HyperMesh for Pre-Processing v2023 Agenda PDF

© Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 HYPERMESH FOR PRE-PROCESSING V2023 AGENDA 1  HyperMesh for Pre-Processing - Agenda...

© Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 HYPERMESH FOR PRE-PROCESSING V2023 AGENDA 1  HyperMesh for Pre-Processing - Agenda © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Training Sessions HyperMesh AGENDA DURATION Fundamental of Practical FEA/CAE and Strength of Material HyperMesh - High class Finite Element Pre-Processing Basic interaction with Altair HyperMesh: - Demo: User interface & workspace - Startup Window 1. Introduction to Hypermesh - Mouse controls, keyboard shortcuts - User interface - Workflow help 3 hours - Preferences - Online help - Selection Methods - Browsers Importing, Exporting CAD and Topology Topology Cleanup 2. Topology Cleanup and Midsurfacing Geometry Preparation Create, Edit and Review Midsurfaces 2D Mesh Generalities and Setup Batch Meshing, Interactive Shell Mesh 3. 2D Mesh and Direct Midmeshing 3 hours Editing Shell Elements MidMeshing 3D Mesh Generalities 4. 3D and 1D Meshing Tetra Mesh, Hexa Mesh 3 hours Beam Modeling Rigids and Connectors 5. Model Setup OptiStruct and Connectors Model and Analysis Setup, Validation and Run 3 hours Analyze Results 2  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 FUNDAMENTAL OF PRACTICAL FEA/CAE 3  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Methods to solve eny engineering problems Analytical Methods Numerical Methods Experimental Methods Classical Approach Mathematical representation Actual Measurements 100% accurate Aproximate, Assumptions Approximate Only Simple problems Real life Complicated problems Time consuming & need Complete itself Results must be verified by either hand Expense set up calculations or Exp. Method Results can not be belived blindy & min 3-5 prototypes must be tested 4  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Finite Element Method (FEM) 5 5  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Traditional design process CAE design process HyperMesh for Pre-Processing, v2023 Requirement Requirement Concept Concept Simulation driven design Design (CAD) Design (CAD) Time Comsuing Physical - Proto Waste money Virtual - Proto t Physical – Test Virtual – Test Design Validation Result interpretation Manufacturability CAE Manufacturability More faster!!! studies studies Manufacturing Manufacturing 6  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Why do we have to create mesh? 7  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Large and Complex Reduce computation model time Why Pre-Processing is very important? Accuracy Convergence 8  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Case Study AIRBUS 9  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Case Study CALSONIC KANSEI 10  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Case Study HYUNDAI MOTOR GROUP 11  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 50 – 70% CAE process in Pre – Processing Modeling Model Checking Analysis setup Linear, Non Linear Boundary Conditions WorkStation/ HPC Materials Properties Report … Validation … 12  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Type of Elements Reduce computation time Practical will use combining 3 types of elements: Solid + Shell + Beam/Bar/String Elements. 13  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Selection bases on Geometry and Shape 1D Element Element shape: Line Addition data: The remaining two dimensions, the cross sectional area Element type: Rod, Beam, Bar, Pipe, … Practical applications – Long shafts, beams, pin joint, connection elements,… 14  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Selection bases on Geometry and Shape 1D Element 15  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Selection bases on Geometry and Shape 2D Element Element shape: Quad, Trias Addition data: Thickness Element type: Thin shell, plate, membrane,… Practical applications – Shell metal part, plastic components like panel,… 16  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Selection bases on Geometry and Shape 2D Element L – Linear Element P – Parabolic Element () – Number of nodes/element 17  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Selection bases on Geometry and Shape 2D Element WHY DO WE GENERATE MID – SURFACE? 1. First, reduce total number of Dofs compared with solid element. Solid element (HEXA, 1st ) have 8 nodes but shell element (QUAD, 1st ) have 4 nodes. 2. Second, solid elements may not capture geometry as good as shell elements in curvature and fillet. 3. Shell elements capture good bending behaviour compared to solid elements. Solid elements will do capture but you need more number of layers of solid elements which means increased number of Dofs, time and disk space. 