Yousefi Ali-Akbar Karkhaneh, Nazari Mohammad Ali, Perrier Pascal, Panahi Masoud Shariat, Payan Yohan
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran.
Univ. Grenoble Alpes, CNRS, Grenoble INP, Gipsa-lab, F38000 Grenoble, France.
J Biomech. 2018 Apr 11;71:190-198. doi: 10.1016/j.jbiomech.2018.02.008. Epub 2018 Feb 13.
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.
人类舌组织的材料特性对于理解其在言语、呼吸、哺乳和吞咽中的功能具有重要作用。舌头作为多种肌肉的组合，被黏膜所包围，是一个复杂的研究结构。作为对人类舌组织进行定量力学表征的第一步，已经测量了牛舌上纵肌（SLM）和黏膜组织的被动生物力学特性。由于加载速率对软组织的合成应力有相当大的影响，通过单轴拉伸试验（UTT）研究了舌组织的速率依赖性行为。提出了一种使用UTT和逆有限元（FE）方法来确定横观各向同性组织力学性能的方法。假设应变能是关于拉伸和拉伸速率的一般非线性关系，针对各向同性和横观各向同性软组织提出了两种粘弹性超弹性本构定律（CL）来模拟它们的应力-拉伸行为。通过编写一个名为VUMAT的用户定义材料子程序，这两种定律都在ABAQUS显式中实现，有限元分析结果很好地跟踪了实验应力-拉伸点。结果表明，所提出的定律很好地描述了舌组织的粘性特性。已将所提出模型的可靠性与类似的非线性粘弹性超弹性CL进行了比较。
