Orientation dependence of progressive post-yield behavior of human cortical bone in compression.
Orientation dependence of progressive post-yield behavior of human cortical bone in compression.
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DOI：
10.1016/j.jbiomech.2012.08.034
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发表时间：
2012-11-15
影响因子：
2.4
通讯作者：
Wang X
中科院分区：
文献类型：
--
作者：
Dong XN;Acuna RL;Luo Q;Wang X
确定骨屈服后变形过程中能量耗散的潜在机制对于理解骨脆性骨折至关重要。然而，骨的屈服后性质的取向依赖性仍然知之甚少。因此，本研究的目的是使用渐进加载方案确定加载方向对骨屈服后行为演变的影响。为此，从8名中年男性供体（51.5 ± 3.3岁）的尸体股骨中段，分别在纵向、周向和径向制备圆柱形压缩骨样本。这些样本在渐进加载方案中进行压缩测试。结果表明，弹性模量，屈服应力，和能量耗散在纵向方向上显着大于在横向（周向和径向）方向。然而，没有观察到显着差异，在屈服应变以及在连续的塑性应变相对于三个方向之间的施加应变的增加。这些结果表明，塑性应变的开始和发展是独立的加载方向，从而意味着在压缩骨的塑性行为的基本机制是相似的所有的方向。
Identifying the underlying mechanisms of energy dissipation during post-yield deformation of bone is critical in understanding bone fragility fractures. However, the orientation-dependence of post-yield properties of bone is still poorly understood. Thus, the objective of this study was to determine the effect of loading direction on the evolution of post-yield behavior of bone using a progressive loading protocol. To do so, cylindrical compressive bone samples were prepared each in the longitudinal, circumferential and radial directions, from the mid-shaft of cadaveric femurs procured from eight middle-aged male donors (51.5 ± 3.3 years old). These specimens were tested in compression in a progressive loading scheme. The results exhibited that the elastic modulus, yield stress, and energy dissipation were significantly greater in the longitudinal direction than in the transverse (circumferential and radial) directions. However, no significant differences were observed in the yield strain as well as in the successive plastic strain with respect to the increasing applied strain among the three orientations. These results suggest that the initiation and progression of plastic strain are independent of loading orientations, thus implying that the underlying mechanism of plastic behavior of bone in compression is similar in all the orientations.
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影响因子：
--
作者：
DEMPSTER, WT;LIDDICOAT, RT
通讯作者：
LIDDICOAT, RT
DOI：
10.2106/00004623-197658010-00015
发表时间：
1976-01-01
影响因子：
5.3
作者：
BURSTEIN, AH;REILLY, DT;MARTENS, M
通讯作者：
MARTENS, M
影响因子：
2.4
作者：
Bayraktar, HH;Keaveny, TM
通讯作者：
Keaveny, TM
影响因子：
64.8
作者：
KATZ, JL
通讯作者：
KATZ, JL
影响因子：
2.4
作者：
Kopperdahl, DL;Keaveny, TM
通讯作者：
Keaveny, TM