18  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Selection bases on Geometry and Shape 3D Element 3D element should be used when all dimensions are comparable. Element shape: Tetra, penta, hex, pyramid Addition data: Nothing Element type: Solid Practical applications – Gear box, crank shaft, engine block,… 19  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Selection bases on Geometry and Shape 3D Element L – Linear Element P – Parabolic Element () – Number of nodes/element 20  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Accurary 21  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Convergence Refinement mesh at some specific region give the better results. 22  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 STRENGTH OF MATERIALS 23  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Basic of Strength of Materials 24  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Basic of Strength of Materials Stress and Strain are fundamental concepts that are used to describe how a body responds to external load. The Efficient Engineer 25  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh © Altair Engineering, Inc. Proprietary and Confidential. for reserved. All rights Pre-Processing, v2023 Stress – Strain Diagram The Efficient Engineer 26  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh © Altair Engineering, Inc. Proprietary and Confidential. for reserved. All rights Pre-Processing, v2023 Stress – Strain Diagram The Efficient Engineer 27  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh © Altair Engineering, Inc. Proprietary and Confidential. for reserved. All rights Pre-Processing, v2023 Stress – Strain Diagram The Efficient Engineer 28  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh © Altair Engineering, Inc. Proprietary and Confidential. for reserved. All rights Pre-Processing, v2023 Stress – Strain Diagram The Efficient Engineer 29  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh © Altair Engineering, Inc. Proprietary and Confidential. for reserved. All rights Pre-Processing, v2023 Stress – Strain Diagram The Efficient Engineer 30  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Basic of Strength of Materials Possion’s Ratio Stress – Strain Curve 31  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Basic of Strength of Materials Young’s Modulus Possion Ratio Mass Density 32  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 HYPERMESH INTRODUCTION 33  Altair HyperWorks © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Why use HyperWorks? Faster Product Greater Multi-disciplinary Accurate Modeling Development Collaboration of More Design Alternatives Altair integrated the tools High-fidelity multi-disciplinary, HyperWorks is the unified required for the product multiphysics and multi-model CAE environment for product lifecycles of today’s programs simulations of your development built on the with bi-directional connection increasingly complex and foundation of Altair to PDM systems, while connected product in every HyperMesh, the most trusted enabling multiple variants and operating environment. industry standard for FE sub-systems to be easily modeling and visualization. managed within the same model. Want to learn more? 34 https://www.altair.com  Altair HyperWorks © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Driving More Design with Simulation HyperWorks provides easy-to-learn, effective workflows that leverage domain knowledge and increase team productivity, enabling the efficient development of today’s increasingly complex and connected products. Complete Pre / Post-Processing and visualization environment for Finite Element Analysis, CFD and Multibody System Data. Intuitive direct modeling for geometry creation and editing, midsurface extraction, surface and midmeshing, and mesh quality correction, combined with efficient assembly management. New standard for speed and integration of CAE results Post-processing. Powerful Data Analysis and plotting tool with interfaces to many popular file formats. Want to learn more? 35 https://www.altair.com  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 HyperMesh: One Interface with Multiple Domain Profiles Durability Marine Crash Aerospace CFD NVH 36  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 BASIC INTERACTION WITH HYPERMESH 37  Exercise 01 © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 User Interface and Workspace File Name and Location:..\01-DEMO-GUI.hm Demo Goals: 1. Launch a new HyperMesh client session. 2. Open HyperMesh Model. 3. Show and interact with modeling window. 4. Ribbons and guide bars. 5. Practice with mouse controls. 6. Visualization toolbar > View controls. 