The proportionality coefficient ([k.sub.s]; Eqn 1) has been experimentally derived (Boiling 1987) and analytically related to the soil's Poisson ratio
such that [k.sub.s] is primarily a function of the soil's Poisson ratio
, v (Berli et al.
[[gamma].sub.2] is the Poisson ratio
of proppant 2, dimensionless;
(2) In this project, when elasticity modulus, Poisson ratio
, or wave impedance ratio of the foam concrete increases, the vibration reduction effect is lowered.
where [E.sub.L] is longitudinal Young modulus, [E.sub.T] is transverse Young modulus, v is in plane Poisson ratio
, [G.sub.P] is in plane shear modulus and [G.sub.T] is transverse shear modulus.
For the thermoplastic polymers, the plastic Poisson ratio
is usually ranged from 0.1 and 0.3, which means the volume does not keep constant during the plastic deformation.
Numerical properties of intra-aneurysmal pressure impact fluid velocity membrane displacement and the deformed radius with respect to the Poisson ratio
membrane thickness and extensional rigidity are studied.
Material properties Values Skeleton [3, 7] Young's modulus 3.72 GPa Poisson ratio
0.3 Density 1850 kg/[m.sup.3] Elastic modulus 0.5 GPa Muscle  Poisson ratio
0.4 Density 1000 kg/[m.sup.3]
For all the problems, the width of the beam is taken as unity and the shear correction factor and Poisson ratio
are taken to be 5/6 and 0.3, respectively.
That is why the value of the Poisson ratio
is practically constant and its minimum occurs for 30[degrees] (or 210[degrees]).
In most cases, the modeling errors due to the uncertainties in the material properties such as layer thickness, Poisson ratio
, unit weight, and damping ratio were not seriously considered while carrying out the inverse analysis using the FWD test data.
Relative to the original Poisson ratio
in the original EK model, the initial Poisson ratio
was 0, primarily because the sample started to compress.