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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/14238

Title: Fracture process in cortical bone: X-FEM analysis of microstructured models
Authors: Li, Simin
Abdel-Wahab, Adel A.
Demirci, Emrah
Silberschmidt, Vadim V.
Keywords: X-FEM
Microstructured model
Crack propagation
Fracture toughening mechanisms
Issue Date: 2013
Publisher: © Springer Science and Business Media
Citation: LI, S. ... et al, 2013. Fracture process in cortical bone: X-FEM analysis of microstructured models. International Journal of Fracture, 184 (1-2), pp. 43 - 55
Abstract: Bones tissues are heterogeneous materials that consist of various microstructural features at different length scales. The fracture process in cortical bone is affected significantly by the microstructural constituents and their heterogeneous distribution. Understanding mechanics of bone fracture is necessary for reduction and prevention of risks related to bone fracture. The aim of this study is to develop a finite-element approach to evaluate the fracture process in cortical bone at micro-scale. In this study, three microstructural models with various random distributions based on statistical realizations were constructed using the global model's framework together with a submodelling technique to investigate the effect of microstructural features on macroscopic fracture toughness and microscopic crack-propagation behaviour. Analysis of processes of crack initiation and propagation utilized the extended finite-element method using energy-based cohesive-segment scheme. The obtained results were compared with our experimental data and observations and demonstrated good agreement. Additionally, the microstructured cortical bone models adequately captured various damage and toughening mechanisms observed in experiments. The studies of crack length and fracture propagation elucidated the effect of microstructural constituents and their mechanical properties on the microscopic fracture propagation process. © 2013 Springer Science+Business Media Dordrecht.
Description: This article was published in the serial International Journal of Fracture [© Springer Science and Business Media]. The definitive version is available at: http://dx.doi.org/10.1007/s10704-013-9814-7
Sponsor: The authors acknowledge the financial support from EPSRC UK [grant no. EP/G048886/1].
Version: Accepted for publication
DOI: 10.1007/s10704-013-9814-7
URI: https://dspace.lboro.ac.uk/2134/14238
Publisher Link: http://dx.doi.org/10.1007/s10704-013-9814-7
ISSN: 0376-9429
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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