title: Simulation of active skeletal muscle tissue with a transversely isotropic viscohyperelastic continuum material model.
abstract: Human body models with biofidelic kinematics in vehicle pre-crash and crash simulations require a constitutive model of muscle tissue with both passive and active properties. Therefore, a transversely isotropic viscohyperelastic continuum material model with element-local fiber definition and activation capability is suggested for use with explicit finite element codes. Simulations of experiments with New Zealand rabbit's tibialis anterior muscle at three different strain rates were performed. Three different active force-length relations were used, where a robust performance of the material model was observed. The results were compared with the experimental data and the simulation results from a previous study, where the muscle tissue was modeled with a combination of discrete and continuum elements. The proposed material model compared favorably, and integrating the active properties of the muscle into a continuum material model opens for applications with complex muscle geometries.
authors: Department of Applied Mechanics, Chalmers University of Technology, Sweden.
authors: Hamid
authors: H
authors: Khodaei
authors: Salar
authors: S
authors: Mostofizadeh
authors: Karin
authors: K
authors: Brolin
authors: Håkan
authors: H
authors: Johansson
authors: Jonas
authors: J
authors: Osth
mesh_terms: D003198:Computer Simulation; D055119:Elastic Modulus / Q000502:physiology; D006801:Humans; D008953:Models, Anatomic; D008954:Models, Biological; D009119:Muscle Contraction / Q000502:physiology*; D018482:Muscle, Skeletal / Q000033:anatomy & histology* / Q000502:physiology*; D013314:Stress, Mechanical; D013718:Tensile Strength / Q000502:physiology; D014783:Viscosity
keywords: Muscle activation; animal model; finite element; hyperelasticity; transversely isotropy; viscoelasticity