Cezayirlioglu H, Bahniuk E, Davy D T, Heiple K G
J Biomech. 1985;18(1):61-9. doi: 10.1016/0021-9290(85)90045-4.
In this study the yield behavior of cortical bone was determined under combined loading conditions involving tension, compression and torsion. The axis of each test sample coincided with the long bone axis. To minimize viscoelastic behavior, tests were conducted using an effective strain rate in the range of 0.01-0.06 s-1. Experimental yield loci for bovine and human cortical bone were determined using a strain offset technique to determine the 'common yield point' for combined loading. Several failure criteria which have been used for composite materials were examined for applicability to the experimental results. Data were obtained for bovine and human tibial and femoral bone. The Tsai-Wu criterion was in best agreement to the test data, although Hill's criterion could describe the individual compression-torsion or tension-torsion regimes with good accuracy.
在本研究中，皮质骨的屈服行为是在涉及拉伸、压缩和扭转的联合加载条件下测定的。每个测试样本的轴与长骨轴重合。为了使粘弹性行为最小化，测试是在0.01 - 0.06 s-1范围内的有效应变率下进行的。使用应变偏移技术确定牛和人皮质骨的实验屈服轨迹，以确定联合加载的“共同屈服点”。研究了几种用于复合材料的失效准则对实验结果的适用性。获得了牛和人胫骨及股骨的数据。蔡 - 吴准则与测试数据的一致性最好，尽管希尔准则能够很好地描述单个压缩 - 扭转或拉伸 - 扭转状态。
