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ANSYS Fundamentals

ANSYS Fundamentals. This document contains no technical data subject to the EAR or the ITAR. How to Start Ansys and Product Launcher. Start > Programs > ANSYS > Interactive. 1. License Type:. 2. File Management Tab. 1. 3. Working Directory text box. 4. Job name text box. 2. 3. 4.

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ANSYS Fundamentals

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  1. ANSYS Fundamentals This document contains no technical data subject to the EAR or the ITAR.

  2. How to Start Ansys and Product Launcher Start > Programs > ANSYS > Interactive 1 License Type: 2 File Management Tab 1 3 Working Directory text box 4 Job name text box 2 3 4 • This page contains no technical data subject to the EAR or the ITAR.

  3. Product Launcher - Configuration 1 Manual memory settings Graphic device hardware acceleration 2 1 2 • This page contains no technical data subject to the EAR or the ITAR.

  4. GUI 1 Input Line 2 3 4 2 Raise/Hidden Icon 1 3 Contact Manager Icon 4 Utility Menu 5 Graphics Area 7 6 Main Menu 6 7 Model Control Toolbar 1 User Prompt Info 8 Current Settings 9 10 Output Window 5 10 2 8 9 Note: Closing the output window will end the ANSYS session! • This page contains no technical data subject to the EAR or the ITAR.

  5. GUI • Dialog boxes may have both Apply and OK buttons. • Apply performs the action, but does not close the dialog box for repeated use. • OK performs the action and closes the dialog box. 1 2 2 1 • This page contains no technical data subject to the EAR or the ITAR.

  6. Files ANSYS database: all data ANSYS keeps in memory as model is build, solved, and postprocessed. SAVE command: copies the database from memory to a file called the database file (or db file). Utility Menu > File > Save as Jobname.db Utility Menu > File > Save as… RESUME command: restore the database from the db file back into memory Utility Menu > File > Resume Jobname.db Utility Menu > File > Resume from… • This page contains no technical data subject to the EAR or the ITAR.

  7. Files Erasing everything in memory • To reset ANSYS and start a new database select : • Utility Menu > File > Clear & Start New • Or use the /CLEAR command. 1 1 • This page contains no technical data subject to the EAR or the ITAR.

  8. Online Help To start the help system use one of the following options: • Launcher > Product Help • Utility Menu > Help > Help Topics • Any dialog box > Help • Type HELP,name in the Input Window. Name is a command or element name. 1 2 3 2 3 1 • This page contains no technical data subject to the EAR or the ITAR.

  9. Online Help • Type HELP, PLANE42 for help on structural plane element • This page contains no technical data subject to the EAR or the ITAR.

  10. Plotting To display entities on the graphic area and visualize the model. Util Menu > Plot Plot keypoints 1 1 2 Plot Lines 2 3 4 3 Plot Areas 4 Plot Volumes 5 6 5 Plot Nodes 6 Plot Elements • This page contains no technical data subject to the EAR or the ITAR.

  11. Practice 1 • Practice 1 will show how to: • Lunch Ansys • Load a db file • Navigate the menu • Call the help system • Plot geometric entities: lines, areas, volumes • Instructions found in Practice-1.pptx • This page contains no technical data subject to the EAR or the ITAR.

  12. Select Logic Select Logic allows selection of a subset of entities and operate only on those entities. • Three step process: • Subset selected • Operation performed on subset • Full set reactivated 1 2 Util Menu > Select > Entities Type of entity to select 1 2 Selection criteria 3 Type of selection 3 • This page contains no technical data subject to the EAR or the ITAR.

  13. Select Logic • Selection types: • From Full: selects a subset from the full set of entities. • Reselect: selects (again) a subset from the current subset. • Also Select: adds another subset to the current subset. • Unselect: deactivates a portion of the current subset. • Invert: toggles the active and inactive subsets. • Select None: deactivates the full set of entities. • Select All: reactivates the full set of entities. From Full Reselect Also Select Unselect Invert Select None Select All • This page contains no technical data subject to the EAR or the ITAR.

