Mechanical APDL Basic Analysis Guide - Ansys
Mechanical APDL Basic Analysis Guide - Ansys Mechanical APDL Basic Analysis Guide - Ansys
ANSYS Mechanical APDL Basic Analysis Guide iv 2.5.6.2. Scaling Force Values ....................................................................................................... 33 2.5.6.3. Transferring Forces ........................................................................................................ 33 2.5.7. Surface Loads ......................................................................................................................... 34 2.5.7.1. Applying Pressure Loads on Beams ................................................................................ 35 2.5.7.2. Specifying Node Number Versus Surface Load ................................................................ 35 2.5.7.3. Specifying a Gradient Slope ........................................................................................... 36 2.5.7.4. Repeating a Surface Load .............................................................................................. 39 2.5.7.5. Transferring Surface Loads ............................................................................................. 39 2.5.7.6. Using Surface Effect Elements to Apply Loads ................................................................ 40 2.5.8. Applying Body Loads ............................................................................................................. 40 2.5.8.1. Specifying Body Loads for Elements ............................................................................... 41 2.5.8.2. Specifying Body Loads for Keypoints .............................................................................. 42 2.5.8.3. Specifying Body Loads on Lines, Areas and Volumes ....................................................... 43 2.5.8.4. Specifying a Uniform Body Load .................................................................................... 43 2.5.8.5. Repeating a Body Load Specification .............................................................................. 43 2.5.8.6.Transferring Body Loads ................................................................................................. 44 2.5.8.7. Scaling Body Load Values ............................................................................................... 44 2.5.8.8. Resolving Conflicting Body Load Specifications .............................................................. 44 2.5.9. Applying Inertia Loads ........................................................................................................... 46 2.5.10. Applying Coupled-Field Loads .............................................................................................. 47 2.5.11. Axisymmetric Loads and Reactions ....................................................................................... 47 2.5.11.1. Hints and Restrictions .................................................................................................. 48 2.5.12. Loads to Which the Degree of Freedom Offers No Resistance ................................................ 48 2.5.13. Initial State Loading .............................................................................................................. 48 2.5.14. Applying Loads Using TABLE Type Array Parameters .............................................................. 49 2.5.14.1. Defining Primary Variables ........................................................................................... 49 2.5.14.2. Defining Independent Variables ................................................................................... 51 2.5.14.3. Operating on Table Parameters .................................................................................... 52 2.5.14.4. Verifying Boundary Conditions ..................................................................................... 52 2.5.14.5. Example Analysis Using 1-D Table Array ........................................................................ 52 2.5.14.6. Example Analysis Using 5-D Table Array ........................................................................ 52 2.6. Specifying Load Step Options ......................................................................................................... 55 2.6.1. Setting General Options ......................................................................................................... 55 2.6.1.1. Solution Controls Dialog Box ......................................................................................... 55 2.6.1.2. The Time Option ............................................................................................................ 55 2.6.1.3. Number of Substeps and Time Step Size ......................................................................... 55 2.6.1.4. Automatic Time Stepping .............................................................................................. 56 2.6.1.5. Stepping or Ramping Loads ........................................................................................... 56 2.6.1.6. Other General Options ................................................................................................... 58 2.6.2. Setting Dynamics Options ...................................................................................................... 59 2.6.3. Setting Nonlinear Options ...................................................................................................... 60 2.6.4. Setting Output Controls ......................................................................................................... 60 2.6.5. Setting Biot-Savart Options .................................................................................................... 62 2.6.6. Setting Spectrum Options ...................................................................................................... 62 2.7. Creating Multiple Load Step Files .................................................................................................... 62 2.8. Defining Pretension in a Joint Fastener ............................................................................................ 64 2.8.1. Applying Pretension to a Fastener Meshed as a Single Piece .................................................... 64 2.8.2. Applying Pretension to a Fastener Meshed as Two Pieces ........................................................ 64 2.8.3. Example Pretension Analysis .................................................................................................. 65 2.8.4. Example Pretension Analysis (GUI Method) ............................................................................. 69 2.8.4.1. Set the Analysis Title ...................................................................................................... 69 2.8.4.2. Define the Element Type ................................................................................................ 69 Release 13.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information of ANSYS, Inc. and its subsidiaries and affiliates.
