Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 113-119 |
| Seitenumfang | 7 |
| Fachzeitschrift | Journal of the Mechanical Behavior of Biomedical Materials |
| Jahrgang | 2 |
| Ausgabenummer | 1 |
| Publikationsstatus | Veröffentlicht - Jan. 2009 |
| Extern publiziert | Ja |
Abstract
Repeated loadings may cause fatigue fractures in bony structures. Even if these failure types are known, data for trabecular bone exposed to cyclic loading are still insufficient as the majority of fatigue analyses on bone concentrate on cortical structures. Despite its highly anisotropic and inhomogeneous structure, trabecular bone is treated with continuum approaches in fatigue analyses. The underlying deformation and damage mechanism within trabecular specimens are not yet sufficiently investigated. In the present study different types of trabecular bone were loaded in monotonic and cyclic compression. In addition to the measurement of integral specimen deformations, optical deformation analysis was employed in order to obtain strain distributions at different scale levels, from the specimens' surface to the trabeculae level. These measurements allowed for the possibility of linking the macroscopic and microscopic mechanical behaviour of cancellous bone. Deformations were found to be highly inhomogeneous across the specimen. Furthermore strains were found to already localise at very low load levels and after few load cycles. Microcracks in individual trabeculae were induced in the very early stage of cyclic testing. The results provide evidence of the capability of the method to supply essential data on the failure behaviour of individual trabeculae in future studies. Crown
ASJC Scopus Sachgebiete
- Werkstoffwissenschaften (insg.)
- Biomaterialien
- Ingenieurwesen (insg.)
- Biomedizintechnik
- Ingenieurwesen (insg.)
- Werkstoffmechanik
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in: Journal of the Mechanical Behavior of Biomedical Materials, Jahrgang 2, Nr. 1, 01.2009, S. 113-119.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Fatigue damage in cancellous bone
T2 - An experimental approach from continuum to micro scale
AU - Dendorfer, S.
AU - Maier, H. J.
AU - Hammer, J.
PY - 2009/1
Y1 - 2009/1
N2 - Repeated loadings may cause fatigue fractures in bony structures. Even if these failure types are known, data for trabecular bone exposed to cyclic loading are still insufficient as the majority of fatigue analyses on bone concentrate on cortical structures. Despite its highly anisotropic and inhomogeneous structure, trabecular bone is treated with continuum approaches in fatigue analyses. The underlying deformation and damage mechanism within trabecular specimens are not yet sufficiently investigated. In the present study different types of trabecular bone were loaded in monotonic and cyclic compression. In addition to the measurement of integral specimen deformations, optical deformation analysis was employed in order to obtain strain distributions at different scale levels, from the specimens' surface to the trabeculae level. These measurements allowed for the possibility of linking the macroscopic and microscopic mechanical behaviour of cancellous bone. Deformations were found to be highly inhomogeneous across the specimen. Furthermore strains were found to already localise at very low load levels and after few load cycles. Microcracks in individual trabeculae were induced in the very early stage of cyclic testing. The results provide evidence of the capability of the method to supply essential data on the failure behaviour of individual trabeculae in future studies. Crown
AB - Repeated loadings may cause fatigue fractures in bony structures. Even if these failure types are known, data for trabecular bone exposed to cyclic loading are still insufficient as the majority of fatigue analyses on bone concentrate on cortical structures. Despite its highly anisotropic and inhomogeneous structure, trabecular bone is treated with continuum approaches in fatigue analyses. The underlying deformation and damage mechanism within trabecular specimens are not yet sufficiently investigated. In the present study different types of trabecular bone were loaded in monotonic and cyclic compression. In addition to the measurement of integral specimen deformations, optical deformation analysis was employed in order to obtain strain distributions at different scale levels, from the specimens' surface to the trabeculae level. These measurements allowed for the possibility of linking the macroscopic and microscopic mechanical behaviour of cancellous bone. Deformations were found to be highly inhomogeneous across the specimen. Furthermore strains were found to already localise at very low load levels and after few load cycles. Microcracks in individual trabeculae were induced in the very early stage of cyclic testing. The results provide evidence of the capability of the method to supply essential data on the failure behaviour of individual trabeculae in future studies. Crown
KW - Cancellous bone
KW - Damage
KW - Deformation behaviour
KW - Fatigue
KW - Measurement and testing
KW - Mechanical behaviour
UR - http://www.scopus.com/inward/record.url?scp=55249109212&partnerID=8YFLogxK
U2 - 10.1016/j.jmbbm.2008.03.003
DO - 10.1016/j.jmbbm.2008.03.003
M3 - Article
C2 - 19627813
AN - SCOPUS:55249109212
VL - 2
SP - 113
EP - 119
JO - Journal of the Mechanical Behavior of Biomedical Materials
JF - Journal of the Mechanical Behavior of Biomedical Materials
SN - 1751-6161
IS - 1
ER -