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M10MAE Computer Aided Engineering

M10MAE Computer Aided Engineering. Shell Meshing Example Using Hypermesh. Introduction. The aim of this tutorial is to present the features necessary to generate an adequate crash mesh Start HyperMesh using the Optistruct template Input the Iges file longit.igs

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M10MAE Computer Aided Engineering

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  1. M10MAE Computer Aided Engineering Shell Meshing Example Using Hypermesh

  2. Introduction • The aim of this tutorial is to present the features necessary to generate an adequate crash mesh • Start HyperMesh using the Optistruct template • Input the Iges file longit.igs • File>import>geometry>iges • Use filter to recognise surface features (+ toggle fixed points)

  3. Step 1 – Import Geometry & Initial Inspection

  4. Step 2 – Auto Clean up function & Parameter File Geometry>Auto Cleanup

  5. Step 2 – Auto Clean up function & Parameter File

  6. Step 3 – Manual Geometry Clean Up General Quick Geometry Edit (F11)

  7. Step 3 – Manual Geometry Clean Up General • A point will force the mesh to lock on it, which can distort the mesh • Removing points give better control • Use the Point Edit menu> Multipoints > Delete to delete all the redundant points on the surface

  8. Step 3 – Manual Geometry Clean Up Panels Geometry Clean Up Panels

  9. Step 3 – Manual Geometry Clean Up Panels Geometry Clean Up Panels F11 short-cut RMB separates LMB fuses MMB leave

  10. Step 4 – Auto Mesh & Criteria File • Use AutoMesh (F12) and select the square icon as mesh type (will generate fewer triangles) • Select QI Optimised, which uses the parameters in the Criteria file • Compare with Standard Bias: what is the difference in mesh quality? (F10)

  11. Step 4 – Auto Mesh & Criteria File

  12. Time Step Calculations Mesh Requirements Step 4 – Auto Mesh & Criteria File

  13. Step 5 – Revision of Mesh Quality – Quality Index Uses the Criteria file 2D> Quality Index

  14. Step 6 – Edges & Normals Panels. Tools Panel

  15. Step 7 – Element Manipulation Quality Index Delete (F2) Combine (F6) Replace (F3) Project (Shift+F4) Split (F6) Distance (F4) Align (F7)

  16. Step 8 – Final Mesh Element Clean Up Panel Bypasses the Criteria file

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