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Experimental characterisation of neural tissue at collision speeds
(International Research Council on Biomechanics of Injury (IRCOBI), 2012)
Mechanical characterisation of brain tissue at high loading velocities is particularly important for modelling Traumatic Brain Injury (TBI). During severe impact conditions, brain tissue experiences a mixture of compression, ...
Interface waves in pre-stressed incompressible solids
(Springer, 2007)
We study incremental wave propagation for what is seemingly the simplest boundary value problem, namely that constitued by the plane interface of a semi-infinite solid. With a view to model loaded elastomers and soft ...
Incremental equations for soft fibrous materials
(Springer, 2015)
The general theory of nonlinear anisotropic elasticity
is extended to describe small-amplitude motions and static deformations
that can be superimposed on large pre-strains of fibre-reinforced
solids. The linearised ...
Mechanical properties of excised human skin
(Springer Verlag, 2010)
In this study we have investigated in influence of
location, gender and orientation on the deformation characteristics
of 55 samples of human excised skin. Uniaxial tensile
tests were carried out at a strain rate of ...
Gent models for the inflation of spherical balloons
(Elsevier, 2015)
We revisit an iconic deformation of non-linear elasticity: the inflation of a rubber spherical thin shell. We use the 3-parameter Mooney and Gent-Gent (GG) phenomenological models to explain the stretch-strain curve of a ...
Extreme softness of brain matter in simple shear
(Elsevier, 2015-03-13)
We show that porcine brain matter can be modelled accurately as a very soft rubber-like material using the Mooney-Rivlin strain energy function, up to strains as high as 60%. This result followed from simple shear experiments ...
Large acoustoelastic effect
(Elsevier, 2012-03)
Classical acoustoelasticity couples small-amplitude elastic wave propagation to an infinitesimal pre-deformation, in order to reveal and evaluate non-destructively third-order elasticity constants. Here, we see that ...
Slight compressibility and sensitivity to changes in Poisson's ratio
(2012)
Finite element simulations of rubbers and biological soft tissue usually assume that the material being deformed is slightly compressible. It is shown here that, in shearing deformations, the corresponding normal stress ...
A high rate tension device for characterizing brain tissue
(SAGE Journals, 2012-03-08)
The mechanical characterization of brain tissue at high loading velocities is vital for understanding and modeling traumatic brain injury. The most severe form of traumatic brain injury is diffuse axonal injury, which ...
Simple shear is not so simple
(2012-03)
For homogeneous, isotropic, non-linearly elastic materials, the form of the homogeneous deformation consistent with the application of a Cauchy shear stress is derived here for both compressible and incompressible materials. ...