Comparison of the elastic and yield properties of human femoral trabecular and cortical bone tissue

Bayraktar, Harun H.; Morgan, Elise F.; Niebur, Glen L.; Morris, Grayson E.; Wong, Eric; Keaveny, Tony M.

doi:10.1016/s0021-9290(03)00257-4

Cited by 938 publications

(680 citation statements)

References 32 publications

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“…The model determined damage based on a chosen fracture strain, which corresponded to maximum principal strain of 0.6% [22,23] in this case. When the fracture strain was reached, damage initiation started, and then, damage evolution took place.…”

Section: Numerical Models Of Three-point-bending Testmentioning

confidence: 99%

Analysis of fracture processes in cortical bone tissue

Abdel-Wahab

Silberschmidt

2013

Engineering Fracture Mechanics

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Bones are the principal structural components of a skeleton; they play unique roles in the body providing its shape maintenance, protection of internal organs and transmission of forces. Ultimately, their structural integrity is vital for the quality of life.Unfortunately, bones can only sustain loads until a certain limit, beyond which they fail. Understanding a fracture behaviour of bone is necessary for prevention and diagnosis of trauma; this can be achieved by studying mechanical properties of bone, such as its fracture toughness. Generally, most of bone fractures occur in long bones consisting mostly of cortical bone tissue. Therefore, in this paper, an experimental study and numerical simulations of fracture processes in a bovine femoral cortical bone tissue were considered. A set of experiments was conducted to characterise fracture toughness of the bone tissue in order to gain basic understanding of spatial variability and anisotropy of its resistance to fracture and its link to an underlying microstructure. The data was obtained using single-edge-notch-bending specimens of cortical bone tested in a three-point bending setup; fracture surfaces of specimens were studied using scanning electron microscopy. Based on the results of those experiments, a number of finite-element models were developed in order to analyse its deformation and fracture using the extended finite-element method (X-FEM).Experimental results of this study demonstrate both variability and anisotropy of fracture toughness of the cortical bone tissue; the developed models adequately reflected the experimental data.

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Section: Numerical Models Of Three-point-bending Testmentioning

confidence: 99%

Analysis of fracture processes in cortical bone tissue

Abdel-Wahab

Silberschmidt

2013

Engineering Fracture Mechanics

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“…In these models, the onset of fracture is based on the critical maximum principal strain. A value of 0.4% was chosen to initiate the cracks in the homogenised material as well as all the microstructural constituents [28,29]. In a similar model, it was shown that cracks can be initiated perpendicular to maximum principal stress direction, mode I in tension [18], therefore, an initial crack of length 100 m has been placed at the middle upper and lower boundaries perpendicular to the loading tensile direction, see Fig.…”

Section: Xfem-based Cohesive Behaviour and Fracture Propertiesmentioning

confidence: 99%

Micro-scale modelling of bovine cortical bone fracture: Analysis of crack propagation and microstructure using X-FEM

Abdel-Wahab

Maligno

Silberschmidt

2012

Computational Materials Science

124

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• This is the author's version of a work that was accepted for publication in Computational Materials Science.Changes resulting from the publishing process, such as peer review, editing, corrections, structural for- Micro-scale modelling of bovine cortical bone fracture: Analysis of crack propagation and microstructure using X-FEM Adel A. Abdel-Wahab, Angelo R. Maligno, and Vadim V. SilberschmidtWolfson School of Mechanical and Manufacturing Engineering, Loughborough University, Loughborough, Leicestershire, LE11 3TU, UK Abstract Bone fracture susceptibility increased by factors such as bone loss, microstructure changes, and material properties variations. Therefore, investigation of the microstructure and material properties effect on the crack propagation and the global response at macro-scale level is of great importance. A non-uniform distribution of osteons in a cortical bone tissue results in a localization of deformation processes. Such localization can affect bone performance under external load and initiate fracture or assist its propagation. Once the fracture initiates, that distribution can play an important role on the crack propagation process at micro-scale level. Subsequently, the global response at macro-scale level could also be affected. In this study, a two-dimensional numerical (finite-element) fracture model for osteonal bovine cortical bone was developed with account for its microstructure using X-FEM. The topology of a transverse-radial cross section of a bovine cortical bone was captured with optical microscopy. The mechanical properties for the microstructural features of the cross-section were obtained with a use of the nanoindentation technique. Both the topology and nanoindentation data were used as input to the model formulated with the Abaqus 6.10 finite-element software. The area, directly reflecting micro-scale information, was embedded into the region with homogenised properties of the cortical bone. The simulations provide the macro-scale global response, crack propagation paths and the distribution of maximum principal stress fields at the micro-scale level for three different microscopic topologies; homogeneous, two phase composite model and threr phase composite model under tensile loading condition. The calculated stress fields for various cases of topologies demonstrate different patterns due to implementation of microstructural features in the finite-element model. There is an important role of the microstructure on the crack propagation trajectory. The suggested approach emphasizes the importance of microstructural features, especially cement lines, in development of bone failure.

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“…Several studies showed that bone exhibits a quasi-brittle material behavior [5,14,16,[32][33][34]62] or brittle behavior [31,43,68,88] depending mainly on the deformation rate applied and the bone properties. Therefore, more suitable physical models are still lacking to describe the brittle to quasi-brittle fracture behavior of human femur.…”

Section: Previous Fe Models Have Applied Different Uncoupled Fracturementioning

confidence: 99%

A quasi-brittle continuum damage finite element model of the human proximal femur based on element deletion

Hambli

2012

Med Biol Eng Comput

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Comparison of the elastic and yield properties of human femoral trabecular and cortical bone tissue

Cited by 938 publications

References 32 publications

Analysis of fracture processes in cortical bone tissue

Analysis of fracture processes in cortical bone tissue

Micro-scale modelling of bovine cortical bone fracture: Analysis of crack propagation and microstructure using X-FEM

A quasi-brittle continuum damage finite element model of the human proximal femur based on element deletion

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