Mechanisms governing the inelastic deformation of cortical bone and application to trabecular bone

To understand the inelastic response of bone, a three-part investigation has been conducted. In the first, unload/reload tests have been used to characterize the hysteresis and provide insight into the mechanisms causing the strain. The second part devises a model for the stress/strain response, bas...

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Bibliographic Details
Published in:Acta biomaterialia 2006, Vol.2 (1), p.59-68
Main Authors: Mercer, C., He, M.Y., Wang, R., Evans, A.G.
Format: Article
Language:English
Subjects:
Animals
Biomechanical Phenomena
Bone
Bone and Bones - physiology
Bone and Bones - ultrastructure
Cattle
Compressive Strength
Cortical
Elasticity
Hysteresis
In Vitro Techniques
Inelastic deformation
Materials Testing
Microscopy, Electron, Scanning
Models, Biological
Trabecular
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Summary:To understand the inelastic response of bone, a three-part investigation has been conducted. In the first, unload/reload tests have been used to characterize the hysteresis and provide insight into the mechanisms causing the strain. The second part devises a model for the stress/strain response, based on understanding developed from the measurements. The model rationalizes the inelastic deformation in tension, as well as the permanent strain and hysteresis. In the third part, a constitutive law representative of the deformation is selected and used to illustrate the coupled buckling and bending of ligaments that arise when trabecular bone is loaded in compression.
ISSN:1742-7061
1878-7568
DOI:10.1016/j.actbio.2005.08.004