Anisotropic Poisson's ratio and compression modulus of cortical bone determined by speckle interferometry
Anisotropic Poisson's ratio and compression modulus of cortical bone determined by speckle interferometry
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DOI：
10.1016/j.jbiomech.2006.01.021
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发表时间：
2007-01-01
影响因子：
2.4
通讯作者：
Weiner, S.
中科院分区：
文献类型：
--
作者：
Shahar, R.;Zaslansky, P.;Weiner, S.
使用微机械加载装置在压缩状态下测量 6 毫米大小的马皮质骨立方体的杨氏模量和泊松比。表面位移通过电子散斑图案相关干涉测量法测定。该方法允许对水中非常小的样品进行无损检测。标准材料的分析表明，该方法对于杨氏模量和泊松比的测定准确且精确。在三个正交解剖方向（轴向、径向和横向）上同时确定材料特性。杨氏模量值被发现是各向异性的并且与文献报道的马皮质骨的值一致。泊松比也被发现是各向异性的，但低于之前报道的。径向-横向和横向径向方向的泊松比为0.15+/-0.02，轴向-横向和轴向-径向方向的泊松比为0.19+/-0.04，并且横向-轴向和径向-轴向方向的泊松比为0.09+/-0.02(平均值+/-SD)。相距仅毫米的立方体具有显着不同的弹性特性，表明马皮质骨中存在显着的空间变化。 (c) 2006 Elsevier Ltd. 保留所有权利。
Young's modulus and Poisson's ratios of 6 mm-sized cubes of equine cortical bone were measured in compression using a micromechanical loading device. Surface displacements were determined by electronic speckle pattern-correlation interferometry. This method allows for non-destructive testing of very small samples in water. Analyses of standard materials showed that the method is accurate and precise for determining both Young's modulus and Poisson's ratio. Material properties were determined concurrently in three orthogonal anatomic directions (axial, radial and transverse). Young's modulus values were found to be anisotropic and consistent with values of equine cortical bone reported in the literature. Poisson's ratios were also found to be anisotropic, but lower than those previously reported. Poisson's ratios for the radial-transverse and transverse radial directions were 0.15 +/- 0.02, for the axial-transverse and axial-radial directions 0.19 +/- 0.04, and for the transverse-axial and radial-axial direction 0.09 +/- 0.02 (mean +/- SD). Cubes located only millimetres apart had significantly different elastic properties, showing that significant spatial variation occurs in equine cortical bone. (c) 2006 Elsevier Ltd. All rights reserved.