ANSYS Composite PrepPost User's Guide - Portal de

370 Pages·2013·12.04 MB·English

ANSYS Composite PrepPost User's Guide
ANSYS, Inc. Release 15.0
Southpointe November 2013
275 Technology Drive
Canonsburg, PA 15317 ANSYS, Inc. is
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9001:2008.
http://www.ansys.com
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Table of Contents
1. Installation and Licensing....................................................................................................................... 1
1.1. Installation ....................................................................................................................................... 1
1.1.1.Windows.................................................................................................................................. 1
1.1.1.1. Interactive Installation..................................................................................................... 1
1.1.1.2. Silent Installation............................................................................................................. 4
1.1.2. Linux ....................................................................................................................................... 4
1.1.3. ANSYS Update (SP and Subversion).......................................................................................... 5
1.2. Licensing.......................................................................................................................................... 5
1.2.1. License for ANSYS Composite PrepPost..................................................................................... 5
1.2.2. License for the ANSYS Solver.................................................................................................... 5
2. Getting Started....................................................................................................................................... 7
2.1. Overview of ACP............................................................................................................................... 7
2.1.1. Introduction ............................................................................................................................ 7
2.1.2. Principle .................................................................................................................................. 7
2.1.3. First Steps................................................................................................................................ 9
2.2.Tutorials and Examples..................................................................................................................... 9
2.2.1.Tutorial 1: First Steps............................................................................................................... 10
2.2.2.Tutorial 2: Advanced Use of ACP.............................................................................................. 10
2.2.3. Example: Class40.................................................................................................................... 10
2.2.4. Example:T-Joint..................................................................................................................... 11
2.2.5. Example: Kiteboard................................................................................................................ 11
2.3. Analysis of a Composite Shell Model................................................................................................ 12
2.3.1. Pre-processing....................................................................................................................... 13
2.3.1.1.Workbench Integration.................................................................................................. 13
2.3.1.2. Adding ACP Components to the Project......................................................................... 13
2.3.1.3. Engineering Data (ED)................................................................................................... 14
2.3.1.4. Properties ..................................................................................................................... 14
2.3.1.5. Geometry and Units...................................................................................................... 16
2.3.1.6. Named Selections and Elements/Edge Sets.................................................................... 16
2.3.1.7. Starting and Running ACP............................................................................................. 16
2.3.2.Workbench Analysis System................................................................................................... 17
2.3.2.1. Adding an Analysis System to the Project....................................................................... 17
2.3.3. Post-processing...................................................................................................................... 18
2.3.3.1. Adding an ACP (Post) Component to the Project............................................................ 18
2.4. Analysis of a Composite Solid Model............................................................................................... 21
2.4.1. Pre-processing....................................................................................................................... 22
2.4.2.Workbench Analysis System................................................................................................... 22
2.4.3. Post-processing...................................................................................................................... 26
2.5.WB Workflow Examples................................................................................................................... 28
2.5.1. Single Analysis Extended........................................................................................................ 29
2.5.2. Multiple Load-cases and Analyses........................................................................................... 30
2.5.3. Shared Composite Definition for Different Models.................................................................. 30
2.6. Stand-Alone Operation................................................................................................................... 31
2.6.1. Starting ACP .......................................................................................................................... 31
2.6.2. Command line options and batch mode................................................................................. 31
2.6.3.Workflow in Stand Alone Operation........................................................................................ 32
2.7. Migration from Previous Versions.................................................................................................... 35
2.7.1. Migrate ACP Projects from v14.5 to 15.0.................................................................................. 36
2.7.2. Migrate ACP Projects from v14.0 to 14.5.................................................................................. 36
2.7.3. Migrate ACP Projects from v13.0 to 14.0.................................................................................. 36
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2.8. Graphical User Interface.................................................................................................................. 41
2.8.1. Layout Modification............................................................................................................... 41
2.8.2. Menu..................................................................................................................................... 42
2.8.2.1. File................................................................................................................................ 42
2.8.2.1.1.Workbench Integration......................................................................................... 42
2.8.2.1.2. Stand-Alone ......................................................................................................... 42
2.8.2.2.View.............................................................................................................................. 43
2.8.2.2.1. Perspectives ......................................................................................................... 44
2.8.2.2.2.View Manager and Other....................................................................................... 44
2.8.2.3.Tools ............................................................................................................................. 45
2.8.2.3.1. Logger Level......................................................................................................... 45
2.8.2.3.2. ACP Preferences.................................................................................................... 45
2.8.2.3.3. ACP Submenus..................................................................................................... 46
