Workbench Simulation. Contact Analysis. 1 ANSYS, ANSYS, Inc. Inc. Proprietary

Transcription

1 Workbench Simulation Contact Analysis 1 ANSYS, ANSYS, Inc. Inc. Proprietary

2 Objective and Outline Contact related features available in ANSYS Workbench Contact objects Initial contact status Contact meshing Solution information Contact results Wizards 2 ANSYS, ANSYS, Inc. Inc. Proprietary

3 Workbench Contact Modeling Automatic contact generation for a variety of CAD geometry Various options for specifying contact behavior Associative with geometry changes 3 ANSYS, ANSYS, Inc. Inc. Proprietary

4 Contact Folder: Details Automatic generation based on pair options Disable transparency Rename based on geometry names Tolerance type: a) slider b) numeric value Search sphere size indicator appears in graphics window 4 ANSYS, ANSYS, Inc. Inc. Proprietary

5 Contact Folder: Details Auto detection types: Face/Face Face/Edge Edge/Edge Priority for type during auto generation Joins solid and surface bodies together by defining contact relationship between corresponding faces and edges Automates construction of connections between part, manual effort is sometimes necessary Setting the appropriate priority improves the outcome of the automatic generation, review of generated objects is good practice 5 ANSYS, ANSYS, Inc. Inc. Proprietary

6 Examples of Contact Types Surface body face to surface body edge Solid body edge to surface body edge Surface body edge to surface body edge 6 ANSYS, ANSYS, Inc. Inc. Proprietary

7 Contact Folder: Worksheet View Lists details for each contact object Good for verifying intentions Rows can be sorted by clicking column header 7 ANSYS, ANSYS, Inc. Inc. Proprietary

8 Contact Folder: Worksheet View Columns can be sized by sliding header divider The RMB on the header displays options to add, removed, and reset columns 8 ANSYS, ANSYS, Inc. Inc. Proprietary

9 Contact Object Display Contact side is red Target side is blue 9 ANSYS, ANSYS, Inc. Inc. Proprietary

10 Contact Object Display Click on detail and corresponding part highlights Makes it easy to understand definition 10 ANSYS, ANSYS, Inc. Inc. Proprietary

11 Contact Objects: Transparency Selected contact objects in tree will be shown in graphics window displayed with corresponding parts as more opaque than other parts Transparency can be disabled, level of opaqueness can be adjusted in options 11 ANSYS, ANSYS, Inc. Inc. Proprietary

12 Contact Objects: Object Details Highlight of geometry entities by selection details Symmetry behavior on individual basis, including auto asymmetry Interface treatment Contact stiffness specification and update options (very important for good solution convergence) 12 ANSYS, ANSYS, Inc. Inc. Proprietary

13 Contact Object: RMB Options Disable transparency Flip contact and target Rename based on geometry 13 ANSYS, ANSYS, Inc. Inc. Proprietary

14 Initial Contact Status Available by inserting a contact tool in the contact folder. Initial information result object displays a table of information about the initial state of contact throughout the model 14 ANSYS, ANSYS, Inc. Inc. Proprietary

15 Initial Contact Status Lists useful information such as: 1) Status 2) Number elements contacting 3) Penetration and/or gap (gap is negative) 4) Size of gaps closed Valuable information when setting up contact simulations 15 ANSYS, ANSYS, Inc. Inc. Proprietary

16 Contact Meshing Based on the sphere of influence capability Element size is synchronized across the contact interface 16 ANSYS, ANSYS, Inc. Inc. Proprietary

17 Contact Meshing Contact objects can be drug and dropped 17 ANSYS, ANSYS, Inc. Inc. Proprietary

18 Solution Information Convergence History Result Trackers Newton Raphson Residuals 18 ANSYS, ANSYS, Inc. Inc. Proprietary

19 Convergence History Useful for understanding the solution progress - Solution output text - Force convergence - Max DOF increment - Line search parameter - Time increment 19 ANSYS, ANSYS, Inc. Inc. Proprietary

20 Result Trackers Valuable for know how the model performs with increasing load Available for each contact pair Converged solution data Various types 20 ANSYS, ANSYS, Inc. Inc. Proprietary

21 Result Tracker Types Directional Deformations (x, y, z) Contact Number Contacting Number Sticking Pressure Penetration Gap Frictional Stress Sliding Distance Chattering Elastic Slip Normal Stiffness Max Tangential Stiffness Min Tangential Stiffness Resulting Pinball 21 ANSYS, ANSYS, Inc. Inc. Proprietary

22 Newton Raphson Residuals Objects appear in tree if activated and solution fails to converged Shows regions where convergence is having difficulty, in this case the contact below the washer and the bracket Details 22 ANSYS, ANSYS, Inc. Inc. Proprietary

23 Contact Tool Collected by a parent object Automatic transparency 23 ANSYS, ANSYS, Inc. Inc. Proprietary

24 Contact Results Includes: Frictional stress Pressure Sliding distance Penetration Gap Status Reactions 24 ANSYS, ANSYS, Inc. Inc. Proprietary

25 Contact Tool - Reactions 25 ANSYS, ANSYS, Inc. Inc. Proprietary

26 Command Objects ANSYS macro Multiple instances allowed Can be exported or inserted Parametric output back to WB 26 ANSYS, ANSYS, Inc. Inc. Proprietary

27 Contact in 2D 2D surface bodies Options for plane stress, plain strain, axisymmetry 27 ANSYS, ANSYS, Inc. Inc. Proprietary

28 Contact in 2D Large Deflection 2D Sliding Contact 28 ANSYS, ANSYS, Inc. Inc. Proprietary

29 Contact Custom Wizard Purpose Helps ensure preferred and proven options are used Highlights recommends features 29 ANSYS, ANSYS, Inc. Inc. Proprietary

30 More Contact Features Contact reaction output can be requested in a local coordinate system Contact reactions can be parameters Multiple selection support for Flip Contact/Target Scoping by Named Selections for Contact Regions Penalty based surface body edge contact that includes stiffness for rotational DOF Save/Load contact region settings Reset to default options 30 ANSYS, ANSYS, Inc. Inc. Proprietary

31 More Contact Features Options for collecting topologies for same body pairs Option to merge individual contacts for same body pair (using multi select) 31 ANSYS, ANSYS, Inc. Inc. Proprietary

32 Contact Features ANSYS Workbench Easy to use Wide variety of features Useful results Sophisticated simulation 32 ANSYS, ANSYS, Inc. Inc. Proprietary