38  Launching Altair HyperWorks © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Getting Started In the Startup dialog, you can manage your Session: a. Create a New Session b. Open a Recent Sessions c. Pick a file to open the session directly and set the Client and Profile associated with that file. 39  View Controls © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Keyboard Shortcuts and Mouse Controls Change default mouse controls: Action Command File > Preferences > HyperMesh Rotate or > Mouse Controls Set rotation center on the model while holding Reset rotation center in space while holding or (clockwise) Incrementally rotate or (counterclockwise) Flip the model or Pan Zoom Circle zoom Draw with or draw with Fit (and fit selected) Go back to previous view Save a view - Recall a view - 40  Model Display © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Keyboard Shortcuts Action Command Enter and exit the Show/Hide tool Show selection Show entire model Hide selection Hide and clear selection Isolate selection and turn off all other entity types Isolate selection and retain all other entity types (Show/Hide tool only) Show entities adjacent to selection (Idle mode only) Reverse display of selection Switch the display from mesh only, geometry only, or both (Idle mode only) Toggle On/Off IDs of a selection (Idle mode only) 41  User Interface © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Main Features a.Title Bar b.Menu Bar c.Pages and Windows d.Search e.Ribbons f. Browsers g.Entity Selector h.Modeling Window - HyperMesh i. Modeling Window - HyperView j. Modeling Window - HyperGraph k.View Controls l. Animation Controls m.Status Bar 42  User Interface © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Guide Bars, Workflow Help, Dialogs, Microdialogs and Tooltip 1.Guide Bars a. Show or hide Workflow Help from the View menu. b. Reset selection with Backspace or Esc. c. Proceed and apply with middle-click. Reset Selection 2.Dialogs 3.Microdialogs 4.Tooltip Detailed entity information is displayed when hovering over entities in the modeling window. 43  User Interface © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Preferences File > Preferences Change application settings, graphics, browsers options, mouse controls etc. Use the Search bar inside Preferences to quickly find the option that you are looking for. Hint: For more details, visit Altair HyperWorks Online Help. 44  Launching Altair HyperWorks © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Getting Started HyperWorks offers comprehensive Online Help Documentation. You can also access from: File > Help > Documentation F1 Keyboard Shortcut 45  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Selection Methods File Name and Location: Demo Goals: 1. Selection of entities: a) Entity selector b) Context menu options c) Advanced Selection 46  Browsers © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Overview Browsers supply a great deal of view-related functionality in HyperMesh by listing the parts of a model in a tabular and/or tree-based format and providing controls inside the table that allow you to alter the display of model parts. Browsers in HyperMesh: Model Browser​ Part Browser Entity Editor​ Solver Browser​ Session Browser​ Reference Browser​ Entity State Browser Comparison Browser​ Verification Browser​ Demo Browser Design Explorer Browser​ Mask Browser​ …. 47  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Questions & Answers HyperMesh for Pre-Processing, v2023 1.Which one is true for HyperMesh as a CAE tool? a)HyperMesh is a Pre-Processing tool for Finite Element Modeling b)HyperMesh can translate models from one solver format to another c)HyperMesh can manage topology editing and sketching d)All of the above 48  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Questions & Answers HyperMesh for Pre-Processing, v2023 2.Which is the best method to change Application, Graphics and Browsers settings? a)Import Options b)Application Preferences c)Export Options d)Model Settings 49  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 IMPORT/ EXPORT CAD & TOPOLOGY 50  Exercise 02 © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Importing CAD and Topology Visualization File Name and Location:..\02-sweeps.step Demo Goals: 1. File > Import > Geometry Model 2. Navigate to the provided directory and load the CAD model. 3. Review Geometry Import Options in the dialog > Import. 4. (Optional) File > Export your file in a new CAD format. 51  Geometry Entities © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Surfaces 1.Surface 2.Surface edge Line associated with a surface: Defines a surface’s boundary Cannot be moved off the surface Has a fixed point on both ends 3.Fixed point (“Surface vertex”) Point associated with a surface: Cannot be moved off the surface Can lie on a surface edge or the “interior” of a surface Separates surface edges from each other Forces a node to be placed at that location during meshing 52  Geometry Entities © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Solids Solid Faces - Selectable as surfaces 1. Bounding Faces: Green, belong to 1 solid 2. Partition Faces: Yellow, shared between connected solids Fixed Points - Selectable as points 3. At the ends of edges Edges - Selectable as lines 4. Shared Edges: Green, belong to 2 adjacent faces of 1 solid 5. Non-manifold Edges: Yellow, belong