2.8.2.3.3.1. Scene........................................................................................................... 47
2.8.2.3.3.2. Appearance ................................................................................................. 47
2.8.2.3.3.3. Screenshot .................................................................................................. 48
2.8.2.3.3.4. Interaction................................................................................................... 48
2.8.2.4. Help.............................................................................................................................. 49
2.8.3.Tree View............................................................................................................................... 49
2.8.4. Scene..................................................................................................................................... 51
2.8.5.Toolbar .................................................................................................................................. 51
2.8.5.1. Scene Manipulation....................................................................................................... 51
2.8.5.2. Mesh Appearance.......................................................................................................... 52
2.8.5.3. Orientation Visualization................................................................................................ 52
2.8.5.4. Draping and Flat Wrap................................................................................................... 54
2.8.5.5. Other Features............................................................................................................... 56
2.8.5.6. Post-processing............................................................................................................. 57
2.8.5.7. Updates ........................................................................................................................ 57
2.8.6. Shell View.............................................................................................................................. 57
2.8.7. History View........................................................................................................................... 57
2.8.8. Logger................................................................................................................................... 57
3. Composite Model Techniques............................................................................................................... 59
3.1.T-Joint............................................................................................................................................ 59
3.2. Local Reinforcements...................................................................................................................... 69
3.3. Ply Tapering and Staggering............................................................................................................ 71
3.3.1. Ply Tapering........................................................................................................................... 71
3.3.2. Ply Staggering........................................................................................................................ 74
3.4.Variable Core Thickness................................................................................................................... 75
3.4.1. Solid CAD Geometry.............................................................................................................. 75
3.4.2. Look-Up Table........................................................................................................................ 77
3.4.3. Geometry Cutoff Rule............................................................................................................. 78
3.4.4. General Application ............................................................................................................... 80
3.5. Draping.......................................................................................................................................... 80
3.5.1. Internal Draping Algorithm of ACP.......................................................................................... 80
3.5.2. User-Defined Draping ............................................................................................................ 82
3.5.3.Visualization........................................................................................................................... 84
3.6. Ply Book......................................................................................................................................... 85
3.7. Guide to Solid Modeling................................................................................................................. 87
3.7.1.When to use a Solid Model..................................................................................................... 88
3.7.2. How to use the Solid Model Feature........................................................................................ 88
3.7.3. Principle of the Solid Model Generation.................................................................................. 89
3.7.4.Workflow ............................................................................................................................... 89
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3.7.5. Practical Tips.......................................................................................................................... 90
3.7.6. Known Limitations................................................................................................................. 90
3.8. Guide to Composite Visualizations.................................................................................................. 91
3.8.1. Model Verification.................................................................................................................. 91
3.8.2. Post-processing visualizations................................................................................................ 93
3.9. Element Choice in ACP.................................................................................................................... 99
3.9.1. Introduction........................................................................................................................... 99
3.9.2. Shell Elements...................................................................................................................... 100
3.9.3. Solid Elements ..................................................................................................................... 100
3.9.4. Solid Shell Elements............................................................................................................. 100
4. Usage Reference.................................................................................................................................. 101
4.1. Features........................................................................................................................................ 101
4.1.1. Model.................................................................................................................................. 101
4.1.2. Material Data ....................................................................................................................... 108
4.1.3. Element and Edge Sets......................................................................................................... 125
4.1.4. CAD Geometries................................................................................................................... 127
4.1.5. Rosettes............................................................................................................................... 129
4.1.6. Look-up Tables..................................................................................................................... 134
4.1.7. Rules.................................................................................................................................... 137
4.1.8. Oriented Element Sets (OES)................................................................................................. 144
4.1.9. Modeling Ply Groups............................................................................................................ 149
4.1.9.1. Ply Group Structure..................................................................................................... 149
4.1.9.2. Modeling Ply Group Context Menu.............................................................................. 150
4.1.9.3. Ply Group Context Menu.............................................................................................. 150
4.1.9.4. Modeling Ply Properties............................................................................................... 151
4.1.9.4.1. Draping .............................................................................................................. 152
