A 3-dimensional finite element model of the human foot and ankle for insole design
A 3-dimensional finite element model of the human foot and ankle for insole design
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DOI：
10.1016/j.apmr.2004.03.031
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发表时间：
2005-02-01
影响因子：
4.3
通讯作者：
Zhang, M
中科院分区：
文献类型：
--
作者：
Cheung, JTM;Zhang, M
目的：为了研究材料刚度的平面和定制成型鞋垫足底压力和应力分布的骨骼和韧带结构在平衡standing.Design：一个三维（3-D）的有限元模型的人的踝足复合体和定制成型鞋垫开发从3-D重建的磁共振图像和表面数字化。将胫骨远端和腓骨连同26个足骨、72个主要韧带和足底筋膜一起嵌入一定体积的软组织中。地点：康复工程中心的计算实验室。参与者：一名25岁左右的健康男性（体重，70公斤）。干预措施：不适用。主要结果指标：使用有限元模型预测足部支撑界面压力、骨结构中的von Mises应力和足底筋膜的应变。一个定制的模压，软（杨氏模量，E=0.3MPa）鞋垫减少了40.7%和31.6%的峰值足底压力分别在跖骨和脚跟区域相比，下一个平坦的，刚性（E= 1000 MPa）鞋垫。同时，足底的接触面积增加了59.7%，预测与相应的峰值足底压力增加22.2%，在midfoot.Conclusions：有限元分析表明，定制成型的形状是更重要的是在减少峰值足底压力比刚度的鞋垫材料。
Objective: To investigate the effect of material stiffness of flat and custom-molded insoles on plantar pressures and stress distribution in the bony and ligamentous structures during balanced standing.Design: A 3-dimensional (3-D) finite element model of the human ankle-foot complex and a custom-molded insole were developed from 3-D reconstruction of magnetic resonance images and surface digitization. The distal tibia and fibula, together with 26 foot bones and 72 major ligaments and the plantar fascia, were embedded in a volume of soft tissues.Setting: Computational laboratory in a rehabilitation engineering center.Participant: A healthy man in his mid twenties (weight, 70kg).Interventions: Not applicable.Main Outcome Measures: Foot-support interfacial pressure, von Mises stress in bony structures, and strain of the plantar fascia were predicted using the finite element model.Results: A custom-molded, soft (Young modulus, E=0.3MPa) insole reduced the peak plantar pressure by 40.7% and 31.6% at the metatarsal and heel region, respectively, compared with those under a flat, rigid (E=1000MPa) insole. Meanwhile, a 59.7% increase in the contact area of the plantar foot was predicted with a corresponding peak plantar pressure increase of 22.2% in the midfoot.Conclusions: The finite element analysis implies that the custom-molded shape is more important in reducing peak plantar pressure than the stiffness of the insole material.