Skull fracture can be a complex process involving various types of bone microstructure. Finite element analysis of the microscopic architecture in the bone allows for a controlled evaluation of the stress wave interactions, micro-crack growth, propagation and eventual coalescence of trabecular fracture. In this paper, the microstructure and mechanics of small-volume sections of a 6-month-old Gottingen Minipig skull were analyzed. MicroCT scans were used to generate finite element models. Various computational methods were investigated for modeling the intricacies contained within the porous microstructure of the trabecular bone. Pores were explicitly meshed in one method, whereas in the second, a mesh was created from a microCT image-informed mapping algorithm that mapped the trabecular porosity from an image stack to a solid volume mesh of the model. From here, all models were subject to uniaxial compression simulations. The output of the simulations allowed for a detailed understanding of the failure mechanics of the skull structure and allowed for comparison between the methods. Fracture typically occurs in the weakest areas where the bone is highly porous and forms a fracture surface throughout the material, which causes the bone to collapse upon itself.
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ASME 2015 International Mechanical Engineering Congress and Exposition
November 13–19, 2015
Houston, Texas, USA
Conference Sponsors:
- ASME
ISBN:
978-0-7918-5738-0
PROCEEDINGS PAPER
Microstructural Analysis of Porcine Skull Bone Subjected to Impact Loading
Allison N. Ranslow,
Allison N. Ranslow
Pennsylvania State University, University Park, PA
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Reuben H. Kraft,
Reuben H. Kraft
Pennsylvania State University, University Park, PA
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Ryan Shannon,
Ryan Shannon
Pennsylvania State University, University Park, PA
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Patricia De Tomas-Medina,
Patricia De Tomas-Medina
Pennsylvania State University, University Park, PA
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Raul Radovitsky,
Raul Radovitsky
MIT Institute for Soldier Nanotechnologies, Cambridge, MA
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Aurelie Jean,
Aurelie Jean
MIT Institute for Soldier Nanotechnologies, Cambridge, MA
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Martin Pierre Hautefeuille,
Martin Pierre Hautefeuille
MIT Institute for Soldier Nanotechnologies, Cambridge, MA
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Brian Fagan,
Brian Fagan
MIT Institute for Soldier Nanotechnologies, Cambridge, MA
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Kimberly A. Ziegler,
Kimberly A. Ziegler
United States Army Research Laboratory, Aberdeen Proving Ground, MD
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Tusit Weerasooriya,
Tusit Weerasooriya
United States Army Research Laboratory, Aberdeen Proving Ground, MD
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Ann Mae Dileonardi,
Ann Mae Dileonardi
United States Army Research Laboratory, Aberdeen Proving Ground, MD
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Allan Gunnarsson,
Allan Gunnarsson
United States Army Research Laboratory, Aberdeen Proving Ground, MD
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Sikhanda Satapathy
Sikhanda Satapathy
United States Army Research Laboratory, Aberdeen Proving Ground, MD
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Allison N. Ranslow
Pennsylvania State University, University Park, PA
Reuben H. Kraft
Pennsylvania State University, University Park, PA
Ryan Shannon
Pennsylvania State University, University Park, PA
Patricia De Tomas-Medina
Pennsylvania State University, University Park, PA
Raul Radovitsky
MIT Institute for Soldier Nanotechnologies, Cambridge, MA
Aurelie Jean
MIT Institute for Soldier Nanotechnologies, Cambridge, MA
Martin Pierre Hautefeuille
MIT Institute for Soldier Nanotechnologies, Cambridge, MA
Brian Fagan
MIT Institute for Soldier Nanotechnologies, Cambridge, MA
Kimberly A. Ziegler
United States Army Research Laboratory, Aberdeen Proving Ground, MD
Tusit Weerasooriya
United States Army Research Laboratory, Aberdeen Proving Ground, MD
Ann Mae Dileonardi
United States Army Research Laboratory, Aberdeen Proving Ground, MD
Allan Gunnarsson
United States Army Research Laboratory, Aberdeen Proving Ground, MD
Sikhanda Satapathy
United States Army Research Laboratory, Aberdeen Proving Ground, MD
Paper No:
IMECE2015-51979, V003T03A057; 10 pages
Published Online:
March 7, 2016
Citation
Ranslow, AN, Kraft, RH, Shannon, R, De Tomas-Medina, P, Radovitsky, R, Jean, A, Hautefeuille, MP, Fagan, B, Ziegler, KA, Weerasooriya, T, Dileonardi, AM, Gunnarsson, A, & Satapathy, S. "Microstructural Analysis of Porcine Skull Bone Subjected to Impact Loading." Proceedings of the ASME 2015 International Mechanical Engineering Congress and Exposition. Volume 3: Biomedical and Biotechnology Engineering. Houston, Texas, USA. November 13–19, 2015. V003T03A057. ASME. https://doi.org/10.1115/IMECE2015-51979
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