Abaqus Instructor NamHo Kim nkimufledu Abaqus Basics Simulation Abaqus Standard Output file Jobodb jobdat Postprocessing Abaqus CAE Preprocessing Abaqus CAE Interactive Mode ID: 1002077
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1. Finite Element AnalysisUsing AbaqusInstructor: Nam-Ho Kim (nkim@ufl.edu)
2. Abaqus BasicsSimulationAbaqus/StandardOutput file:Job.odb, job.datPostprocessingAbaqus/CAEPreprocessingAbaqus/CAEInteractive ModeAnalysis Input fileInput file (text):Job.inpFEM Solver
3. Methods of Analysis in ABAQUSInteractive modeCreate an FE model and analysis using GUIAdvantage: Automatic discretization and no need to remember commandsDisadvantage: No automatic procedures for changing model or parametersPython scriptAll GUI user actions will be saved as Python scriptAdvantage: Users can repeat the same command procedureDisadvantage: Need to learn Python script language
4. Methods of Analysis in ABAQUSAnalysis input fileABAQUS solver reads an analysis input filePossible to manually create an analysis input file Advantage: Users can change model directly without GUIDisadvantage: Users have to discretize model and learn ABAQUS input file grammar
5. Components in ABAQUS ModelGeometry modeling (define geometry)Creating nodes and elements (discretization)Element section properties (area, moment of inertia, etc)Material data (linear/nonlinear, elastic/plastic, isotropic/orthotropic, etc)Loads and boundary conditions (nodal force, pressure, gravity, fixed displacement, joint, relation, etc)Analysis type (linear/nonlinear, static/dynamic, etc)Output requests
6. FEM Modeling
7. FEM ModelingPressureWhich analysis type?Which element type?Section propertiesMaterial propertiesLoads and boundary conditionsOutput requestsBeam elementSolid element
8. Line (Beam element) - Assign section properties (area, moment of inertia) - Assign material propertiesVolume (Solid element) - Assign section properties - Assign material propertiesFEM Modeling
9. FEM ModelingLine (Beam element) - Apply distributed load “on the line” - Apply fixed BC “at the point”Volume (Solid element) - Apply distribution load “on the surface” - Apply fixed BC “on the surface”fixed BCfixed BC
10. FEM ModelingLine (Beam element) - Discretized geometry with beam element - Discretized BC and load on nodesVolume (Solid element) - Discretized geometry with solid element - Discretized BC and load on nodes
11. Start Abaqus/CAEStartup window
12. Example: Overhead Hoist
13. UnitsQuantitySISI (mm)US Unit (ft)US Unit (inch)LengthmmmftinForceNNlbflbfMasskgtonne (103 kg)sluglbf s2/inTimessssStressPa (N/m2)MPa (N/mm2)lbf/ft2psi (lbf/in2)EnergyJmJ (10–3 J)ft lbfin lbfDensitykg/m3tonne/mm3slug/ft3lbf s2/in4Abaqus does not have built-in unitsUsers must use consistent units
14. Create PartPartsCreate 2D Planar, Deformable, Wire, Approx size = 4.0Provide complete constrains and dimensionsMerge duplicate points
15. Geometry ConstraintDefine exact geometryAdd constraintsAdd dimensionOver constraint warning
16. Geometry ModificationModify geometry modeling1. Go back to the sketch2. Update geometry
17. Define Material PropertiesMaterialsName: SteelMechanicalElasticityElastic
18. Define Section PropertiesCalculate cross-sectional area using CLI (diameter = 5mm)SectionsName: Circular_SectionBeam, TrussChoose material (Steel)Write area
19. Define Section PropertiesAssign the section to the partSection AssignmentsSelect all wiresAssign Circular_Section
20. Assembly and Analysis StepDifferent parts can be assembled in a modelSingle assembly per modelAssemblyInstances: Choose the frame wireframeAnalysis StepConfiguring analysis procedureStepsName: Apply LoadType: Linear perturbationChoose Static, Linear perturbation
21. Assembly and Analysis StepExamine Field Output Request (automatically requested)User can change the request
22. Boundary ConditionsBoundary conditions: Displacements or rotations are knownBCsName: FixedStep: InitialCategory: MechanicalType: Displacement/RotationChoose lower-left pointSelect U1 and U2Repeat for lower-right cornerFix U2 only
23. Applied LoadsLoadsName: ForceStep: Applied LoadCategory: MechanicalType: Concentrated forceChoose lower-center pointCF2 = -10000.0
24. Meshing the ModelPartsPart-1, MeshMenu Mesh, Element Types (side menu )Select all wireframesLibrary: StandardOrder: LinearFamily: TrussT2D2: 2-node linear 2-D truss
25. Meshing the ModelSeed a meshControl how to mesh (element size, etc)Menu Seed, Part (side menu )Global size = 1.0Menu Mesh, Part, Yes (side menu )Menu View, Part Display OptionLabel on
26. Mesh ModificationMenu Seed, Part (side menu )Change the seed size (Global size) 1.0 to 0.5Delete the previous meshMenu Mesh, Part, Yes (side menu )
27. Creating an Analysis JobJobsJobs, TrussData CheckMonitorContinue (or, submit)
28. PostprocessingChange “Model” tab to “Results” tabMenu File, Open Job.odb fileCommon Plot Option (side menu ), click on the Labels tab (Show element labels, Show node labels)Set Font for All Model Labels…
29. PostprocessingDeformation scaleCommon Plot Option (side menu ), click on the Basic tab, Deformation Scale Factor area
30. PostprocessingTools, XY Data, ManagerPosition: Integration PointStress components, S11 (Try with displacements and reaction)
31. PostprocessingClick on the Elements/Nodes tabSelect Element/Nodes you want to see result and saveClick Edit… to see the result
32. PostprocessingReport, Field OutputPosition: Integration PointStress components, S11 (Try with displacements and reaction)Default report file name is “abaqus.rpt”The report file is generated in “C:\temp” folder
33. SaveSave job.cae fileMenu, File, Save As… - job.cae file is saved - job.jnl file is saved as well (user action history, python code)