  14. Components • Components are user-named subsets of entities. • The name can then be used in dialog boxes or as arguments to commands. • A group of nodes, or elements, or keypoints, or lines, or areas, or volumes can be defined as a component. • Only one entity type is associated with a component. • Components can be selected or unselected. When you select a component, you are actually selecting all of the entities in that component. • Component Manager can be accessed from: • Util Menu > Select > Component Manager • This page contains no technical data subject to the EAR or the ITAR.

  15. Picking • Picking existing entities to perform an operation. • Picker window allows to enter entity numbers directly. • All entities can be picked with the Pick All button. • Mouse button assignments for picking: • Leftmouse button picks (or unpicks) the entity or location closest to the mouse pointer. Pressing and dragging allows you to “preview” the item being picked (or unpicked). • Middle mouse button does an Apply. Saves the time required to move the mouse over to the Picker and press the Apply button. Use Shift-Right button on a two-button mouse. • Right mouse button toggles between pick and unpick mode. • This page contains no technical data subject to the EAR or the ITAR.

  16. Picking • Pick hotspot locations: • Areas and Volumes have a hotspot near the centroid of the solid model entity. • Lines have three hotspots - one in the middle and one near each end. • When you are required to “pick” an entity, you must pick on the hotspot. • This page contains no technical data subject to the EAR or the ITAR.

  17. Work Plane • Working Plane - a movable, 2-D reference plane used to locate keypoints. • Default position of the WP origin is the global origin. It can be moved or rotated as needed. • WP defined by the XY plane. WP is infinite. • To position the WP use Util Menu > WorkPlane > Offset WP by Increments Translate Rotate • This page contains no technical data subject to the EAR or the ITAR.

  18. Coordinate Systems • Types of Coordinate systems: • Global and local coordinate systems: used to locate geometry entities(nodes, keypoints, etc.) • Display coordinate system: determines the system in which geometry items are listed or displayed. • The nodal coordinate system: defines the degree of freedom directions at each node. • The element coordinate system: determines the orientation of material properties. • The results coordinate system: used to transform nodal or element results data to a particular coordinate system for listings, displays, or general postprocessing. • This page contains no technical data subject to the EAR or the ITAR.

  19. Coordinate Systems • Global Coordinate System • The global reference system for the model. • Can be se to Cartesian (csys,0), cylindrical (csys,1), or spherical (csys,2). • Global coordinate systems can not be changes are always available. • To change the coordinate system use the command csys,”coordinate id” csys,0 csys,1 csys,2 • This page contains no technical data subject to the EAR or the ITAR.

  20. Y Y X X Coordinate Systems • Local Coordinate System • A user-defined coordinate system at a specified location. Coordinate system ID should be 11 or greater. • Several ways to define: • At WorkPlane origin • At specified coordinates • At existing keypoints or nodes • Can be Cartesian, cylindrical, or spherical. • Can be rotated about X, Y, Z axes. CSYS,12 Y X CSYS,0 CSYS,11 • This page contains no technical data subject to the EAR or the ITAR.

  21. Practice 2 • Practice 2 will show how to: • Pick entities • Manipulate the WorkPlane • Define an manipulate Coordinate systems • Perform Selections • Component creation • Instructions found in Practice-2.pptx • This page contains no technical data subject to the EAR or the ITAR.

  22. Solid Modeling • Solid Modeling: the process of creating solid models. • Definitions: • A solid model is defined by volumes, areas, lines, and keypoints. • Volumes are bounded by areas, areas by lines, and lines by keypoints. • Hierarchy of entities: from low to high: • Lower  Higher • keypoints < lines < areas < volumes • Cannot delete/remove an entity that belongs to a higher-order entity. Volume Area Line Keypoint • This page contains no technical data subject to the EAR or the ITAR.

  23. Geometry Creation • Top Down: Using Boolean operations with volumes (or areas) create the final shape. V1 – V2  V1 V2 • This page contains no technical data subject to the EAR or the ITAR.

  24. Geometry Creation • Bottom Up: starts with keypoints, from which shapes are “build up” Kepoints  Lines  Area • This page contains no technical data subject to the EAR or the ITAR.

