Vahey J W, Lewis J L, Vanderby R
J Biomech. 1987;20(1):29-33. doi: 10.1016/0021-9290(87)90264-8.
Elastic moduli, yield stress and ultimate compressive stress were determined for cancellous bone from the femoral head and neck regions of the canine femur. Unconfined compression tests were performed on 5 mm cubic samples which were cut from two femurs. Elastic moduli were measured in three orthogonal directions, and the yield stress and ultimate stress were measured along the proximal-distal axis. The results from this investigation support previous assumptions that the mechanical behavior of canine cancellous bone is qualitatively similar to human cancellous bone. The canine cancellous bone was observed to be anisotropic in elastic modulus. For two thirds of the cubic specimens tested, the elastic modulus was largest in the load-bearing, proximal-distal direction. A linear relationship between yield stress and elastic modulus was observed for canine bone, as is typical of human bone. A similar linear relationship between ultimate stress and elastic modulus was observed. Thus, for canine bone as well as for human bone, failure appears to be governed by a strain level which is position independent. The yield strain of 0.0259 and ultimate strain of 0.0288 for canine bone were both less than the yield strain of 0.0395 reported for human bone.
测定了犬股骨股骨头和颈部松质骨的弹性模量、屈服应力和极限抗压应力。对从两根股骨上切下的5毫米立方体样本进行了无侧限压缩试验。在三个正交方向上测量弹性模量，沿着近端-远端轴测量屈服应力和极限应力。本研究结果支持了先前的假设，即犬松质骨的力学行为在质量上与人类松质骨相似。观察到犬松质骨的弹性模量具有各向异性。在测试的三分之二的立方体标本中，弹性模量在承重的近端-远端方向上最大。犬骨的屈服应力和弹性模量之间存在线性关系，这是人类骨骼的典型特征。极限应力和弹性模量之间也观察到类似的线性关系。因此，对于犬骨和人类骨骼，失效似乎受与位置无关的应变水平控制。犬骨的屈服应变0.0259和极限应变0.0288均小于报道的人类骨骼屈服应变0.0395。