2.8.4.3. Define Material Properties ............................................................................................. 70 2.8.4.4. Set Viewing Options ...................................................................................................... 70 2.8.4.5. Create Geometry ........................................................................................................... 71 2.8.4.6. Mesh Geometry ............................................................................................................. 72 2.8.4.7. Solution: Apply Pretension ............................................................................................. 73 2.8.4.8. Postprocessing: Pretension Results ................................................................................. 73 2.8.4.9. Solution: Apply Thermal Gradient ................................................................................... 73 2.8.4.10. Postprocessing: Pretension and Thermal Results ........................................................... 74 2.8.4.11. Exit ANSYS ................................................................................................................... 74 3. Using the Function Tool ........................................................................................................................ 75 3.1. Function Tool Terminology .............................................................................................................. 75 3.2. Using the Function Editor ................................................................................................................ 76 3.2.1. How the Function Editor Works ............................................................................................... 76 3.2.1.1. Selecting Primary Variables in the Function Editor .......................................................... 77 3.2.2. Creating a Function with the Function Editor .......................................................................... 78 3.2.3. Using Your Function ............................................................................................................... 78 3.3. Using the Function Loader .............................................................................................................. 79 3.4. Applying Boundary Conditions Using the Function Tool ................................................................... 79 3.5. Function Tool Example .................................................................................................................... 79 3.6. Graphing or Listing a Function ....................................................................................................... 84 3.6.1. Graphing a Function ............................................................................................................... 85 3.6.2. Listing a Function .................................................................................................................. 85 4. Initial State ............................................................................................................................................ 87 4.1. Specifying and Editing Initial State Values ........................................................................................ 87 4.2. Initial State Element Support ........................................................................................................... 88 4.3. Initial State Application ................................................................................................................... 88 4.3.1. Initial Stress Application ......................................................................................................... 88 4.3.2. Initial Strain Application ......................................................................................................... 89 4.3.3. Initial Plastic Strain Application ............................................................................................... 89 4.4. Initial State File Format .................................................................................................................... 90 4.5. Using Coordinate Systems with Initial State ..................................................................................... 91 4.6. Initial State Limitations .................................................................................................................... 91 4.7. Example Problems Using Initial State ............................................................................................... 91 4.7.1. Example: Initial Stress Problem Using the IST File ..................................................................... 91 4.7.2. Example: Initial Stress Problem Using the INISTATE Command ................................................. 93 4.7.3. Example: Initial Strain Problem Using the INISTATE Command ................................................. 93 4.7.4. Example: Initial Plastic Strain Problem Using the INISTATE Command ....................................... 94 4.8. Writing Initial State Values ............................................................................................................... 95 4.8.1. Example: Output From the INISTATE Command's WRITE Option ............................................... 95 5. Solution ................................................................................................................................................. 97 5.1. Selecting a Solver ........................................................................................................................... 97 5.2. Types of Solvers .............................................................................................................................. 99 5.2.1. The Sparse Direct Solver ......................................................................................................... 99 5.2.1.1. Distributed Sparse Direct Solver ................................................................................... 100 5.2.2. The Preconditioned Conjugate Gradient (PCG) Solver ............................................................ 101 5.2.3. The Jacobi Conjugate Gradient (JCG) Solver .......................................................................... 102 5.2.4. The Incomplete Cholesky Conjugate Gradient (ICCG) Solver .................................................. 103 5.2.5. The Quasi-Minimal Residual (QMR) Solver ............................................................................. 103 5.2.6.The Algebraic Multigrid (AMG) Solver .................................................................................... 103 5.3. Solver Memory and Performance .................................................................................................. 103 5.3.1. Running ANSYS Solvers under Shared Memory ..................................................................... 104 5.3.2. Using ANSYS' Large Memory Capabilities with the Sparse Solver ........................................... 104 Release 13.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information of ANSYS, Inc. and its subsidiaries and affiliates. ANSYS Mechanical APDL Basic Analysis Guide v
- Page 1 and 2: ANSYS Mechanical APDL Basic Analysi
- Page 3: Table of Contents 1. Getting Starte
- Page 7 and 8: 7.2.1.6. Particle Flow and Charged
- Page 9 and 10: 10. Getting Started with Graphics .