to a partition face or 2 solid faces and 1+ surfaces 53  Topology © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Definition Topology is how surfaces connect to adjacent surfaces of a part. Free edge (red) Associated with only 1 surface Surfaces with a free edge Surface connectivity is controlled between them are NOT by the associated surface edges. equivalenced at that edge Non-manifold edge (yellow) Associated with 3 or more surfaces - Example: If a surface edge is associated Surfaces forming a Shared edge (green) with more than 1 surface, those T-connection. surfaces are considered to be Associated with 2 Surfaces are equivalenced connected (equivalenced). surfaces Surfaces are equivalenced Surface edges are categorized, named, and colored according to Suppressed edge (blue) the number of associated A suppressed edge is surfaces. shared by two surfaces, but it is ignored by the meshing operation 54  Topology © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Repair Process HyperMesh will attempt to properly clean up surfaces during import. Use tools in Some types of geometry files Observe the current Figure out what the Figure out what is HyperMesh to get display of topology (typically native geometry files like ideal surface causing the topology the connectivity as it colors Catia, UG, ProE, etc.) have connectivity of the to be displayed this should be as quickly (Free, Shared, surface connectivity information part should be. way. and efficiently as T-junction). possible. which helps HyperMesh. Topology repair consists of correcting connectivity errors Duplicate surface deleted between adjacent surfaces. Potential errors include: Missing surface created Unconnected adjacent surfaces. Free edge pair Duplicate surfaces. equivalenced Missing surfaces. 55  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Questions & Answers HyperMesh for Pre-Processing, v2023 1.How can I open a geometry data into HyperMesh? a)Using drag-and-drop b)From Folder icon c)Using Keyboard Shortcuts d)All mentioned above 56  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Questions & Answers HyperMesh for Pre-Processing, v2023 2.Among the different CAD formats available in HyperMesh, which are the most recommended ones? a)IGES b)STEP c)Stl d)Proprietary format (Catia, NX, Parasolid) 57  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Questions & Answers HyperMesh for Pre-Processing, v2023 3.What to do about red edges (free edges)? a)Leave all of them b)Remove all of them c)Transform unexpected free edge into shared or non-manifold edges 58  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Questions & Answers HyperMesh for Pre-Processing, v2023 4.What do the different surface edge colors (topology) indicate? How many surfaces are involved, respectively? 59  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 TOPOLOGY CLEANUP 60  Topology Cleanup © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Strategy Overview What can HyperMesh do to cleanup topology? 1. Surface Repair → Automatically find, review, and fix any geometric errors in the model's surfaces. 2. Split → Create/Delete fixed points and split surfaces or solids using a variety of methods. 3. Stitch → Stitch and unstitch adjacent or overlapping surfaces and suppress or unsuppress edges. 4. Patch → Create/Delete patch surfaces between surface edges or free lines that are not connected. 5. Topology and 2D ribbons - Discover a lot more. At the end of the process, create solids from enclosed surface volumes. Extract midsurface for shell meshing or prepare the solid for 3D meshing. 61  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Exercise 03 - Surface Repair HyperMesh for Pre-Processing, v2023 File Name and Location:..\03-Surface-Repair.hm (*) May differ from the steps described here Exercise Steps: 1. Load the model and evaluate its integrity 2. Use Surface Repair to find, review, and fix geometric errors 3. Identify Issues 4. Remove Free Edges 5. Create Closed Shell 62  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Exercise 03 - Surface Repair HyperMesh for Pre-Processing, v2023 1. 2. 3. 4. 5. 63  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 MIDSURFACING 64  Midsurfacing © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Overview 2D ribbon > Surface Mesh group > Midsurface Extract the midsurface of thin solids and review and edit midsurface plates. Hint: FE geometry is not supported for midsurface extraction. Midsurface tool allow you to: Specify base surfaces Extract automatic midsurfaces Edit midsurface plates Imprint lines or surfaces on midsurfaces 65  Midsurfacing © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Base Surfaces 2D ribbon > Surface Mesh group > Midsurface > Base Surfaces Specify a distance from the base surfaces of multiple solids that you wish to treat as if they were continuous. This will help generate separate- but-aligned midsurfaces during extraction. 