Open AccessJournal Article
Numerical modelling of impact fracture of cortical bone tissue using X-FEM
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TLDR
In this paper, Extended Finite Element Method (X-FEM) implemented into the commercial finite element software Abaqus is used to simulate the actual crack initiation and growth in a cantilever beam of cortical bone exposed to quasi-static and impact loading using the Izod loading scheme.Abstract:
A cortical bone tissue is susceptible to fracture that can be caused by events, such as traumatic falls, sports injuries and traffic accidents. A proper treatment of bones and prevention of their fracture can be supported by in-depth understanding of deformation and fracture behaviour of this tissue in such dynamic events. Parameters such as damage initiation under impact, damage progression and impact strength can help to achieve this goal. In this paper, Extended Finite-Element Method (X-FEM) implemented into the commercial finite-element software Abaqus is used to simulate the actual crack initiation and growth in a cantilever beam of cortical bone exposed to quasi-static and impact loading using the Izod loading scheme. Izod tests were performed on notched bone specimens of bovine femur to measure its impact strength and to validate simulations. The simulation results show a good agreement with the experimental data.read more
Citations
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On the Mechanistic Origins of Toughness in Bone
TL;DR: In this article, the authors review the structure and properties of bone, focusing on mechanical deformation and fracture behavior from the perspective of the multidimensional hierarchical nature of its structure and derive its resistance to fracture with a multitude of deformation mechanisms at many size scales ranging from the nanoscale structure of protein molecules to the macroscopic physiological scale.
Journal ArticleDOI
Micro-CT finite element model and experimental validation of trabecular bone damage and fracture.
TL;DR: An isotropic micro-CT FE model at bone tissue level coupled to a damage law was developed in order to simulate the failure of human trabecular bone specimens under quasi-static compressive load and predict the apparent stress and strain.
Journal ArticleDOI
A quasi-brittle continuum damage finite element model of the human proximal femur based on element deletion.
TL;DR: A simple and practical finite element model coupled to a quasi-brittle damage law to describe the initiation and progressive propagation of multiple cracks based on element deletion is developed to predict the complete force–displacement curve and the fracture pattern of a human proximal femur under quasi-static load.
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A Robust 3D Finite Element Simulation of Human Proximal Femur Progressive Fracture Under Stance Load with Experimental Validation
Ridha Hambli,Samir Allaoui +1 more
TL;DR: The proposed FE model is based on continuum damage mechanics that can predict hip fracture in more adequate physical terms than criteria-based fracture models and leads to excellent agreement between predicted and measured results concerning the shape of the force–displacement curve and the profile of the fractured edge.
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Finite element prediction with experimental validation of damage distribution in single trabeculae during three-point bending tests.
Hambli Ridha,Philipp J. Thurner +1 more
TL;DR: A very good agreement was obtained between the FE and experimental results, indicating that the proposed damage investigation protocol based on FE analysis and testing is reliable to assess the damage behavior of bone tissue and that the current damage model is able to accurately simulate the damaging and fracturing process of single trabeculae under quasi static load.
References
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Journal ArticleDOI
Elastic crack growth in finite elements with minimal remeshing
Ted Belytschko,T. Black +1 more
TL;DR: In this article, a minimal remeshing finite element method for crack growth is presented, where Discontinuous enrichment functions are added to the finite element approximation to account for the presence of the crack.
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The partition of unity finite element method: Basic theory and applications
Jens Markus Melenk,Ivo Babuška +1 more
TL;DR: In this article, the basic ideas and the mathematical foundation of the partition of unity finite element method (PUFEM) are presented and a detailed and illustrative analysis is given for a one-dimensional model problem.
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Comparison of the elastic and yield properties of human femoral trabecular and cortical bone tissue.
Harun H. Bayraktar,Elise F. Morgan,Glen L. Niebur,Grayson Morris,Eric K. Wong,Tony M. Keaveny +5 more
TL;DR: While the elastic modulus and yield strains for trabecular tissue are just slightly lower than those of cortical tissue, because of the cumulative effect of these differences, tissue strength is about 25% greater for cortical bone.
Journal ArticleDOI
Changes in the stiffness, strength, and toughness of human cortical bone with age
Peter Zioupos,John D. Currey +1 more
TL;DR: Whether fracture of bone in three situations, allowing various amounts of damage prior to fracture, can provide a better insight into the fracture process and also the relative importance of these experimental methods for assessing the soundness of bone material is investigated.
Journal ArticleDOI
On the Mechanistic Origins of Toughness in Bone
TL;DR: In this article, the authors review the structure and properties of bone, focusing on mechanical deformation and fracture behavior from the perspective of the multidimensional hierarchical nature of its structure and derive its resistance to fracture with a multitude of deformation mechanisms at many size scales ranging from the nanoscale structure of protein molecules to the macroscopic physiological scale.