Interface mechanics in lower-limb external prosthetics: a review of finite element models.
Interface mechanics in lower-limb external prosthetics: a review of finite element models.
复制标题
下肢外部假肢的界面力学：有限元模型回顾。
DOI：
10.1109/86.547930
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Sanders,JE
中科院分区：
文献类型：
--
作者：
Zachariah,SG;Sanders,JE
残肢与接受腔界面处的机械应力分布是下肢假肢设计中一个重要的考虑因素。应力分布必须使截肢者稳定和舒适，同时避免对残肢组织造成创伤。通过有限元（FE）建模在接口处的应力的数值估计可以潜在地提供研究人员和假肢专家的工具，以帮助在假肢接受腔的设计。本文综述了下肢假肢界面应力的有限元建模方法。分析师所采用的建模方法进行了说明。不同的分析师对实验数据的界面应力的有限元估计的验证和可能的误差来源进行了讨论。虽然这些模式的表现令人鼓舞，但所有这些模式都有一定的局限性，需要进一步改进。界面应力对模型参数的敏感性的参数分析提供了一种工具，以确定模型的弱点，并提出可能的改进。不同的分析师的参数分析也提出了潜在的改进讨论。最后，假肢有限元建模的未来工作的方向提出了建议。
The distribution of mechanical stress at the interface between a residual limb and prosthetic socket is an important design consideration in lower-limb prosthetics. Stresses must be distributed so that the amputee is stable and comfortable, while avoiding trauma to the tissues of the residual limb. Numerical estimation of the stresses at the interface through finite element (FE) modeling can potentially provide researchers and prosthetists with a tool to aid in the design of the prosthetic socket. This review addresses FE modeling of interface stresses in lower-limb external prosthetics. The modeling methodologies adopted by analysts are described. Verification of FE estimates of interface stress against experimental data by different analysts is presented and the likely sources of error discussed. While the performance of the models is encouraging, there are definite limitations to all of them, necessitating further improvements. Parametric analysis of the sensitivity of interface stress to model parameters provides a tool to identify model weaknesses and to suggest possible refinements. Parametric analyses by different analysts are also presented and potential refinements discussed. Finally, directions for future work in prosthetic FE modeling are suggested.