0937 骨格筋マイクロ要素における異方損傷を考慮した力学モデルの定式化(S05-2 生体のシミュレーション・モデリング・計測(2),S05 生体のシミュレーション・モデリング・計測)

概要

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This study aimed to develop a three-dimensional constitutive model of skeletal muscle that describes anisotropy of deformation, viscoelasticity, and damage evolution. Muscle tissue has a transverse isotropic structure. We describe anisotropy of the mechanical properties of muscle using a structural tensor. Free energy function of muscle is defined and decoupled into the volumetric, isochoric elastic and isochoric viscoelastic contribution. The viscoelastic part is modeled as a three-dimensional viscoelastic model that is constructed by extending one-dimensional rheological model. Based on the framework of continuum damage mechanics, the anisotropic damage of muscle tissue is described by a damage tensor of second rank. To represent the effects on muscle activity, we incorporate a contractile element into the model. The active stress is defined as a first Piola-Kirchhoff stress tensor considering the mechanism of muscle force generation.
社団法人日本機械学会の論文
2007-09-07