies 75  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Sub Model and Bins Sub Models Bins are handled as single bodies in the model tree. Bins can be converted into Sub Models, and vice versa. Sub-Mod operations 76  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Identify Screw / Identical / Duplicate / By Size… The drop-down menu of the Geometry|Body ribbon offers additional tool to find, filter, organize, group the bodies in the assembly. 77  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. ASSEMBLY OPERATIONS: CONNECT BODIES  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. SimLab Workflow Import CAD Import Parasolid Surface Mesh Modify Assembly Modify Assembly Shell / Volume Mesh Cleanup Volume Mesh Cleanup Connections Connections Solution Setup Solution Setup Results Results  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Connect Geometry CAD BASED MESH BASED Join CAD; then mesh Mesh; then join FEM for Parasolid CAD only. for all other CAD formats. Use Boolean to connect Use Join to connect Parasolid CAD Bodies. Surface Mesh Bodies. 80  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. CONNECT CAD BODIES  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Connect Bodies – CAD Based 82  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Connect CAD Bodies Pick all bodies 83  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Just one connected CAD body Use CTRL+3 to toggle the display of non- manifold edges around shared faces. 84  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Mesh connected bodies Meshing the Connected CAD body creates a (connected) Mesh Body. 85  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Unmerge Mesh Body Original body names are retrieved. 86  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Explore Connected Mesh Bodies Connect|Shared isolates the shared faces. Note: Connect|Separate would convert shared faces into pairs of not-connected congruent faces. CTRL+3 toggles ON/OFF the display of non manifold edges (i.e., edges of shared faces) 87  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Connected Mesh: one-click approach Apart from the manual approach, a one-click way is also available and can be used when we are sure that the assembly operation will be successful. This works for Parasolid CAD only. Mesh the Parasolid assembly by turning ON “Create matching mesh (Parasolid)” in the Surface Mesh or Tet Mesh panel. This will create the connection (Shared faces) between the bodies in the assembly after meshing.  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. One-click Workflow: All bodies selected Turn ON and Mesh Load the solved exercise 3.2a_BodyCreation.slb 89  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Meshed bodies 90  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. The connected assembly is now ready for: Volume Mesh Quality Cleanup … 91  © 2020 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 3.2 MESH BASED ASSEMBLY 92  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Mesh-Based Workflow Import CAD Surface Mesh Modify Assembly Volume Mesh Cleanup Connections Solution Setup Results  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. JOIN OPERATIONS  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. To convert shared entities into matching pairs To create shared entities To display shared entities 95  © 2020 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 3.3 CONNECTORS AND BOLTS  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. SimLab Workflow Import CAD Import Parasolid Surface Mesh Modify Assembly Modify Assembly Shell / Volume Mesh Cleanup Volume Mesh Cleanup Connections Connections Solution Setup Solution Setup Results Results  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Generic Connectors RBEs Automatic, semi-automatic and manual creation of connectors for structural and thermal analysis: Rigid (RBE2, RBE3, RBAR) Bar Element Bush, Spring, Damper MPCs Joint, Gap Element, Plot Element, Matrix Element  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Bolt Modeling –Overview Bolt Modeling Menu: Advanced | Bolt Modeling 1D Modeling (NVH Bolt) 3D Modeling (Solid Bolt) Rigid/Bar Tet/Hex Quick Advanced Automatic CAD Pattern Face/Group Pretension Head + Thread + Template Based Template Based Connection Based Based 99  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 1D BOLTS 100  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 1D Bolts (NVH Bolts) 1D Bolt Modeling lowers model complexity. Bolt Head: RBE Spider o Preferably use RBE3 elements to transfer loads without increasing stiffness o Use RSpider = (RHead+RHole) / 2 Bolt Shaft: Bar Elements o Assign Property / Section / Material o Use at least 2 bar elements Picture: Prof. Dr. Dieter H. Pahr o Define a Pretension Load between the bars to simulate Bolt Tension 101  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 1D Bolts (NVH Bolts) Advanced / Multiple 1D Bolt Automatic Bolt Bolt Head Import template (text) Bolt Thread Connect Quick 1D Bolt with Pretension Automatic Bolt Using templates (GUI) 102  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Quick 1D Bolt with pretension Trough Hole Thread Hole Pretension Force 103  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Please refer to SimLab Help, to the Learning Center and to our Tutorials for more information about 1D Bolt Creation. 104  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 3D BOLTS 105  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Bolt Modeling –Overview Bolt Modeling Menu: Advanced | Bolt Modeling 1D Modeling (NVH Bolt) 3D Modeling (Solid Bolt) Rigid/Bar Tet/Hex Quick Advanced Automatic CAD Pattern Face/Group Pretension Head + Thread + Template Based Template Based Connection Based Based 106  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 3D Bolts (Hex Bolts) Hex Bolts Pattern Based 3D Pretension from CAD Template Based Face / Group Based 107  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Hex Bolts from CAD Tool in the Geometry | Body ribbon: Other meshing tool in the Mesh ribbon: Use the same values of the Cylinder Mesh Control on Bolt Hole to obtain a congruent mesh. 108  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Hex Bolts: Face/Group Based (Automatic) Creates automatically Hex Bolts with congruent mesh with the connected bodies. Pick washer faces or group. Use Select Features | Hollow Discs or Select | Identical Faces Pick thread faces or group. Use Select Features | Cylinder or Select | Identical Faces Groups are automatically generated when defining contacts and the pretension. 109  © 2020 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. 