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Mark F. Adams H.H. Bayraktar, T.M. Keaveny, P. Papadopoulos and Atul Gupta

Ultrascalable Implicit Finite Element Analyses in Solid Mechanics with over a Half a Billion Degrees of Freedom ( excerpts ). Mark F. Adams H.H. Bayraktar, T.M. Keaveny, P. Papadopoulos and Atul Gupta. Cortical bone. Trabecular bone. Trabecular Bone. 5-mm Cube. Methods: FE modeling.

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Mark F. Adams H.H. Bayraktar, T.M. Keaveny, P. Papadopoulos and Atul Gupta

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  1. Ultrascalable Implicit Finite Element Analyses in Solid Mechanics with over a Half a Billion Degrees of Freedom(excerpts) Mark F. Adams H.H. Bayraktar, T.M. Keaveny, P. Papadopoulos and Atul Gupta

  2. Cortical bone Trabecular bone Trabecular Bone 5-mm Cube

  3. Methods: FE modeling Mechanical Testing E, yield, ult, etc. 3D image FE mesh Micro-Computed Tomography CT @ 22 m resolution 2.5 mm cube 44 m elements

  4. the vertebral body you are showing is pretty healthy from a 80 year old female and it is a T-10 that is thoracic. So it is pretty close to the mid-spine. Usually research is done from T-10 downward to the lumbar vertebral bodies. There are 12 thoracic VB's and 5 lumbar. The numbers go up as you go down.

  5. 1 mm slice from vertebral body

  6. 80 µm w/ shell Vertebral Body With Shell • Large deformation elast. • 6 load steps (3% strain) • Scaled speedup • ~131K dof/processor • 7 to 537 million dof • 4 to 292 nodes • IBM SP Power3 • 14 of 16 procs/node

  7. Computational Architecture Silo DB Silo DB Silo DB Silo DB FE MeshInput File ParMetis Athena Partition to SMPs FE input file(in memory) FE input file(in memory) • Athena: Parallel FE • ParMetis • Parallel Mesh Partitioner (Univerisity of Minnesota) • Prometheus • Multigrid Solver • FEAP • Serial general purpose FE application (University of California) • PETSc • Parallel numerical libraries (Argonne National Labs) ParMetis Athena Athena File File File File FEAP FEAP FEAP FEAP Material Card pFEAP Olympus METIS METIS METIS Prometheus METIS Visit ParMetis PETSc

  8. ParMetis partitions

  9. 131K dof / proc.47 Teraflops - 4088 processors

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