66  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Exercise 04 – Creating Midsurface HyperMesh for Pre-Processing, v2023 File Name and Location: Exercise Steps: 1. Continue from the last exercise 67  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 GEOMETRY PREPARATION 68  Geometry Preparation © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Strategy Overview What can HyperMesh do to prepare my geometry? There are three main approaches: 1. Manual defeaturing 2. Batch defeaturing 3. Features management 69  Defeature © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Remove Cuts and Edge Fillets Topology ribbon > Edit group > Defeature > Cuts/Edge Fillets Use the Cuts/Edge Fillets tool to extend surface edges and remove cutouts, fillets, and rounds. 1. Select lines, locations, or surfaces. 2. From the drop-down menu, select whether to find Rounds, Fillets, or All. 3. On the guide bar, open hamburger menu for additional Options (Min/Max radius and the Minimum angle). 70  Defeature © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Find and Remove Logos Topology ribbon > Edit group > Defeature > Logos Find and remove logos. 1. If you have already used the Features tool to detect logos, you can use the drop-down on menu on the guide bar to select them directly. 2. On the guide bar, open hamburger menu for additional Options. 71  Defeature © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Remove Rounds and Fillets Topology ribbon > Edit group > Defeature > Fillets Find and remove both Round (convex) and Fillet (concave) surfaces. In general, it is best to remove small fillets first, then larger fillets, then rounds. When you get to a point where you cannot remove any more, it is time to use other modeling tools and strategies to complete the geometry simplification. 1. From the guide bar drop-down menu, select whether to find Rounds, Fillets, or All. 2. If you have already used the Features tool to detect fillets, you can change the entity selector on the guide bar and select them directly as well. 3. Check Use Parasolid to use parasolid geometric kernels for finding and defeaturing fillets/rounds. 4. Uncheck Use Parasolid to activate Ignore edge association and fillet Ends options in the guide bar. 72  Defeature © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Remove Solid Holes Topology ribbon > Edit group > Defeature > Holes Remove solid holes in the model. 1. Holes tool shows count of surface and solid holes detected in the Status Bar. 2. If you have already used the Features tool to detect solid holes, you can use the drop-down on menu on the guide bar to select them directly. 3. On the guide bar, open hamburger menu for additional Options. 73  Defeature © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Examples Cut/Edge Fillets Fillet/ Round Holes Solid Holes 74  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Exercise 05 – Simplify CAD HyperMesh for Pre-Processing, v2023 File Name and Location: Exercise Steps: 1. Continue from the last exercise 75  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Questions & Answers HyperMesh for Pre-Processing, v2023 8.Which of the following is not a cleanup action? a)Equivalencing of "red" free edges b)Detection of features such as beads c)Addition of a washer layer around holes d)Create holes at specific location 76  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 SHELL MESH 77  Shell Meshing © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 How Topology affects the Mesh? Surface edges control how mesh created on adjacent surfaces interact. Free Edges (red) 1. Free edge between 2 surfaces 2. Nodes are placed along edge for meshing 3. Mesh is discontinuous; nodes along the free edge are not equivalenced (Nodes only separated for illustration) Shared Edges (green) 4. Shared edge between 2 surfaces 5. Nodes are placed along edge for meshing 6. Mesh has proper connectivity; nodes along the edge are equivalenced 78  Shell Meshing © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 How Topology affects the Mesh? Surface edges control how mesh created on adjacent surfaces interact. Suppressed Edges (blue) 1. Suppressed edge between 2 surfaces 2. Edge is ignored; nodes are not placed along the edge 3. Area is treated just like 1 surface; there is no line of nodes along the edge T-Junction Edges (yellow) 4. Non-manifold edge between 2 surfaces 5. Nodes are placed along edge for meshing 6. Mesh has proper connectivity; nodes along the edge are equivalenced 79  Shell Meshing © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 How Topology affects the Mesh? Topology operations: 1. Suppressing edges Before 2. Adding edges 3. Removing fixed points 4. Adding fixed points 5. Replacing fixed points After 80  Shell Meshing © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 2D Mesh Strategy Overview 1.Whatever the 2D shell meshing 2D Mesh Geometry Geometry Quality method, it follows the steps Cleanup Preparation Meshing and showed on the right. Editing Interactive meshing require Find and remove Define washers Define target Review the four steps to be addressed unnecessary mesh element quality Find and remove manually by the user. free edges logos Run the mesh Correct areas Find and remove with low quality Please note that integrating 2D mesh Find and remove Adjust the mesh duplicate surfaces unnecessary (for interactive Modify shell quality in the meshing process may force HyperMesh to ignore geometry Close unexpected holes and details processes) meshing with topology locally. holes Cut Holes, Split geometries for guiding 3D Replicate, Hole/Gap Fill mesh 2.Defeature > Batch Repair + Param and Criteria allows to automate geometry cleanup and preparation. 