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本文对人体股骨头提出了由不同弹性常数组合的平面模型。作者仅考虑骨髋关节在额状面内作用着主要肌力情况下,应用有限元素法计算了人体股骨头的应力场。计算结果表明:(1)股骨头主要受弯曲应力,内侧处受压应力而且中性层处于股骨头中心线的外上方;(2)最大拉应力产生在股骨头基部,而最大压应力和最大剪应力产生在股骨项下方;(3)载荷大部分由密质骨承担,越往下承担比例也越大;(4)主应力迹线与骨小梁方向基本重合。
In this paper, a planar model composed of different elastic constants is proposed for the human femoral head. The author only considers the major muscle forces acting on the frontal plane of bone and hip joints. The finite element method is used to calculate the stress field of the femoral head. The results show that: (1) the femoral head is mainly subject to bending stress, the medial compressive stress and the neutral layer are located at the outer top of the femoral head centerline; (2) the maximum tensile stress is generated at the base of the femoral head, and the maximum compressive stress and maximum Shear stress occurs below the femoral component; (3) Most of the load is borne by the dense bone, and the greater the proportion of the load, the greater the downward load. (4) The main stress trace and the trabecular bone direction basically coincide.