4.1.9.4.2. Rules .................................................................................................................. 153
4.1.9.4.3.Thickness............................................................................................................ 154
4.1.9.4.4. Modeling Ply Context Menu................................................................................ 157
4.1.9.5. Interface Layer Properties............................................................................................ 159
4.1.9.6. Production Ply............................................................................................................. 160
4.1.9.7. Analysis Ply.................................................................................................................. 160
4.1.9.8. Import from / Export to CSV Files................................................................................. 161
4.1.9.9. Export Ply Geometry.................................................................................................... 161
4.1.10. Analysis Ply Groups............................................................................................................ 163
4.1.11. Sampling Elements............................................................................................................. 163
4.1.12. Section Cuts....................................................................................................................... 165
4.1.13. Sensors .............................................................................................................................. 167
4.1.14. Solid Models ...................................................................................................................... 168
4.1.14.1. Solid Model Properties - General................................................................................ 169
4.1.14.1.1. Element Sets..................................................................................................... 169
4.1.14.1.2. Extrusion Method ............................................................................................. 170
4.1.14.1.3. Connect Butt-Jointed Plies................................................................................ 171
4.1.14.1.4. Drop-Off Method.............................................................................................. 171
4.1.14.1.5. Offset Direction................................................................................................. 172
4.1.14.1.6. Drop-Off Element Handling............................................................................... 173
4.1.14.1.7. Element Quality................................................................................................ 174
4.1.14.2. Solid Model Properties - Export.................................................................................. 175
4.1.14.2.1. Use Solsh Elements........................................................................................... 175
4.1.14.2.2. Use Solid Model Prefix....................................................................................... 175
4.1.14.2.3.Transferred Sets................................................................................................. 175
4.1.14.2.4. Numbering Offset............................................................................................. 176
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4.1.14.3. Extrusion Guides........................................................................................................ 177
4.1.14.3.1. Mesh Morphing................................................................................................ 179
4.1.14.3.2. Curvature Control ............................................................................................. 180
4.1.14.3.3. Extrusion Guide Examples................................................................................. 181
4.1.14.4. Snap to Geometry...................................................................................................... 182
4.1.14.5. Export Solid Model..................................................................................................... 185
4.1.14.6. Save & reload Solid Models........................................................................................ 185
4.1.15. Layup Plots ........................................................................................................................ 185
4.1.16. Definitions ......................................................................................................................... 188
4.1.17. Solutions............................................................................................................................ 190
4.1.17.1. Solution..................................................................................................................... 191
4.1.17.1.1. Solution Properties ........................................................................................... 192
4.1.17.1.2. Name................................................................................................................ 192
4.1.17.1.3. Format.............................................................................................................. 192
4.1.17.1.4. Paths ................................................................................................................ 193
4.1.17.1.5. Data Set............................................................................................................ 193
4.1.17.1.6. Solid Model Post-Processing.............................................................................. 193
4.1.17.2. Envelope Solution...................................................................................................... 194
4.1.17.3. Solution Plots............................................................................................................ 195
4.1.18. Scenes ............................................................................................................................... 198
4.1.19.Views ................................................................................................................................. 200
4.1.20. Ply Book............................................................................................................................. 200
4.1.21. Parameters......................................................................................................................... 202
4.1.22. Material Databank.............................................................................................................. 205
4.2. Postprocessing ............................................................................................................................. 206
4.2.1. Failure Criteria...................................................................................................................... 206
4.2.2. Failure Mode Measures......................................................................................................... 207
4.2.3. Principal Strains and Stresses................................................................................................ 207
4.2.4. Limitations & Recommendations.......................................................................................... 207
4.3. Available Interfaces to FE Packages................................................................................................ 207
4.3.1. ANSYS.................................................................................................................................. 207
4.3.2. ESAComp............................................................................................................................. 212
4.3.3. CSV Files .............................................................................................................................. 213
4.3.4. HDF5 ................................................................................................................................... 214
4.3.5. LS-Dyna............................................................................................................................... 215
4.4. FAQ .............................................................................................................................................. 215
5.Theory Documentation....................................................................................................................... 219
5.1. Nomenclature............................................................................................................................... 219
5.2. Draping Simulation....................................................................................................................... 221
5.2.1. Introduction......................................................................................................................... 221
5.2.2. Draping Procedure............................................................................................................... 222