- Page 11 and 12: 13.2.4.1.Turning Load Symbols and C
- Page 13 and 14: 20.8. Reviewing Contents of Binary
- Page 15 and 16: List of Tables 2.1. DOF Constraints
- Page 17 and 18: Chapter 1: Getting Started with ANS
- Page 19 and 20: shown below define two element type
- Page 21 and 22: You can choose constant, isotropic,
- Page 23 and 24: You can save linear material proper
- Page 25 and 26: Figure 1.4 Material Model Interface
- Page 27 and 28: Figure 1.7 Data Input Dialog Box -
- Page 29 and 30: The first example below is intended
- Page 31 and 32: 9. Click on OK. The dialog box clos
- Page 33 and 34: 1.1.4.9. Reading a Material Library
- Page 35 and 36: If you are performing a static or f
- Page 37 and 38: Chapter 2: Loading The primary obje
- Page 39 and 40: Figure 2.2 Transient Load History C
- Page 41 and 42: The arc-length method is an advance
- Page 43 and 44: • Transferred solid loads will re
- Page 45 and 46: Note If the node rotation angles th
- Page 47 and 48: Figure 2.7 Scaling Temperature Cons
- Page 49 and 50: Below are examples of some of the G
- Page 51 and 52: Utility Menu> List> Loads> Surface>
- Page 53 and 54: Figure 2.9 Example of Surface Load
2.8.4.3. Define Material Properties ............................................................................................. 70<br />
2.8.4.4. Set Viewing Options ...................................................................................................... 70<br />
2.8.4.5. Create Geometry ........................................................................................................... 71<br />
2.8.4.6. Mesh Geometry ............................................................................................................. 72<br />
2.8.4.7. Solution: Apply Pretension ............................................................................................. 73<br />
2.8.4.8. Postprocessing: Pretension Results ................................................................................. 73<br />
2.8.4.9. Solution: Apply Thermal Gradient ................................................................................... 73<br />
2.8.4.10. Postprocessing: Pretension and Thermal Results ........................................................... 74<br />
2.8.4.11. Exit ANSYS ................................................................................................................... 74<br />
3. Using the Function Tool ........................................................................................................................ 75<br />
3.1. Function Tool Terminology .............................................................................................................. 75<br />
3.2. Using the Function Editor ................................................................................................................ 76<br />
3.2.1. How the Function Editor Works ............................................................................................... 76<br />
3.2.1.1. Selecting Primary Variables in the Function Editor .......................................................... 77<br />
3.2.2. Creating a Function with the Function Editor .......................................................................... 78<br />
3.2.3. Using Your Function ............................................................................................................... 78<br />
3.3. Using the Function Loader .............................................................................................................. 79<br />
3.4. Applying Boundary Conditions Using the Function Tool ................................................................... 79<br />
3.5. Function Tool Example .................................................................................................................... 79<br />
3.6. Graphing or Listing a Function ....................................................................................................... 84<br />
3.6.1. Graphing a Function ............................................................................................................... 85<br />
3.6.2. Listing a Function .................................................................................................................. 85<br />
4. Initial State ............................................................................................................................................ 87<br />
4.1. Specifying and Editing Initial State Values ........................................................................................ 87<br />
4.2. Initial State Element Support ........................................................................................................... 88<br />
4.3. Initial State Application ................................................................................................................... 88<br />
4.3.1. Initial Stress Application ......................................................................................................... 88<br />
4.3.2. Initial Strain Application ......................................................................................................... 89<br />
4.3.3. Initial Plastic Strain Application ............................................................................................... 89<br />
4.4. Initial State File Format .................................................................................................................... 90<br />
4.5. Using Coordinate Systems with Initial State ..................................................................................... 91<br />
4.6. Initial State Limitations .................................................................................................................... 91<br />
4.7. Example Problems Using Initial State ............................................................................................... 91<br />
4.7.1. Example: Initial Stress Problem Using the IST File ..................................................................... 91<br />
4.7.2. Example: Initial Stress Problem Using the INISTATE Command ................................................. 93<br />
4.7.3. Example: Initial Strain Problem Using the INISTATE Command ................................................. 93<br />
4.7.4. Example: Initial Plastic Strain Problem Using the INISTATE Command ....................................... 94<br />
4.8. Writing Initial State Values ............................................................................................................... 95<br />
4.8.1. Example: Output From the INISTATE Command's WRITE Option ............................................... 95<br />
5. Solution ................................................................................................................................................. 97<br />
5.1. Selecting a Solver ........................................................................................................................... 97<br />
5.2. Types of Solvers .............................................................................................................................. 99<br />
5.2.1. The Sparse Direct Solver ......................................................................................................... 99<br />
5.2.1.1. Distributed Sparse Direct Solver ................................................................................... 100<br />
5.2.2. The Preconditioned Conjugate Gradient (PCG) Solver ............................................................ 101<br />
5.2.3. The Jacobi Conjugate Gradient (JCG) Solver .......................................................................... 102<br />
5.2.4. The Incomplete Cholesky Conjugate Gradient (ICCG) Solver .................................................. 103<br />
5.2.5. The Quasi-Minimal Residual (QMR) Solver ............................................................................. 103<br />
5.2.6.The Algebraic Multigrid (AMG) Solver .................................................................................... 103<br />
5.3. Solver Memory and Performance .................................................................................................. 103<br />
5.3.1. Running ANSYS Solvers under Shared Memory ..................................................................... 104<br />
5.3.2. Using ANSYS' Large Memory Capabilities with the Sparse Solver ........................................... 104<br />
Release 13.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information<br />
of ANSYS, Inc. and its subsidiaries and affiliates.<br />
ANSYS <strong>Mechanical</strong> <strong>APDL</strong> <strong>Basic</strong> <strong>Analysis</strong> <strong>Guide</strong><br />
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