Abstract
Our hypothesis was that post-yield mechanical behavior of compact bone material in compression, defined as the stress, strain, or energy absorbed between 0.2% strain-offset and the point of maximum stress, is correlated with material density, modulus, strength, histomorphometric evidence of remodeling, and post-failure gross specimen morphology. Post-yield behavior of compact bone material from the third metacarpal bone of 10 horses, ages 5 months to 20 years, was investigated using single-load compression-to-failure. The post-yield stress, strain, and absorbed energy were compared with the compressive elastic modulus, yield stress, ash density, post-failure macroscopic appearance of the specimen, and histologic evidence of remodeling. High values of elastic modulus, yield stress, and ash density were associated with low values of post-yield mechanical properties (stress, strain, and absorbed energy). Macroscopic post-failure morphology was associated with post-yield mechanical behavior, in that specimens displaying fractures were associated with lower post-yield mechanical properties, and that those without evidence of frank fracture were associated with higher post-yield mechanical properties. Microscopic evidence of remodeling activity was associated with high post-yield mechanical properties, but not with gross post-failure morphology. There was an abrupt change from relatively high values to extremely low values of post-yield mechanical properties at intermediate levels of ash density. This feature may serve as a functional upper limit to the maximization of bone material stiffness and strength.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 607-614 |
| Number of pages | 8 |
| Journal | Journal of Orthopaedic Research |
| Volume | 20 |
| Issue number | 3 |
| DOIs | |
| State | Published - 2002 |
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Keywords
- Bone
- Equine
- Mechanical testing
- Metacarpus
- Post-yield behavior
ASJC Scopus subject areas
- Orthopedics and Sports Medicine
Cite this
Stiff and strong compressive properties are associated with brittle post-yield behavior in equine compact bone material. / Les, C. M.; Stover, Susan M; Keyak, J. H.; Taylor, K. T.; Kaneps, A. J.
In: Journal of Orthopaedic Research, Vol. 20, No. 3, 2002, p. 607-614.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Stiff and strong compressive properties are associated with brittle post-yield behavior in equine compact bone material
AU - Les, C. M.
AU - Stover, Susan M
AU - Keyak, J. H.
AU - Taylor, K. T.
AU - Kaneps, A. J.
PY - 2002
Y1 - 2002
N2 - Our hypothesis was that post-yield mechanical behavior of compact bone material in compression, defined as the stress, strain, or energy absorbed between 0.2% strain-offset and the point of maximum stress, is correlated with material density, modulus, strength, histomorphometric evidence of remodeling, and post-failure gross specimen morphology. Post-yield behavior of compact bone material from the third metacarpal bone of 10 horses, ages 5 months to 20 years, was investigated using single-load compression-to-failure. The post-yield stress, strain, and absorbed energy were compared with the compressive elastic modulus, yield stress, ash density, post-failure macroscopic appearance of the specimen, and histologic evidence of remodeling. High values of elastic modulus, yield stress, and ash density were associated with low values of post-yield mechanical properties (stress, strain, and absorbed energy). Macroscopic post-failure morphology was associated with post-yield mechanical behavior, in that specimens displaying fractures were associated with lower post-yield mechanical properties, and that those without evidence of frank fracture were associated with higher post-yield mechanical properties. Microscopic evidence of remodeling activity was associated with high post-yield mechanical properties, but not with gross post-failure morphology. There was an abrupt change from relatively high values to extremely low values of post-yield mechanical properties at intermediate levels of ash density. This feature may serve as a functional upper limit to the maximization of bone material stiffness and strength.
AB - Our hypothesis was that post-yield mechanical behavior of compact bone material in compression, defined as the stress, strain, or energy absorbed between 0.2% strain-offset and the point of maximum stress, is correlated with material density, modulus, strength, histomorphometric evidence of remodeling, and post-failure gross specimen morphology. Post-yield behavior of compact bone material from the third metacarpal bone of 10 horses, ages 5 months to 20 years, was investigated using single-load compression-to-failure. The post-yield stress, strain, and absorbed energy were compared with the compressive elastic modulus, yield stress, ash density, post-failure macroscopic appearance of the specimen, and histologic evidence of remodeling. High values of elastic modulus, yield stress, and ash density were associated with low values of post-yield mechanical properties (stress, strain, and absorbed energy). Macroscopic post-failure morphology was associated with post-yield mechanical behavior, in that specimens displaying fractures were associated with lower post-yield mechanical properties, and that those without evidence of frank fracture were associated with higher post-yield mechanical properties. Microscopic evidence of remodeling activity was associated with high post-yield mechanical properties, but not with gross post-failure morphology. There was an abrupt change from relatively high values to extremely low values of post-yield mechanical properties at intermediate levels of ash density. This feature may serve as a functional upper limit to the maximization of bone material stiffness and strength.
KW - Bone
KW - Equine
KW - Mechanical testing
KW - Metacarpus
KW - Post-yield behavior
UR - http://www.scopus.com/inward/record.url?scp=0036239159&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036239159&partnerID=8YFLogxK
U2 - 10.1016/S0736-0266(01)00138-3
DO - 10.1016/S0736-0266(01)00138-3
M3 - Article
C2 - 12038638
AN - SCOPUS:0036239159
VL - 20
SP - 607
EP - 614
JO - Journal of Orthopaedic Research
JF - Journal of Orthopaedic Research
SN - 0736-0266
IS - 3
ER -