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Simulation of active skeletal muscle tissue with a transversely isotropic viscohyperelastic continuum material model

Hamid Khodaei (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik) ; Salar Mostofizadeh (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik) ; Karin Brolin (Institutionen för tillämpad mekanik, Fordonssäkerhet ; SAFER - Fordons- och Trafiksäkerhetscentrum ) ; Håkan Johansson (Institutionen för tillämpad mekanik, Dynamik) ; Jonas Östh (Institutionen för tillämpad mekanik, Fordonssäkerhet ; SAFER - Fordons- och Trafiksäkerhetscentrum )
Proceedings of the Institution of mechanical engineers. Part H, journal of engineering in medicine (0954-4119). Vol. 227 (2013), p. 571-580.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Muscle activation, animal model, finite element, viscoelasticity, hyperelasticity, transversely isotropy



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Denna post skapades 2013-02-22. Senast ändrad 2014-09-29.
CPL Pubid: 173982

 

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