Behiri J C, Bonfield W
J Biomech. 1984;17(1):25-34. doi: 10.1016/0021-9290(84)90076-9.
The fracture mechanics parameters of critical stress intensity factor (Kc) and critical strain energy release rate (Gc) for longitudinal fracture of bovine tibia cortical bone were determined by the compact tension method. It was demonstrated that, for a given bone density, Kc and Gc depended on the loading rate, and resultant crack velocity, with a maximum in fracture toughness (Kc approximately 6.3 MNm-3/2, Gc approximately 2900 Jm-2) at a crack velocity approximately 10(-3) ms-1. For a given loading rate, or crack velocity, an increase in bone density, in the range from 1.92 to 2.02 Mgm-3, produced increases in Kc and Gc, but a variation in specimen thickness (from 0.5 to 2 mm) had no effect on the measured fracture mechanics parameters.
采用紧凑拉伸法测定了牛胫骨皮质骨纵向断裂的临界应力强度因子（Kc）和临界应变能释放率（Gc）等断裂力学参数。结果表明，对于给定的骨密度，Kc和Gc取决于加载速率和裂纹扩展速度，在裂纹速度约为10^(-3) m/s时，断裂韧性达到最大值（Kc约为6.3 MNm^(-3/2)，Gc约为2900 Jm^(-2)）。对于给定的加载速率或裂纹速度，在骨密度从1.92增加到2.02 Mgm^(-3)的范围内，Kc和Gc会增加，但试样厚度（从0.5到2 mm）的变化对所测断裂力学参数没有影响。
