Hübsch P F, Middleton J, Meroi E A, Natali A N
University College of Swansea, Department of Civil Engineering, Wales, UK.
Med Biol Eng Comput. 1995 Jan;33(1):33-7. doi: 10.1007/BF02522942.
The study uses the finite-element method to analyse the stress field in a perfectly bonded hip prosthesis arising from loading through body weight. Special attention is paid to the accuracy of the numerical analysis, and adaptive mesh refinement is introduced to reduce the discretisation error. The finite-element procedure developed is especially well suited to analyse the behaviour of a bonded interface as it is capable of calculating accurately the stress at the nodal positions while satisfying the natural discontinuity in the stress field at this location. An orthotropic material model is used for the representation of the behaviour of the bone, and an axisymmetric geometry with non-symmetrical loading is adopted for the analysis. The results demonstrate the usefulness of adaptive mesh refinement and the significance of adopting anisotropic material modelling in the context of tissue/prosthesis interaction.
该研究采用有限元方法分析了因体重加载而产生的完美结合髋关节假体中的应力场。特别关注数值分析的准确性，并引入自适应网格细化以减少离散误差。所开发的有限元程序特别适合分析结合界面的行为，因为它能够在满足该位置应力场自然不连续性的同时，精确计算节点位置的应力。采用正交各向异性材料模型来表示骨骼的行为，并采用具有非对称载荷的轴对称几何形状进行分析。结果证明了自适应网格细化的实用性以及在组织/假体相互作用背景下采用各向异性材料建模的重要性。