5.2.3. Implemented Energy Algorithm........................................................................................... 223
5.2.4. Limitations of Draping Simulations....................................................................................... 225
5.3. Interlaminar Stresses..................................................................................................................... 225
5.3.1. Introduction......................................................................................................................... 225
5.3.2. Interlaminar normal stresses................................................................................................. 225
5.3.2.1. Analytical model.......................................................................................................... 225
5.3.2.2. Reference Coordinates................................................................................................. 228
5.3.2.3. Numeric solution......................................................................................................... 228
5.3.3.Transverse shear stresses...................................................................................................... 229
5.4. Failure Analysis............................................................................................................................. 231
5.4.1. Reserve factor...................................................................................................................... 231
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5.4.2.Weighting factors................................................................................................................. 232
5.4.3. Failure Criterion Function..................................................................................................... 232
5.4.4. Failure Criteria for Reinforced Materials................................................................................. 233
5.4.4.1. Maximum Strain Criterion............................................................................................ 233
5.4.4.2. Maximum Stress Criterion............................................................................................ 233
5.4.4.3. Quadratic Failure Criteria............................................................................................. 234
5.4.4.3.1.Tsai-Wu Failure Criterion...................................................................................... 234
5.4.4.3.2.Tsai-Hill Failure Criterion...................................................................................... 236
5.4.4.3.3. Hoffman Failure Criterion.................................................................................... 236
5.4.4.4. Hashin Failure Criterion................................................................................................ 237
5.4.4.5. Puck Failure Criteria..................................................................................................... 238
5.4.4.5.1. Simple and Modified Puck Criterion..................................................................... 238
5.4.4.5.2. Puck's action plane strength criterion.................................................................. 238
5.4.4.5.2.1. Fiber Failure (FF)......................................................................................... 238
5.4.4.5.2.2. Inter-fiber failure (IFF)................................................................................. 239
5.4.4.6. LaRC Failure Criterion................................................................................................... 243
5.4.4.6.1. LaRC03/LaRC04 Constants................................................................................... 243
5.4.4.6.2. General Expressions............................................................................................ 244
5.4.4.6.3. LaRC03 (2D)........................................................................................................ 247
5.4.4.6.4. LaRC04 (3D)........................................................................................................ 248
5.4.4.7. Cuntze's Failure Criterion............................................................................................. 249
5.4.4.7.1. 2D Failures.......................................................................................................... 249
5.4.4.7.2. 3D Failures.......................................................................................................... 250
5.4.5. Sandwich Failure.................................................................................................................. 251
5.4.5.1. Core failure.................................................................................................................. 251
5.4.5.2. Face sheet wrinkling.................................................................................................... 251
5.4.6. Interlaminar failure............................................................................................................... 253
5.4.7. Isotropic material failure....................................................................................................... 253
5.4.8. Failure Criteria vs. Ply Type Table........................................................................................... 253
5.5. Classical Laminate Theory............................................................................................................. 254
5.5.1. Overview ............................................................................................................................. 254
5.5.2. Analysis................................................................................................................................ 255
5.5.2.1. Laminate Stiffness and Compliance Matrices................................................................ 255
5.5.2.2. Normalized Laminate Stiffness and Compliance Matrices.............................................. 255
5.5.2.3. Laminate Engineering Constants.................................................................................. 256
5.5.2.4. Polar Properties........................................................................................................... 256
5.5.2.5. Analysis Options.......................................................................................................... 257
6.The ACP Python Scripting User Interface............................................................................................ 259
6.1. Introduction to ACP Scripting........................................................................................................ 259
6.2.The Python Object Tree................................................................................................................. 260
6.3. DB Database................................................................................................................................. 261
6.4. Material Classes............................................................................................................................ 262
6.4.1. MaterialData ........................................................................................................................ 262
6.4.2. Materials.............................................................................................................................. 266
6.4.2.1. StressLimits................................................................................................................. 268
6.4.2.2. StrainLimits ................................................................................................................. 268
6.4.2.3. PuckConstants............................................................................................................. 269
6.4.2.4.WovenCharacterization................................................................................................ 269
6.4.2.5.ThermalExpansionCoefficients..................................................................................... 271
6.4.3. Fabric................................................................................................................................... 271
6.4.4. Stackup................................................................................................................................ 272
6.4.5. SubLaminate........................................................................................................................ 274
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6.5. Model Classes............................................................................................................................... 275
6.5.1. Model.................................................................................................................................. 275
6.5.2. Rosette ................................................................................................................................ 293
6.5.3. LookUpTable1D ................................................................................................................... 294