3.BatchMesher + Param and Criteria allow the four steps to be run at once. 81  Shell Meshing © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Edit Criteria and Parameter Topology ribbon > Setup group > Param/Criteria 1. Use Parameter Editor to manage parameter settings used in geometry cleanup and defeaturing. Param file is used by BatchMesher, Autocleanup, Auto Quality and Rebuild. 2. Use Criteria Editor to manage criteria settings used in QI (Quality Index), batch meshing, and in QI-based element checks. Setting a proper Criteria file is one of the most important steps before starting meshing or mesh editing. Many tools like Midmesh, Rebuild, Auto Quality, Edit Elements and even the Element Quality Face Color mode all depend on having this set properly. Hint: If Criteria and Param files are already loaded in the session, then users don’t need to load them again and they will be accessible in the session for all relevant tools. 82  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Questions & Answers HyperMesh for Pre-Processing, v2023 1.Which types of mesh can you create in HyperMesh? a)2D and 3D Meshing b)1D, 2D and 3D Meshing c)Only Solid Meshing d)Only 2D Meshing 83  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Exercise 06 – Create Shell Mesh HyperMesh for Pre-Processing, v2023 File Name and Location: Exercise Steps: 1. Continue from the last exercise 2. Create mesh using Batch Mesher 3. Create mesh using Freeform (General Mesh 2D) 84  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 EDIT SHELL MESH 85  Editing Shell Elements © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Auto Quality 2D ribbon > Edit group > Auto Quality Automatically correct selected element quality. 1. Select elements to fix and, optionally, activate the Anchors selector to select anchor nodes to be preserved. 2. Click Review on the guide bar to isolate affected elements. 3. On the guide bar, open hamburger menu to: Edit parameters and criteria. Consider affected elements only - Correct only elements that are failing the criteria checks, including an optional number of adjacent layers. Remesh elements failing QI - Correct quality by local remesh failed elements. Reduce tria elements - Allows local remeshing around tria elements. 86  Editing Shell Elements © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 What can I use to Edit 2D Surface Mesh Elements? 2D ribbon > Edit group > Edit Elements Edit 2D Elements by smoothing, moving, splitting, collapsing, replacing, creating and adjusting the edge density of elements. It is possible to combine two or more options in order to edit the mesh. 87  Editing Shell Elements © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Smooth Elements 2D ribbon > Edit group > Edit Elements > Smooth 1. Smooth selected elements to optimize their quality with optional Anchors nodes which are not moved. When is a node of shell element free? When can be moved? A node of a shell element is free, and therefore can be moved, if: It isn’t used by an element that was not selected and It isn’t selected as an anchor node. It isn’t attached to an edge, vertex or meshing fixed point of a surface. It isn’t used by a 1D element (whether or not that element is selected). It is attached to a surface but isn’t on a feature line of the mesh of the selected plate or shell elements. 2. Open hamburger menu to define Options used to edit elements. Number of smooth Iterations, selection type to keep after smoothing operation, preserve free edge nodes as anchor nodes. 3. In the microdialog, select a smoothing method. Hint: Always set up proper Parameters and Criteria before performing smoothing operations. This helps to achieve better element quality results. 88  Editing Shell Elements © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Move Elements 2D ribbon > Edit group > Edit Elements > Move Move nodes, drag trias elements, modify holes and washers and automatically optimize nodes and elements. 1. Edit elements with mouse and keyboard shortcuts as shown in the picture on the right. 2. Open hamburger menu to define additional Options. Enables two trias to be merged into one quad element. Automatically move, scale, change the radial or angular position of washer nodes. Automatically Remesh layers around a hole after modifying it. You can toggle Graphical preview. 