Bini Fabiano, Marinozzi Andrea, Marinozzi Franco, Patanè Federico
Faculty of Engineering, Department of Mechanics and Aeronautics, Mechanical and Thermal Measurements Laboratory, University of Rome La Sapienza, Via Eudossiana 18, 00184 Rome, Italy.
J Biomech. 2002 Nov;35(11):1515-9. doi: 10.1016/s0021-9290(02)00182-3.
In this paper, the authors perform microtensile tests of single trabeculae excised from a human femur head. One of the main issues of this work is to establish some experimental procedures for preparing and testing the specimens. The use of a well-characterized microtensile apparatus allows for a low intraspecimen dispersion of the measured stiffness. Tensile/compressive tests were chosen because they appear less sensitive to errors in the cross-sectional area measurements with respect to bending tests. By these considerations, some tensile/compressive tests of plate-like trabecular specimens have been carried out. Typical stiffness values are 74.2+/-0.7Nmm(-1) for tensile tests, and 58.9+/-0.6Nmm(-1) for compressive test. Another compressive test performed on a shorter specimen yielded a stiffness value of 148.3+/-5.3Nmm(-1). The maximum applied load was about 0.5N. Rough measurements of specimens sizes yielded a Young's modulus value ranging from 1.41 to 1.89GPa.
在本文中，作者对从人股骨头切除的单个小梁进行了微拉伸试验。这项工作的主要问题之一是建立一些制备和测试标本的实验程序。使用经过充分表征的微拉伸装置可使测量刚度在标本内的分散性较低。选择拉伸/压缩试验是因为相对于弯曲试验，它们似乎对横截面积测量中的误差不太敏感。基于这些考虑，已经对板状小梁标本进行了一些拉伸/压缩试验。拉伸试验的典型刚度值为74.2±0.7Nmm(-1)，压缩试验的典型刚度值为58.9±0.6Nmm(-1)。对一个较短标本进行的另一次压缩试验得到的刚度值为148.3±5.3Nmm(-1)。最大施加载荷约为0.5N。对标本尺寸的粗略测量得出杨氏模量值在1.41至1.89GPa之间。
