A visco-hyperelastic constitutive model and its application in bovine tongue tissue

Ali-Akbar Karkhaneh Yousefi 1, * Mohammad Ali Nazari 1, * Pascal Perrier 2 Masoud Shariat Panahi 1 Yohan Payan 3
* Corresponding author
2 GIPSA-PCMD - PCMD
GIPSA-DPC - Département Parole et Cognition
3 TIMC-IMAG-GMCAO - Gestes Medico-chirurgicaux Assistés par Ordinateur
TIMC-IMAG - Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525
Abstract : Material properties of the human tongue tissue have a significant role in understanding its function in speech, respiration, suckling, and swallowing. Tongue as a combination of various muscles is surrounded by the mucous membrane and is a complicated architecture to study. As a first step before the quantitative mechanical characterization of human tongue tissues, the passive biomechanical properties in the superior longitudinal muscle (SLM) and the mucous tissues of a bovine tongue have been measured. Since the rate of loading has a sizeable contribution to the resultant stress of soft tissues, the rate dependent behavior of tongue tissues has been investigated via uniaxial tension tests (UTTs). A method to determine the mechanical properties of transversely isotropic tissues using UTTs and inverse finite element (FE) method has been proposed. Assuming the strain energy as a general nonlinear relationship with respect to the stretch and the rate of stretch, two visco-hyperelastic constitutive laws (CLs) have been proposed for isotropic and transversely isotropic soft tissues to model their stress-stretch behavior. Both of them have been implemented in ABAQUS explicit through coding a user-defined material subroutine called VUMAT and the experimental stress-stretch points have been well tracked by the results of FE analyses. It has been demonstrated that the proposed laws make a good description of the viscous nature of tongue tissues. Reliability of the proposed models has been compared with similar nonlinear visco-hyperelastic CLs.
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Submitted on : Tuesday, March 27, 2018 - 8:10:51 AM
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Ali-Akbar Karkhaneh Yousefi, Mohammad Ali Nazari, Pascal Perrier, Masoud Shariat Panahi, Yohan Payan. A visco-hyperelastic constitutive model and its application in bovine tongue tissue. Journal of Biomechanics, Elsevier, 2018, 71, pp.190 - 198. ⟨10.1016/j.jbiomech.2018.02.008⟩. ⟨hal-01744059⟩

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