89  Editing Shell Elements © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Split, Swap, Combine Elements 2D ribbon > Edit group > Edit Elements > Split Split quad elements and edges, combine tria elements and swap element edges. 1. Select a Split method from the guide bar drop-down menu. 2. Open hamburger menu to define additional Options. As in the other editing tools, Enable QI Color Mode option is off by default. Hint: For more details, visit Altair HyperWorks Online Help. 90  Editing Shell Elements © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Replace Nodes 2D ribbon > Edit group > Edit Elements > Replace Relocate and replace the positions of nodes. 1. Select a Replacement method from the guide bar drop-down menu then select nodes/element edges. One to One / Multi to One Multi to Multi - Select Source/Target nodes By Path using Advanced Selection. 2. On the guide bar, open hamburger menu to define additional Options. Choose to be warned if the node replacement results in an element collapsing. Hint: For more details, visit Altair HyperWorks Online Help. 91  Editing Shell Elements © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Edit Edge Density and Element Size 2D ribbon > Edit group > Edit Elements > Density Edit element density and size along surface edges. 1. In the microdialog, click the icon to switch the value being defined to either Density value or Element size. 2. On the guide bar, open hamburger menu to define additional Options. 92  Editing Shell Elements © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Create and Delete 2D ribbon > Edit group > Edit Elements > Create Create new 1D/2D/3D elements and delete elements. 1. On the guide bar, open hamburger menu to define additional Options: Where new elements are created. Type of element to create. Click on Element Config hyperlink to open Entity Types tab under HyperMesh Preferences. 2. Optionally, click Find to identify all elements at or below a certain quality level. 93  Editing Shell Elements © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Associate Nodes to Geometry 2D ribbon > Edit group > Edit Elements > Associate Find non-associated nodes, review them, and associate to target geometry. This is useful in cases where you load CAD and FE separately. 1. On the guide bar, from the drop-down menu select to: Associate (Automatic or Manual) Dissociate. 2. A legend indicates which nodes are associated and to which geometry entities. 3. Check the Move nodes option to project source nodes onto the target entity along with the association. 94  Editing Shell Elements © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Normals 2D ribbon > Edit group > Normals The normal of an element is determined by following the order of nodes of the element using the right-hand rule. 1. Reverse the normals of selected surfaces/unassociated mesh. 2. Adjust the normals of selected FE Adjust the geometry surfaces/unassociated normals of mesh. FE geometry Reverse the normals of surfaces FE geometry surfaces a. On the guide bar, open hamburger menu to define additional Options. View Controls toolbar > Face Color > Normals Red → Positive side of a shell or surface. Blue → Negative side. 95  Align and Project © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Overview Align Nodes Topology ribbon > Edit group > Align/Project Project entities to lines, surfaces, or planes then remap and offset projected nodes. 1. Align to Lines Check Use end nodes option to auto- detect end nodes based on your source selection and align between them. Otherwise, select Target entities to align to. 2. Align to Surfaces Align Elements to Surfaces Align Elements to Plane 3. Align to Planes 4. Use the icons in the microdialog further refinement. 5. On the guide bar, open hamburger menu to define to toggle Graphical preview option. Hint: For more details, visit Altair HyperWorks Online Help. 96  Fix Elements © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Edges, Faces, Equivalence Validate ribbon > Fix Elements group 1.Use Edges tool to find free edges and "T" connections in a group of shell elements and create1D elements from them. 2.Use Faces tool to find free faces in a group of 3D elements and create shell elements from them. 3.Use Equivalence tool to find, tour, and equivalence duplicate nodes. 4.On the guide bar, open hamburger menu to define additional Options. Hint: For more details, visit Altair HyperWorks Online Help. 97  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Exercise 07 – Edit Shell Elements HyperMesh for Pre-Processing, v2023 File Name and Location: Exercise Steps: 1. Continue from the last exercise 98  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 MID MESH 99  MidMeshing © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Automated Mesh Generation Easily generate mesh at midplane for complex parts. Midmesh is extracted as FE Geometry. Cleanup Create Rebuild Apply Resulting Midmesh Mesh Thickness Ideal for plastics, castings, Topology and machined parts. Significant time savings over traditional midsurface and mesh approach. Exposed within BatchMesher to + streamline the Model Build Edit Elements and Topology tools workflow via Part Browser. Simple and powerful semi-automated editing tools to assist in correcting common issues. Midmesh editing tools are improved to obey Topology Revision options in Preferences. 