Copyright ® 2000 MSC.Software Results S10-1 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation WORKSHOP 10 ADVANCED SURFACE MESHER

Copyright ® 2000 MSC.Software Results S10-2 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation

Copyright ® 2000 MSC.Software Results S10-3 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation ADVANCED SURFACE MESHER n Advanced Surface Mesher (ASM) Capabilities u Handles complex surface models u Non-congruencies l Gaps l Overlaps l Slivers l Small edges Provides optional global and local editing tools to accommodate meshing specific requirements

Copyright ® 2000 MSC.Software Results S10-4 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation ADVANCED SURFACE MESHER n Advanced Surface Mesher (ASM) n Create tessellated surfaces first, possibly stitching (making congruent) adjacent edges that are free ParametricBiCubic Surfaces Tria Meshes Tessellated Surfaces

Copyright ® 2000 MSC.Software Results S10-5 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation ADVANCED SURFACE MESHER n ASM Capabilities (Cont.) u Automatic and manual tools for set of tessellated surfaces l Auto stitch to close gaps using a tolerance l Fill gaps using curves/edges l Make congruent by merging vertices l Merge using tolerance angles l Fill holes with surfaces l Add vertex on surface edges l Delete vertex from surface edges l Split surface into two surfaces l Collapse curve to eliminate a surface edge l Merge (add) surfaces l Recognize features l Support hard points and hard curves l Hard nodes, hard bars, and soft bars

Copyright ® 2000 MSC.Software Results S10-6 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation n Benefits u Drastically reduce analysis modeling time l The part (see surfaces) can now be meshed in less than a minute l With other methods it would take at least 30 minutes u Build quality finite element models with minimal user interaction u Increased productivity Gap Non-congruent surface edges ASM BENEFITS

Copyright ® 2000 MSC.Software Results S10-7 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation n Import a set of non-congruent surfaces u File: Import/IGES u Select file set_noncongruent_surfaces.igs u Import to Parasolid, Yes u Apply u Change view to Iso 1 View. u Display the entire model in viewport using Fit view icon. CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-8 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation n Find free surface edges u Geometry: Verify/Surface/Boundary u Select all surfaces u Apply u Magenta circles are shown on free surface edges CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-9 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation n Find the free surface edges using the ASM u Finite Elements: Create/Mesh/Adv. Surface l Cleanup l Verify l Clear CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-10 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Create the initial tessellated surfaces u Finite Elements: Create/Mesh/Adv. Surface l Select all geometric surfaces l Use default initial element size of l Use default gap tolerance of 0.1 l Click Apply Create Surfaces

Copyright ® 2000 MSC.Software Results S10-11 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES Parametric and Trimmed Surfaces Tria Meshes Tessellated Surfaces

Copyright ® 2000 MSC.Software Results S10-12 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES Determine the attributes of several surfaces All surfaces are tessellated, but some have an underlying trimmed surface. Treat surfaces as tessellated.

Copyright ® 2000 MSC.Software Results S10-13 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation n Find free surface edges again u Finite Elements: Create/Mesh/Adv. Surface l Cleanup l AutoStitch l Verify u Fewer magenta circles shown on surface edges because of stitching l Clear CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES Cleanup

Copyright ® 2000 MSC.Software Results S10-14 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Stitch more surfaces together using a tolerance u Select all tessellated surfaces u Use a gap tolerance of 0.25 u Click Apply u Click Verify u Click Clear

Copyright ® 2000 MSC.Software Results S10-15 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Fill the large gap with a sliver surface using Edit/Fill Hole u Select an edge at the large gap u Click Apply u Click Verify

Copyright ® 2000 MSC.Software Results S10-16 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Fill the large gap with a sliver surface using Edit/Fill Hole (continued) u Observe new Surface 49

Copyright ® 2000 MSC.Software Results S10-17 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Merge Surface 49 with an adjacent surface using Edit/Merge Surfaces u Select Surface 49 and Surface 46

Copyright ® 2000 MSC.Software Results S10-18 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-19 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Use Edit/Auto Merge to merge some surfaces using different parameters u Select all the surfaces u Select only parameter Feature Angle l Use the default value of 15.0 o u Apply u See the results on the next page u UNDO

Copyright ® 2000 MSC.Software Results S10-20 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Results where flat (*) u Angle < 15.0 o, edges merged n Results where curved (**) u Angle > 15.0 o, edges not merged * ** *

Copyright ® 2000 MSC.Software Results S10-21 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Focus on two surfaces where the angle is > 15.0 o n Determine the approximate value of the angle n Suggestion: 1) create a point at parametric (0.5, 0.5) for each surface, 2) create a coord system for each surface with Z-dir normal to surface, 3) create a curve for each coord system, 4) copy one curve to the other, and 5) determine the angle.

