M10MAE Computer Aided Engineering

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M10MAE Computer Aided Engineering
Shell Meshing Example Using Hypermesh
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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
• Filegtimportgtgeometrygtiges
• Use filter to recognise surface features (
  toggle fixed points)

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Step 1 Import Geometry Initial Inspection
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Step 2 Auto Clean up function Parameter File
GeometrygtAuto Cleanup
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Step 2 Auto Clean up function Parameter File
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Step 3 Manual Geometry Clean Up General
Quick Geometry Edit (F11)
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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 menugt Multipoints gt Delete to
  delete all the redundant points on the surface

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

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Step 4 Auto Mesh Criteria File
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Step 4 Auto Mesh Criteria File
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Step 5 Revision of Mesh Quality Quality Index
Uses the Criteria file
2Dgt Quality Index
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Step 6 Edges Normals Panels. Tools Panel
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Step 7 Element Manipulation
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Step 8 Final Mesh Element Clean Up Panel
Bypasses the Criteria file