Spilker R L, Daugirda D M, Schultz A B
J Biomech. 1984;17(2):103-12. doi: 10.1016/0021-9290(84)90128-3.
A simple axisymmetric finite element model of a human spine segment containing two adjacent vertebrae and the intervening intervertebral disc was constructed. The bodies and disc were modeled by three substructures; one to represent each of the vertebral bodies, the annulus fibrosus, and the nucleus pulposus. A semi-analytic technique was used to maintain the computational economies of a two-dimensional analysis when non- axisymmetric loads were imposed on the model. The response of the model to compression, shear, torsion and bending loads applied to the superior vertebral body was examined to determine the effects of disc geometry and material properties on response. Comparisons of model responses with experimentally measured responses were made to estimate material property values for which model behaviors are in agreement with measured behaviors.
构建了一个简单的轴对称有限元模型，该模型包含两个相邻的椎骨以及其间的椎间盘。椎体和椎间盘由三个子结构建模；一个代表每个椎体，一个代表纤维环，另一个代表髓核。当对模型施加非轴对称载荷时，使用半解析技术以保持二维分析的计算经济性。研究了模型对上椎体施加的压缩、剪切、扭转和弯曲载荷的响应，以确定椎间盘几何形状和材料特性对响应的影响。将模型响应与实验测量响应进行比较，以估计模型行为与测量行为一致时的材料特性值。
