University of Technology and Life Sciences, Faculty of Mechanical Engineering, ul. Kaliskiego 7, 85-796 Bydgoszcz, Poland.
J Mech Behav Biomed Mater. 2011 Nov;4(8):1755-63. doi: 10.1016/j.jmbbm.2011.05.032. Epub 2011 Jun 13.
This paper presents the results of a study of 61 trabecular bone samples exposed to a cyclic (1 Hz) compression load. The load was increased stepwise. Characteristic patterns of the hysteresis loop for the middle cycles of successive steps of load and for respective steps of load are presented. Characteristic patterns of secant modulus were also determined. The fatigue life results recorded were compared with the indices of bone architecture determined using micro-CT. Using Pearson's correlation, the best relationship between fatigue life and bone volume ratio (BV/TV) and the maximum load for which there was also reported a maximal value secant stiffness were identified. Based on these findings, it was determined that it is possible to use stepwise increasing load for analysis of the fatigue behavior of trabecular bone.
本文介绍了对 61 个小梁骨样本在循环（1 Hz）压缩载荷下进行的研究结果。载荷逐步增加。给出了连续加载步骤的中间循环和各自加载步骤的滞后环的特征模式。还确定了割线模量的特征模式。记录的疲劳寿命结果与使用微 CT 确定的骨结构指数进行了比较。使用 Pearson 相关，确定了疲劳寿命与骨体积比（BV/TV）之间的最佳关系，以及报告最大割线刚度的最大载荷。基于这些发现，确定可以使用逐步增加的载荷来分析小梁骨的疲劳行为。
