...Afshin Anssari-Benam; Giuseppe Saccomandi The continuous softening behavior of the brain tissue, i.e., the softening in the primary loading path with an increase in deformation, is modeled in this work as a state of hyperelasticity up to the onset of failure. That is, the softening behavior...

...Ge He; Lei Fan; Yucheng Liu Two-dimensional mesoscale finite element analysis (FEA) of a multilayered brain tissue was performed to calculate the damage-related average stress triaxiality and local maximum von Mises strain in the brain. The FEA was integrated with rate-dependent hyperelastic...

... frozen for seven days and then measured. Seven indentations (various normalized displacements) were implemented with an indention rate of 0.1 mm/s. Solid phase aggregate modulus (E s ), hyperelastic material constant ( α ), and fluid load fraction (F′) of equine articular cartilage were assessed using...

... passive layer. The anisotropic passive layer, being topologically tied to the growing isotropic layer, causes the bending bar to twist laterally. The results of simulations demonstrate the validity of the automatically coded UMAT , used in both standardized tests of hyperelastic materials...

.... , and Aksel , N. , 2004 , “ A Class of Orthotropic and Transversely Isotropic Hyperelastic Constitutive Models Based on a Polyconvex Strain Energy Function ,” Int. J. Solids Struct. 0020-7683 10.1016/j.ijsolstr.2004.02.027 , 41 , pp. 3833 – 3848 . Schroder , J. , and Neff , P. , 2003...

... of saccular cerebral aneurysms from 27 patients (18 unruptured and nine ruptured) was reconstructed based on computer tomography angiography images. The aneurysm wall tissue was modeled using a nonlinear, anisotropic, hyperelastic material model (Fung-type) which was incorporated in a user subroutine...

... rigidity of a cell with nonlinear mechanical properties is deduced from the mechanical response of the entire population of adherent cells. The proposed hyperelastic cell model successfully accounts for the variability in probe-cell geometrical features, and the influence of the cell–substrate adhesion...