Difference between revisions of "Hex vs Tet Mesh Comparisons"

From NAMIC Wiki
Jump to: navigation, search
 
Line 23: Line 23:
 
***mesh quality
 
***mesh quality
 
***Results of a static load analysis versus the number of elements
 
***Results of a static load analysis versus the number of elements
'''To Do:'''
+
'''Pulbication:'''
* Evaluate other tetrahedral meshing algorithms
+
*Devries NA, Shivanna KH, Tadepalli SC, Magnotta VA, Grosland NM. [http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2723692/pdf/iowa0029-0048.pdf Ia-FEMesh: anatomic fe models--a check of mesh accuracy and validity]. Iowa Orthop J. 29:48-54, 2009
* Complete comparison study of hexahedral and tetrahedral tools.
 
* Direct conversion of hexahedral meshes into tetrahedral meshes using VTK
 
  
 
'''Key Investigators:'''
 
'''Key Investigators:'''

Latest revision as of 18:23, 20 January 2010

Home < Hex vs Tet Mesh Comparisons

Objective:

  • Comparison of Hexahedral versus Tetrahedral meshing algorithms Orthopaedic applications

Progress:

  • Currently evaluating open source tetrahedral meshing algorithms
    • VTK
      • Slivers exist in resulting mesh
    • Netgen
      • LGPL license
      • Issues have been found regarding invalid memory references
      • Does not always converge to a solution
      • Difficult to specify desired mesh density
    • Tetgen
      • Non commercial license. Commercial license can be purchased
      • Has been used for medical applications including heart, vertebral body, and head meshes
  • Performed an initial comparison of hexahedral versus tetrahedral algorithms
    • Study included comparison of hexahedral and tetrahedral meshing tools
    • Evaluated the results based the following criteria
      • Time to generate the mesh
      • mesh quality
      • Results of a static load analysis versus the number of elements

Pulbication:

Key Investigators:

  • Iowa: Nicole DeVries, Nicole Grosland, Vincent Magnotta

Links:


Images:

The von Mises stress distribution for the various meshing techniques: IA-FEMesh (a) hexahedral mesh, (b) NETGEN tetrahedral mesh, and PATRAN (c) hexahedral mesh, (d) tetrahedral mesh with average element length of 1mm, and (e) tetrahedral mesh with average element length of 2mm.