Strain redistribution and cracking behavior of human bone during bending

Ebacher, Vincent, Tang, Cecelia, McKay, Heather, Oxland, Thomas R., Guy, Pierre and Wang, Rizhi (2007) Strain redistribution and cracking behavior of human bone during bending. Bone, 40 5: 1265-1275. doi:10.1016/j.bone.2006.12.065


Author Ebacher, Vincent
Tang, Cecelia
McKay, Heather
Oxland, Thomas R.
Guy, Pierre
Wang, Rizhi
Title Strain redistribution and cracking behavior of human bone during bending
Journal name Bone   Check publisher's open access policy
ISSN 8756-3282
Publication date 2007-05
Sub-type Article (original research)
DOI 10.1016/j.bone.2006.12.065
Volume 40
Issue 5
Start page 1265
End page 1275
Total pages 11
Place of publication New York
Publisher Elsevier Science
Language eng
Subject 1103 Clinical Sciences
Abstract Long bones often fail due to bending loads. Understanding the fracture process during bending is of great importance to the prevention and treatment of bone fractures. In this study, we investigated the origin of long bone’s bending strength through the study of the dynamic previous termstrain redistributionnext term happening during the post-yield stage of deformation and its relation to microdamage at the microstructural level. This was accomplished by comparing the behaviors of human long bones with standard cortical bone specimens in terms of previous termstrain redistribution,next term Poisson’s ratios, microdamage morphologies, and macro-scale fracture patterns. It was found that human tibia failure in bending was very similar to that of standard beam cortical bone specimens with respect to the four previous aspects. Also, the examination of bone’s Poisson’s ratio indicated very different inelastic deformation mechanisms under tension and compression: bone volume expanded in tension but was nearly conserved in compression. Finally, as a result of previous termstrain redistribution,next term bone’s bending strength mainly depended on its compressive strength, which was significantly influenced by the osteonal “porous” microstructure of human bone as compared to its tensile behavior. Thus, we concluded that bone microstructure at the Haversian system level plays an important role in bone deformation and fracture.
Keyword Bones - Diseases
Calcium - Metabolism - Disorders
Bending fracture
Cortical bone
Inelastic deformation
Microdamage
Poisson’s ratio
previous termStrain redistribution
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Human Movement and Nutrition Sciences Publications
 
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Created: Tue, 10 Mar 2009, 15:51:06 EST by Ms Karen Naughton on behalf of School of Human Movement and Nutrition Sciences