100  MidMeshing © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Common Examples 101  MidMeshing © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Automatic 102  MidMeshing © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Repair Midmesh Elements or Fill Face 2D ribbon > Surface Mesh group > Midmesh > Repair/Fill Repair midmesh by attempting to fix topological problems and remeshing the face. Create a mesh within a closed topology loop, attempting to keep tangency. Select 1D topology and free edges are Elements considered for loop completion. By Face 1. Find intersecting element clusters and holes/gaps/cracks, and create element sets for further handling. 2. On the guide bar, open hamburger menu to define Options: Merge filled face does not keep shared edges between new surfaces and existing surfaces. 103  MidMeshing © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Create Midedge 2D ribbon > Surface Mesh group > Midmesh > Create Midedge Using the Node List selector, select 2 or more nodes to create a midedge. 1. Along with the Node List, select guidelines using the Guide A and Guide B selectors. These guide the path for the new midedge. No edge, single edge or two edge chains are allowed. Hint: Continue to guidelines with Tab. Select Node/Line By Path with Alt + left-click. 104  MidMeshing © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Edit Midmesh Topology 2D ribbon > Surface Mesh group > Midmesh > Edit Topology Split topology to create a new edge in the following ways: 1. Create a new edge between two nodes (Source selector to Nodes). a. Select Align after topology edit to align edges using guidelines after splitting. b. Check Retain last node to retain the last node of the previous split. 2. Create a new edge between a node and an edge (Source selector to Nodes). On the microdialog, select whether to use and click Split: c. Shortest path d. Source Node to Imprinted Node e. Tangential f. Mixed 3. Create a new edge on an FE edge (Source selector to FE Edges). 105  MidMeshing © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Align 2D ribbon > Surface Mesh group > Midmesh > Align 1. Align midmesh: Elements to surfaces (Source selector to Elements). FE geometry surfaces to surfaces (Source selector to Surfaces). FE geometry edges to lines (Source selector to Lines). Nodes to lines (Source selector to Node List). 2. On the guide bar, open hamburger menu to define additional Options. Offset elements or FE geometry surfaces using Guide A at specified Distance. Lock boundary nodes when aligning faces. 106  MidMeshing © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Align Examples with different Sources: 1. Elements 2. Surfaces 3. Lines 4. Nodes 107  MidMeshing © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Editing using Topology Tools Extrude edge along a guideline. Add missing rib using Ruled. Add missing features using Imprint. Split mesh by plane. Extend mesh using Extend. Create patch between imprinted edges. 108  Rebuild Mesh © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Overview 2D ribbon > Surface Mesh group > Rebuild 1. Select elements to rebuild. 2. From the microdialog choose to detect and rebuild only elements that affect mesh quality/flow the most. It is recommended to first use Rebuild which regenerates mesh on selection and then iterate with Improve Rebuild. 3. Add one or more Flow Guides. 4. On the guide bar, open hamburger menu to define additional Options. Keep the element selection for selective rerun. Hint: For more details, visit Altair HyperWorks Online Help. 109  Map Thickness © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperMesh for Pre-Processing, v2023 Overview 2D ribbon > Surface Mesh group > Map Thickness 1. Apply thickness values to midmesh elements (Target), based on Source geometry. The thickness will be assigned on the midmesh either on node card, element card, nodal thickness on element card or also as properties on elements depending on the solver interface you are using. This tool is only available in OptiStruct, Radioss, Abaqus, LS- DYNA, PAM-CRASH 2G or Nastran solver interfaces. 2. On the guide bar, open hamburger menu to define additional Options. Hint: For more details, visit Altair HyperWorks Online Help. 110  © Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Exercise 08 – Mid Mesh & Assign thickness HyperMesh for Pre-Processing, v2023 File Name and Location: Exercise Steps: 1. Continue from the last exercise 111 CHANGING TOMORROW, TOGETHER. altair.com #ONLYFORWARD