6.5.4. LookUpTable3D.................................................................................................................... 294
6.5.5. ElementRule Classes............................................................................................................. 295
6.5.5.1. ParallelRule.................................................................................................................. 295
6.5.5.2. CylindricalRule............................................................................................................. 295
6.5.5.3. SphericalRule .............................................................................................................. 296
6.5.5.4.TubeRule..................................................................................................................... 296
6.5.5.5. CutoffRule................................................................................................................... 296
6.5.6. EntitySet.............................................................................................................................. 297
6.5.6.1. ElementSet.................................................................................................................. 297
6.5.6.2. EdgeSet....................................................................................................................... 299
6.5.6.3. CADGeometry............................................................................................................. 299
6.5.7. OrientedElementSet............................................................................................................. 300
6.5.8. ModelingPlyGroup............................................................................................................... 302
6.5.9. ModelingPly......................................................................................................................... 305
6.5.10. ProductionPly .................................................................................................................... 309
6.5.11. AnalysisPly......................................................................................................................... 310
6.5.12. SamplingElement............................................................................................................... 311
6.5.13. SectionCut ......................................................................................................................... 313
6.5.14. Sensor................................................................................................................................ 314
6.5.15. PlyBook.............................................................................................................................. 315
6.5.15.1. PlyBook..................................................................................................................... 315
6.5.15.2. Chapter..................................................................................................................... 316
6.6. Solid-model Classes...................................................................................................................... 316
6.6.1. SolidModel........................................................................................................................... 316
6.6.2. ExtrusionGuide .................................................................................................................... 321
6.6.3. SnapToGeometry ................................................................................................................. 321
6.6.4. CutOffGeometry .................................................................................................................. 322
6.7. Solution Classes............................................................................................................................ 322
6.7.1. Solution............................................................................................................................... 322
6.7.2. EnvelopeSolution................................................................................................................. 325
6.8. Scene Classes................................................................................................................................ 325
6.8.1. Scene................................................................................................................................... 325
6.8.2.View..................................................................................................................................... 327
6.9. Postprocessing Definition Classes.................................................................................................. 327
6.9.1. CombinedFailureCriteria....................................................................................................... 327
6.9.2. MaxStressCriterion ............................................................................................................... 328
6.9.3. MaxStrainCriterion ............................................................................................................... 329
6.9.4.TsaiWu ................................................................................................................................. 330
6.9.5.TsaiHill ................................................................................................................................. 330
6.9.6. Hashin ................................................................................................................................. 330
6.9.7. Hoffman .............................................................................................................................. 331
6.9.8. Puck..................................................................................................................................... 331
6.9.9.Wrinkling ............................................................................................................................. 333
6.9.10. CoreShear .......................................................................................................................... 333
6.9.11. Larc.................................................................................................................................... 333
6.9.12. Cuntze ............................................................................................................................... 334
6.9.13.VonMises............................................................................................................................ 335
6.10. Plot............................................................................................................................................. 336
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6.10.1. PlotContainer..................................................................................................................... 336
6.10.1.1. PlotDataDict.............................................................................................................. 336
6.10.1.2. LayupPlotDict............................................................................................................ 339
6.10.1.3. PostProcessingPlotDict .............................................................................................. 340
6.10.2. PlotData............................................................................................................................. 343
6.10.2.1. PlotData .................................................................................................................... 343
6.10.2.2. ContourData.............................................................................................................. 346
6.10.2.3. AngleData ................................................................................................................. 347
6.10.2.4.ThicknessData ........................................................................................................... 347
6.10.2.5. DeformationContourData.......................................................................................... 347
6.10.2.6. StrainData ................................................................................................................. 347
6.10.2.7. StressData ................................................................................................................. 347
6.10.2.8. FailureData................................................................................................................ 348
6.10.2.9.TemperatureData....................................................................................................... 349
Bibliography............................................................................................................................................. 351
Index........................................................................................................................................................ 353
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