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首页> 外文期刊>Medical engineering & physics. >Effects of internal stress concentrations in plantar soft-tissue-A preliminary three-dimensional finite element analysis.
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Effects of internal stress concentrations in plantar soft-tissue-A preliminary three-dimensional finite element analysis.

机译：足底软组织内应力集中的影响-初步的三维有限元分析。

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摘要

It has been hypothesized that diabetic foot ulceration might be internally initiated. This study established a three-dimensional and nonlinear finite element model of a human foot complex with comprehensive skeletal and soft-tissue components. The model was validated by experimental data of subject-specific barefoot plantar pressure measurements. The feasibility of the model to predict the 3D, internal, plantar soft-tissue deformation and stress was evaluated. The preliminary results indicate that large von Mises stress occurs where plantar soft-tissue contacts with geometrically irregular bony structures, thus internal stress distribution within the plantar soft-tissue was dramatically influenced by bony prominences due to stress concentration. At the forefoot part, an average stress magnification factor of 3.01 was quantified. The lateral sesamoid bone associated to the 1st MTH showed the largest effect of stress concentration. The modeling approach presented provides a possible way to explore the complexity of the mechanical environment inside the plantar soft-tissue.
机译：据推测，糖尿病足溃疡可能是内部引发的。这项研究建立了具有全面骨骼和软组织成分的人足复合体的三维非线性有限元模型。该模型已通过针对特定受试者的赤脚足底压力测量的实验数据进行了验证。评价了该模型预测3D，内部，足底软组织变形和应力的可行性。初步结果表明，大的冯米塞斯应力发生在足底软组织与几何形状不规则的骨结构接触的地方，因此，由于应力集中，骨突出物显着影响了足底软组织内的内部应力分布。在前脚部分，平均应力放大系数为3.01。与第一甲状旁腺相关的外侧lateral骨显示出最大的应力集中效应。提出的建模方法提供了一种探索足底软组织内部机械环境复杂性的可能方法。

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