Reduction of plantar heel pressures: Insole design using finite element analysis
Reduction of plantar heel pressures: Insole design using finite element analysis
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DOI：
10.1016/j.jbiomech.2005.08.006
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发表时间：
2006-01-01
影响因子：
2.4
通讯作者：
Cavanagh, Peter R.
中科院分区：
文献类型：
--
作者：
Goske, Steven;Erdemir, Ahmet;Cavanagh, Peter R.
足跟痛是一种常见病症，经常因行走的重复压力而加剧。治疗通常包括鞋内干预，旨在通过使用鞋垫和各种现成产品来降低脚跟下方的足底压力。这些产品的设计过程本质上通常是直观的，并不总是依赖于科学得出的指导方针。有限元分析提供了一个有效的计算框架来研究大量设计的性能，以实现最佳的足底减压。在本研究中，我们使用二维平面应变有限元建模来研究 27 种鞋垫设计。在步态的早期支撑阶段模拟了三种鞋垫适形级别（平坦、半适形、完全适形）、三种鞋垫厚度值（6.3、9.5 和 12.7 毫米）和三种鞋垫材料（Poron Cushioning、Microcel Puff Lite 和 Microcel Puff）的组合。该模型预测的足底压力通过在同一受试者中进行的实验得到验证，该受试者的脚跟是通过在刚性表面和泡沫垫上加载赤脚来建模的。鞋垫的一致性是最重要的设计变量，而峰值压力对鞋垫材料的选择相对不敏感。该模型预测，使用平底鞋垫时，与赤足条件相比，压力可减轻 24%；对于完全符合要求的鞋垫，减少量最多可增加 44%。 (c) 2005 Elsevier Ltd. 保留所有权利。
Plantar heel pain is a common condition that is often exacerbated by the repetitive stresses of walking. Treatment usually includes an in-shoe intervention designed to reduce plantar pressure under the heel by using insoles and a variety of off-the-shelf products. The design process for these products is often intuitive in nature and does not always rely on scientifically derived guidelines. Finite element analysis provides an efficient computational framework to investigate the performance of a large number of designs for optimal plantar pressure reduction. In this study, we used two-dimensional plane strain finite element modeling to investigate 27 insole designs. Combinations of three insole conformity levels (flat, half conforming, full conforming), three insole thickness values (6.3, 9.5 and 12.7 mm) and three insole materials (Poron Cushioning, Microcel Puff Lite and Microcel Puff) were simulated during the early support phase of gait. Plantar pressures predicted by the model were validated by experimental trials conducted in the same subject whose heel was modeled by loading the bare foot on a rigid surface and on foam mats. Conformity of the insole was the most important design variable, whereas peak pressures were relatively insensitive to insole material selection. The model predicted a 24% relief in pressure compared to barefoot conditions when using flat insoles; the reduction increased up to 44% for full conforming insoles. (c) 2005 Elsevier Ltd. All rights reserved.