  25. Element Type Definition Main Menu > Preprocessor > Add/Edit/Delete > Click to show Element types available 1 Select element type 2 3 Select element shape 3 2 1 • This page contains no technical data subject to the EAR or the ITAR.

  26. Material Properties Definition Main Menu > Preprocessor > Material Models Click to Material Model number 1 Select Structural (linear/nonlinear/etc) 2 Select isotropic 3 Enter properties 4 1 2 3 4 • This page contains no technical data subject to the EAR or the ITAR.

  27. Meshing Main Menu > Preprocessor > Meshing > Mesh Tool 1 The mesh tool consists of a collections of commands required to generate a mesh. 2 Attributes Controls 1 Smart Size Controls 2 Local Size Controls 3 3 Meshing Controls 4 Refinement Controls 5 4 4 5 • This page contains no technical data subject to the EAR or the ITAR.

  28. Meshing Main Menu > Preprocessor > Meshing > Mesh Tool 2 1 To assign predefined element type, real constants, material, sections, Select Element Attributes drop down menu. 1 From the options select geometric entity to apply the attribute. 2 Select Set 3 Select Type to apply to the area 4 Select Material to apply to the area 5 Select OK to apply attribute 4 3 4 5 • This page contains no technical data subject to the EAR or the ITAR.

  29. Meshing Main Menu > Preprocessor > Meshing > Mesh Tool 1 To assign size controls select entity 2 Select the Set button next to Lines label Select lines to apply size control 3 Specify number of divisions 4 1 2 Select OK to apply size control 5 Applied line divisions 6 4 3 4 5 6 • This page contains no technical data subject to the EAR or the ITAR.

  30. Meshing (mapped) Main Menu > Preprocessor > Meshing > Mesh Tool 1 To apply mesh controls select entity from drop down menu 2 Select Area option Select mapped mesh 3 Select area to mesh 4 Resulting mesh 5 2 1 3 4 4 5 • This page contains no technical data subject to the EAR or the ITAR.

  31. Meshing (free) Main Menu > Preprocessor > Meshing > Mesh Tool 1 To apply mesh controls select entity from drop down menu 2 Select Area option Select free mesh 3 Select area to mesh 4 Resulting mesh 5 2 1 3 4 4 5 • This page contains no technical data subject to the EAR or the ITAR.

  32. Loads (Force) Main Menu > Preprocessor > Loads > Define Loads > Apply > Structural > Force/Moment > On Nodes 1 Select nodes to apply the forces 2 Select force direction Specify force magnitude 3 2 Select OK to apply force 4 Resulting applied forces 3 5 4 1 5 • This page contains no technical data subject to the EAR or the ITAR.

  33. Loads (Displacement) Main Menu > Preprocessor > Loads > Define Loads > Apply > Structural > Displacements > On Nodes 1 Select nodes to apply the displacement 2 Select DOF to specify Specify displacement value 3 2 Select OK to apply displacement 4 Resulting applied displacements 3 5 4 5 1 1 5 • This page contains no technical data subject to the EAR or the ITAR.

  34. Solution Main Menu > Solution > Analysis Type > New Analysis Click Static 1 1 • This page contains no technical data subject to the EAR or the ITAR.

  35. Solution Main Menu > Solution > Solve > Current LS Click OK to start solution. 1 1 • This page contains no technical data subject to the EAR or the ITAR.

  36. General Postprocessor Main Menu > General Postprocessor > Read Results > First Set Main Menu > General Postprocessor > Plot Results > Contour Plot > Nodal Solution Click on Displacement vector sum 1 1 • This page contains no technical data subject to the EAR or the ITAR.

  37. Practice 3 • Practice 3 will show how to: • Define geometry • Define element types • Define material properties • Define boundary conditions • Define loads • Solve the model • Review results • Instructions found in Practice-3.pptx • This page contains no technical data subject to the EAR or the ITAR.

  38. Practice 4 • Practice 4 will show how to: • Use axisymmetric PLANE42 element for stress analysis of a turbine disk • Instructions found in Practice-4.pptx • This page contains no technical data subject to the EAR or the ITAR.

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