Emerson, N.J., Carre, M.J. orcid.org/0000-0003-3622-990X, Reilly, G.C. orcid.org/0000-0003-1456-1071 et al. (1 more author) (2011) Geometrically accurate 3D FE models from medical scans created to analyse the causes of sports injuries. Procedia Engineering, 13. pp. 422-427. ISSN 1877-7058
Abstract
Development of Finite Element (FE) modelling techniques has allowed the creation of 3D models based upon high resolution Computed Tomography (CT) images, which have been used to assess the mechanical properties of bone, fixation techniques, and the performance of bone micro-architecture. In this study, a semi-automated process for converting CT data into FE models has been used to investigate if the automated geometry and material properties mapping of mid-shaft cortical bone. In order to develop the process, a porcine femoral specimen was imaged with a spiral CT scanner, allowing the semi-automated creation of a 3D FE model. Inhomogeneous material properties were mapped using the Bonemat algorithm which allows automated adjustment of values from CT data. The 3D model was cropped at the start of each metaphyseal region to isolate the mid-shaft region for testing. Hand calculation of the mid-shaft was undertaken using a composite ellipse solution, which allowed the direction and magnitude of the maximum stresses, and the deflection occurring within the bone mid-shaft to be analysed with respect to the results obtained within the finite element testing. Predictions from the ellipse method correlated significantly well with the stress patterns and maximum deflections achieved within the 3D FE model, validating the modelling process for future testing. Using CT-derived FE analysis to determine failure mechanisms has great potential for use as a tool in fracture analysis. The increased geometrical accuracy has potential for use within Sports Injuries studies, where the inherent complexity of skeletal modelling and multi-factor loading conditions can often lead to errors in simplified solutions. Further understanding of failure mechanisms such as these can be used to influence the design of sports equipment and surfaces, helping to prevent sports injuries in the future.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2011 Published by Elsevier Ltd. Open access under CC BY-NC-ND license. |
Keywords: | Finite element; mechanical model; torsion; bone; porcine; femur |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Mechanical Engineering (Sheffield) The University of Sheffield > Faculty of Medicine, Dentistry and Health (Sheffield) > Department of Human Metabolism (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 13 Apr 2016 11:54 |
Last Modified: | 13 Apr 2016 11:54 |
Published Version: | http://dx.doi.org/10.1016/j.proeng.2011.05.108 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.proeng.2011.05.108 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:98052 |