Copyright ® 2000 MSC.Software Results S10-22 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Use Edit/Auto Merge to merge some surfaces using different parameters (continued) u Select all the surfaces u Select only parameter Feature Angle l Use new value of 50.0 o u Apply u See the results on the next page

Copyright ® 2000 MSC.Software Results S10-23 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Use Edit/Auto Merge to merge some surfaces using different parameters (continued) u The surfaces have been merged, and the long arc edge has been preserved, which will effect subsequent meshing

Copyright ® 2000 MSC.Software Results S10-24 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Use Edit/Merge Surfaces to merge some surfaces u Select three surfaces u Apply

Copyright ® 2000 MSC.Software Results S10-25 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-26 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Use Edit/Merge Surfaces to merge some more surfaces u Select five surfaces u Apply

Copyright ® 2000 MSC.Software Results S10-27 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-28 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Use Edit/Fill Hole to create surfaces to fill holes, then merge the resulting surfaces with the surrounding surfaces u Select the surface with the two holes u Specify the maximum hole radius as 5 u Apply

Copyright ® 2000 MSC.Software Results S10-29 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-30 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Delete unnecessary vertices using Edit/Delete Point u Display point marker symbols u Select all the surfaces u Use the default value for the vertex angle u Apply

Copyright ® 2000 MSC.Software Results S10-31 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-32 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-33 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation n Create final mesh with quad elements u Select all surfaces u Select quad topology u Specify final element size as 5.0 u Apply CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES Final Mesh

Copyright ® 2000 MSC.Software Results S10-34 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-35 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Re-do this case study, but this time divide the surfaces differently u Close the MSC.Patran database u Create a new database u Import the file with the surfaces l set_noncongruent_surfaces.igs u Create the initial tessellated surfaces as shown on the next page

Copyright ® 2000 MSC.Software Results S10-36 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Create the initial tessellated surfaces u Finite Elements: Create/Mesh/Adv. Surface l Select all geometric surfaces l Use default initial element size of l Use default gap tolerance of 0.1 l Click Apply Create Surfaces

Copyright ® 2000 MSC.Software Results S10-37 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Stitch more surfaces together using a tolerance u Select all tessellated surfaces u Use a gap tolerance of 0.25 u Click Apply u Click Verify u Click Clear

Copyright ® 2000 MSC.Software Results S10-38 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Stitch more surfaces together using select surface edges u Select all edges around the large gap u Click Apply u Click Verify

Copyright ® 2000 MSC.Software Results S10-39 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-40 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Use Edit/Fill Hole to create surfaces to fill holes, then merge the resulting surfaces with the surrounding surfaces u Select the two surfaces with a hole u Specify the maximum hole radius as 5 u Apply

Copyright ® 2000 MSC.Software Results S10-41 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-42 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Merge the set of surfaces into four surfaces n Do the first collection of surfaces

Copyright ® 2000 MSC.Software Results S10-43 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-44 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Merge the set of surfaces into four surfaces (continued) n Do the second collection of surfaces

Copyright ® 2000 MSC.Software Results S10-45 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-46 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Merge the set of surfaces into four surfaces (continued) n Do the third collection of surfaces u First, divide two surfaces l Project a point onto two surface edges

Copyright ® 2000 MSC.Software Results S10-47 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-48 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Merge the set of surfaces into four surfaces (continued) n Do the third collection of surfaces u First, divide two surfaces (continued) l Create a plane using the three points that were just created

Copyright ® 2000 MSC.Software Results S10-49 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-50 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Merge the set of surfaces into four surfaces (continued) n Do the third collection of surfaces u First, divide two surfaces (continued) l Break two surfaces with the plane that was just created

Copyright ® 2000 MSC.Software Results S10-51 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-52 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Merge the set of surfaces into four surfaces (continued) n Do the third collection of surfaces u Now, create four tessellated surfaces from the four green surfaces just created by breaking with a plane

Copyright ® 2000 MSC.Software Results S10-53 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-54 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Merge the set of surfaces into four surfaces (continued) n Do the third collection of surfaces

Copyright ® 2000 MSC.Software Results S10-55 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-56 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Merge the set of surfaces into four surfaces (continued) n Do the fourth collection of surfaces

Copyright ® 2000 MSC.Software Results S10-57 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-58 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n Delete unnecessary vertices using Edit/Delete Point u Display point marker symbols u Select all the surfaces u Use the default value for the vertex angle u Apply

Copyright ® 2000 MSC.Software Results S10-59 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-60 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES n ASM mesh all the tessellated surfaces

Copyright ® 2000 MSC.Software Results S10-61 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation CASE STUDY: ASM EXAMPLE TESSELLATED SURFACES

Copyright ® 2000 MSC.Software Results S10-62 PAT328, Workshop 10, May 2005 Copyright 2005 MSC.Software Corporation