Image-based midsole insert design and the material effects on heel plantar pressure distribution during simulated walking loads
Image-based midsole insert design and the material effects on heel plantar pressure distribution during simulated walking loads
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DOI：
10.1080/10255842.2010.493886
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发表时间：
2011-01-01
影响因子：
1.6
通讯作者：
Li, Z. Y.
中科院分区：
文献类型：
--
作者：
Gu, Y. D.;Li, J. S.;Li, Z. Y.
本文的主要目的是研究基于医学图像的有限元（FE）建模在特定对象的中底设计中的使用，以及使用跟骨区域（UCA）下的中底塞来优化足跟压力降低。具有与受试者的跟骨的尺寸不同的相对尺寸的塞已经被结合在鞋底夹层的鞋跟区域中。通过将数值预测的足底压力与对同一受试者进行的生物力学测试进行比较，验证了FE足部模型。对于每一种UCA中底塞设计，系统地研究了材料特性和塞厚度对正常行走的脚跟着地阶段期间足底压力分布和峰值压力水平的影响。结果表明，UCA中底插入物可以有效地改变压力分布，其效果与塞子尺寸与受试者跟骨尺寸的比例直接相关。与不带塞子的实心中底的压力水平相比，尺寸为跟骨的95%的中等硬度塞子在缓解峰值压力方面实现了最佳性能，而尺寸为跟骨插入件的65%的较小塞子（具有非常软的材料）显示出最小的压力缓解有益效果。
The primary objective of this paper is to study the use of medical image-based finite element (FE) modelling in subject-specific midsole design and optimisation for heel pressure reduction using a midsole plug under the calcaneus area (UCA). Plugs with different relative dimensions to the size of the calcaneus of the subject have been incorporated in the heel region of the midsole. The FE foot model was validated by comparing the numerically predicted plantar pressure with biomechanical tests conducted on the same subject. For each UCA midsole plug design, the effect of material properties and plug thicknesses on the plantar pressure distribution and peak pressure level during the heel strike phase of normal walking was systematically studied. The results showed that the UCA midsole insert could effectively modify the pressure distribution, and its effect is directly associated with the ratio of the plug dimension to the size of the calcaneus bone of the subject. A medium hardness plug with a size of 95% of the calcaneus has achieved the best performance for relieving the peak pressure in comparison with the pressure level for a solid midsole without a plug, whereas a smaller plug with a size of 65% of the calcaneus insert with a very soft material showed minimum beneficial effect for the pressure relief.