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dc.contributor.authorMc Donnell, Patricia E.
dc.contributor.authorHarrison, Noel
dc.contributor.authorLohfeld, Stefan
dc.contributor.authorKennedy, Oran
dc.contributor.authorZhang, Y.
dc.contributor.authorMcHugh, Peter E.
dc.date.accessioned2018-10-11T08:31:09Z
dc.date.available2018-10-11T08:31:09Z
dc.date.issued2009-04-05
dc.identifier.citationMc Donnell, P., Harrison, N., Lohfeld, S., Kennedy, O., Zhang, Y., & Mc Hugh, P. E. (2010). Investigation of the mechanical interaction of the trabecular core with an external shell using rapid prototype and finite element models. Journal of the Mechanical Behavior of Biomedical Materials, 3(1), 63-76. doi: https://doi.org/10.1016/j.jmbbm.2009.03.002en_IE
dc.identifier.issn1878-0180
dc.identifier.urihttp://hdl.handle.net/10379/14596
dc.description.abstractThe mechanical properties of vertebral bone have been widely studied with the ultimate goal of improving fracture risk prediction. However, the mechanical interaction between the cortical shell and the trabecular core is not well understood. The objective of this study was to investigate this interaction and to determine what effect it has on the ultimate strength of the whole bone. This objective was achieved by compression testing rapid prototype (RP) models of cylindrical trabecular bone cores, with and without an integral surrounding shell and incorporating increasing levels of artificially induced bone loss. Corresponding finite element (FE) models were generated and the load sharing of the shell and trabecular core was analysed under linear elastic loading conditions. The results of the physical RP model tests and corresponding FE analyses indicated that there was a reinforcing effect between the cortical shell and the trabecular core for all models tested and that the reinforcing effect became relatively more important to the ultimate strength of the whole bone as the bone volume fraction of the trabecular core decreased. It was found that two mechanisms contributed to the reinforcing effect: (i) load transfer from the highly stressed shell into the connecting outer trabeculae of the core for the shelled model. This did not occur for the un-shelled model where the load dropped off at the outer unsupported trabeculae; (ii) the stiffening effect on the shell due to the support provided by the connecting struts of the trabecular core, which serves to inhibit bending and buckling behaviour in the shell under compression loading. It was found that the stiffening on the shell was the more dominant contributor to the overall reinforcing effect between the shell and the trabecular core. (C) 2009 Elsevier Ltd. All rights reserved.en_IE
dc.description.sponsorshipThis work is part of the Bone for Life project, funded by the Programme for Research in Third Level Institutions (PRTLI), administered by the Higher Education Authority in Ireland. The authors wish to acknowledge the SFI/HEA Irish Centre for High-End Computing (ICHEC) for the provision of computational facilities and support.en_IE
dc.formatapplication/pdfen_IE
dc.language.isoenen_IE
dc.publisherElsevieren_IE
dc.relation.ispartofJournal Of The Mechanical Behavior Of Biomedical Materialsen
dc.subjectHUMAN VERTEBRAL BODYen_IE
dc.subjectBONE VOLUME FRACTIONen_IE
dc.subjectCANCELLOUS BONEen_IE
dc.subjectUNIAXIAL COMPRESSIONen_IE
dc.subjectMICRO ARCHITECTUREen_IE
dc.subjectELASTIC-MODULUSen_IE
dc.subjectCORTICAL SHELLen_IE
dc.subjectANATOMIC SITEen_IE
dc.subjectSTRENGTHen_IE
dc.subjectDEPENDENCEen_IE
dc.titleInvestigation of the mechanical interaction of the trabecular core with an external shell using rapid prototype and finite element modelsen_IE
dc.typeArticleen_IE
dc.date.updated2017-02-14T11:42:09Z
dc.identifier.doi10.1016/j.jmbbm.2009.03.002
dc.local.publishedsourcehttps://doi.org/10.1016/j.jmbbm.2009.03.002en_IE
dc.description.peer-reviewedpeer-reviewed
dc.internal.rssid1337131
dc.local.contactStefan Lohfeld, Mechanical & Biomedical Eng, Engineering Building Eng-1042, Nui Galway. 2963 Email: stefan.lohfeld@nuigalway.ie
dc.local.copyrightcheckedYes
dc.local.versionPUBLISHED
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