3.4 CONTACTS  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Contacts: with / Without Solution With Solution: for OptiStruct, Without Solution: for ADVC, Radioss, ABAQUS, PERMAS. Nastran, Ansys. LBC Browser Solution Browser  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Automatic Contacts between all bodies When creating a Solution In the Contact Panel – with Auto Contact Contact Entities - Bodies 112  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Manual Contact Creation Contact Conditions Contact Entities Interaction (Friction, Face/Set Conductance) Tolerance for contact creation Press-fit (Clearance, Plane/Cylinder/All shapes Interference) Trim Option Solver specific parameters Extra options in Preferences 113  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Contact Manager and Tools Browser Right-Click Menu 114  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Example: Contacts for Hex Bolts 3.3_SolidBolts.slb Solution for Structural Analysis (OS or ABQ) Cylindrical contacts between Bolts and Carrier Planar contacts between Bolts and Cover Planar contacts between Cover and Carrier 115  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Example: Contacts for Hex Bolts 116  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. WELD CONNECTIONS 117 © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Welds  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Welds Different creation options are available. Please see Help (F1) for more details 119  © 2020 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. EXTRA  © 2020 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HEX MESHING TOOLS 121  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Hex Meshing Tools Automatic / Semiautomatic Manual Tools Editing Tools Hex Meshing Tools  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Automatic Hex Tools 123  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Hex Meshing: Manual Process Divide body with Break Mesh regions using manual tools Further information in the dedicated presentation. Complete tutorials in SimLab Learning Center. 124  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HEX LAYERS CONNECTED TO TET MESH  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Inwards: Connected Hex Layers Re-mesh with Quads Hex Layers inside a Tet-Body ATTENTION: it is not possible to match all nodes between HEX and quadratic TET10 elements. Please use Penta (“wedges”) or linear TET4 elements instead (or Pyramids, if supported by your solver) 126  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Outwards: Extrude Face Penta-Layers Gasket Hex-Layers Bush 127  © 2020 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. SETTING UP AND EXPORTING THE SOLVER DECK 128  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. SimLab Workflow Import CAD Import Parasolid Surface Mesh Modify Assembly Modify Assembly Shell / Volume Mesh Cleanup Volume Mesh Cleanup Connections Connections Solution Setup Solution Setup Please refer to our Solution Courses for more details Results Results  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Defining System of Units Choose System of units for a new (empty) database Save as Database in MMKS to enable units on an existing database with no units.  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Material / Property AMDC Properties are needed only for non- Create New default element types (ex: shells). Database Material/Prop Browser  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Solver deck Creation First create solution if you are using Altair Solvers (OptiStruct, Radioss, AcuSolve, nFX, Molding, Flux, ElectroFlo) or ABAQUS or Permas. Set up directly LBCs and solver options for all other solvers: Actran, ADVC, Ansys, Converge, Femap, Fluent, LsDyna, Marc, Nastran, Patran, Samcef  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. LBC creation Defining some Loads and Constraints on the assembly before exporting the solver deck. 133  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. LBC creation 134  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. LBC creation 135  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. LBC creation With Solution: Without Solution: LBCs are added to the current solution LBCs are added to the LBC Browser 136  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Load Cases With Solution: Without Solution: 137  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Entity Sets Entity based creation Automatic creation from groups Set pair creation for contacts 138  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Solver Settings With Solution: Without Solution: 139  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Export Mesh / Write Solver Deck With Solution: Without Solution: 140  © 2020 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. WORKING WITH RESULTS 141  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. RESULT MAPPING 142  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Result Mapping: Mapping Tool Create Temperature, Pressure and other load fields from tabular results. The result table may have the format: X, Y, Z + Value or ID + Value (requests reference Mesh)  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Result Mapping: Through Solution Create a solution by importing the results of a previous simulation; map them as a load in your current solution. 144  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. REFINEMENT FROM HOT SPOT  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Mesh Refinement from Hot Spot 1/2 Stress Hot-Spots Region Mesh Controls 146 for refinement  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Mesh Refinement from Hot Spot 2/2 Local remeshing using the region mesh control and re-run the solution to get better results in the hot- spot region. 147  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. RESULT TOOLS FOR POWERTRAIN  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Bore Distortion Determine the degree of cylinder bore distortion from displacement results associated with the grid points of the bore surface.  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Bore Distortion Create and export distortion Tables or graphs based on the results.  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Valve Seat Distortion This tool helps to determine the radial distortions in intake and exhaust valve seats corresponding to a single combustion chamber. 151  © 2020 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. LEARN MORE  © 2022 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Want to Learn More? Uma imagem contendo captura de tela Descrição gerada automaticamente Uma imagem contendo captura de tela Descrição gerada automaticamente SimLab Help SimLab Learning Center SimLab Forum https://web.altair.com/simlab-learning-center https://forum.altair.com/forum/48-altair-simlab  © 2020 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Altair SimLab Courses Meshing and Modeling Altair SimLab Basic – Meshing and Modeling Altair SimLab Automation (Python)  © 2020 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Altair SimLab Courses Solutions General Multiple Physics Introduction to Altair SimLab Solutions Altair SimLab – Electronics Structural Analysis Altair SimLab – Injection Molding Structural Linear Analysis (Static, Dynamic) Structural Non-Linear Analysis Altair SimLab – CFD NVH, Acoustic Optimization Altair SimLab –nFX Drop Test and Impact Test Simulation THANK YOU altair.com #ONLYFORWARD