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Anisotropy of the fatigue behaviour of cancellous bone.

Authors
Type
Published Article
Journal
Journal of Biomechanics
0021-9290
Publisher
Elsevier
Publication Date
Volume
41
Issue
3
Pages
636–641
Identifiers
PMID: 18005974
Source
Medline

Abstract

The fatigue behaviour of materials is of particular interest for the failure prediction of materials and structures exposed to cyclic loading. For trabecular bone structures only a few sets of lifetime data have been reported in the literature and structural measures are commonly not considered. The influence of load contributions which are not aligned with the main physiological axis remains unclear. Furthermore site and species dependent relationships are not well described. In this study five different groups of trabecular bone, defined in terms of orientation, species and site were exposed to cyclic compression. In total, 108 fatigue tests were analysed. The lifetimes were found to decrease drastically when off-axis loads were applied. Additionally, species and site strongly affect fatigue lifetimes. Strains at failure were also found to be a function of orientation.

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