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Growing multiblock structures: a semi-automated approach to block placement for multiblock hexahedral meshing

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Listed:
  • Austin Ramme
  • Kiran Shivanna
  • Amy Criswell
  • Nicole Kallemeyn
  • Vincent Magnotta
  • Nicole Grosland

Abstract

Finite element (FE) analysis is a cornerstone of orthopaedic biomechanics research. Three-dimensional medical imaging provides sufficient resolution for the subject-specific FE models to be generated from these data-sets. FE model development requires discretisation of a three-dimensional domain, which can be the most time-consuming component of a FE study. Hexahedral meshing tools based on the multiblock method currently rely on the manual placement of building blocks for mesh generation. We hypothesise that angular analysis of the geometric centreline for a three-dimensional surface could be used to automatically generate building block structures for the multiblock hexahedral mesh generation. Our algorithm uses a set of user-defined points and parameters to automatically generate a multiblock structure based on a surface's geometric centreline. This significantly reduces the time required for model development. We have applied this algorithm to 47 bones of varying geometries and successfully generated a FE mesh in all cases. This work represents significant advancement in automatically generating multiblock structures for a wide range of geometries.

Suggested Citation

  • Austin Ramme & Kiran Shivanna & Amy Criswell & Nicole Kallemeyn & Vincent Magnotta & Nicole Grosland, 2012. "Growing multiblock structures: a semi-automated approach to block placement for multiblock hexahedral meshing," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 15(10), pages 1043-1052.
  • Handle: RePEc:taf:gcmbxx:v:15:y:2012:i:10:p:1043-1052
    DOI: 10.1080/10255842.2011.570338
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