Effect of orientation and age on the crack propagation in cortical bone

2018 ◽  
Vol 29 (5) ◽  
pp. 601-610
Author(s):  
Noor Rahman ◽  
Waseem Ur Rahman ◽  
Rafiullah Khan
Keyword(s):  
Crack Propagation ◽  
Cortical Bone

Finite Element Modeling for Energy Release Rate in Human Cortical Bone

Volume 2 ◽  
2004 ◽  
Author(s):  
Saiphon Charoenphan ◽  
Apiwon Polchai
Keyword(s):  
Finite Element ◽  
Crack Propagation ◽  
Finite Element Modeling ◽  
Energy Release Rate ◽  
Cortical Bone ◽  
Energy Release ◽  
Crack Growth ◽  
Release Rate ◽  
Slow Crack Growth ◽  
Finite Element Models

The energy release rates in human cortical bone are investigated using a hybrid method of experimental and finite element modeling techniques. An explicit finite element analysis was implemented with an energy release rate calculation for evaluating this important fracture property of bones. Comparison of the critical value of the energy release rate, Gc, shows good agreement between the finite element models and analytical solutions. The Gc was found to be approximately 820–1150 J/m2 depending upon the samples. Specimen thickness appears to have little effect on the plane strain condition and pure mode I assumption. Therefore the energy release rate can be regarded as a material constant and geometry independent and can be determined with thinner specimens. In addition, the R curve resulting from the finite element models during slow crack growth shows slight ductility of the bone specimen that indicates an ability to resist crack propagation. Oscillations were found at the onset of the crack growth due to the nodal releasing application in the models. In this study light mass-proportional damping was used to suppress the noises. Although this techniques was found to be efficient for this slow crack growth simulation, other methods to continuously release nodes during the crack growth would be recommended for rapid crack propagation.

Evaluation of mode I fracture toughness of cortical bone tissue in the RL crack propagation system

2014 ◽  
Vol 26 (2) ◽  
pp. 96-101
Author(s):  
F.A.M. Pereira ◽  
M.F.S.F. de Moura ◽  
N. Dourado ◽  
J.J.L. Morais ◽  
M.I.R. Dias
Keyword(s):  
Fracture Toughness ◽  
Crack Propagation ◽  
Cortical Bone ◽  
Bone Tissue ◽  
Mode I ◽  
Mode I Fracture ◽  
Mode I Fracture Toughness

scholarly journals Effect of micro-morphology of cortical bone tissue on fracture toughness and crack propagation

2017 ◽  
Vol 6 ◽  
pp. 64-68 ◽  
Author(s):  
Mayao Wang ◽  
Elizabeth A. Zimmermann ◽  
Christoph Riedel ◽  
Björn Busse ◽  
Simin Li ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Crack Propagation ◽  
Cortical Bone ◽  
Bone Tissue ◽  
Micro Morphology

scholarly journals Nonlinear ultrasound monitoring of single crack propagation in cortical bone

2012 ◽  
Author(s):  
Sylvain Haupert ◽  
Sandra Guerard ◽  
David Mitton ◽  
Françoise Peyrin ◽  
Pascal Laugier
Keyword(s):  
Crack Propagation ◽  
Cortical Bone ◽  
Single Crack ◽  
Nonlinear Ultrasound ◽  
Ultrasound Monitoring

scholarly journals The influence of microstructure on crack propagation in cortical bone at the mesoscale

2020 ◽  
Vol 112 ◽  
pp. 110020
Author(s):  
Anna Gustafsson ◽  
Mathias Wallin ◽  
Hanna Isaksson
Keyword(s):  
Crack Propagation ◽  
Cortical Bone

scholarly journals What is the influence of two strain rates on the relationship between human cortical bone toughness and micro-structure?

2019 ◽  
Vol 234 (3) ◽  
pp. 247-254 ◽  
Author(s):  
Rémy Gauthier ◽  
Hélène Follet ◽  
Max Langer ◽  
Françoise Peyrin ◽  
David Mitton
Keyword(s):  
Crack Propagation ◽  
Strain Rate ◽  
Cortical Bone ◽  
Static Loading ◽  
Fracture Mechanisms ◽  
Strain Rates ◽  
Micro Structure ◽  
Human Cortical Bone ◽  
Cross Links ◽  
Haversian System

Cortical bone fracture mechanisms are well studied under quasi-static loading. The influence of strain rate on crack propagation mechanisms needs to be better understood, however. We have previously shown that several aspects of the bone micro-structure are involved in crack propagation, such as the complete porosity network, including the Haversian system and the lacunar network, as well as biochemical aspects, such as the maturity of collagen cross-links. The aim of this study is to investigate the influence of strain rate on the toughness of human cortical bone with respect to its microstructure and organic non-collagenous composition. Two strain rates will be considered: quasi-static loading (10−4 s−1), a standard condition, and a higher loading rate (10−1 s−1), representative of a fall. Cortical bone samples were extracted from eight female donors (age 50–91 years). Three-point bending tests were performed until failure. Synchrotron radiation micro-computed tomography imaging was performed to assess bone microstructure including the Haversian system and the lacunar system. Collagen enzymatic cross-link maturation was measured using a high performance liquid chromatography column. Results showed that that under quasi-static loading, the elastic contribution of the fracture process is correlated to both the collagen cross-links maturation and the microstructure, while the plastic contribution is correlated only to the porosity network. Under fall-like loading, bone organization appears to be less linked to crack propagation.

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