[Insight-users] IA-FEMesh Modulus & Poisson Ratio

[Matt McCormick]

Hi H.B.,
 
> From ware could i get Modulus & Poisson Ratio values for Organ like Liver
Blader ....
> As i read The Poisson's ratio of a stable, isotropic, linear
elastic material cannot be less than −1.0 nor greater than 0.5.  

The Poisson's Ratio of most naturally occurring materials are greater than
zero.  There are some fabricated materials that have a negative Poisson's
Ratio.  http://silver.neep.wisc.edu/~lakes/Poisson.html

Most biological soft tissues are considered nearly incompressible, i.e.
Poisson's Ratio of ~0.5.  For finite element modeling, a value less that 0.5
should be chosen, e.g. 0.495, to avoid problems.

Young's modulus values for soft tissues are usually on the order of 10's of
kPa, but you will need to find an article where mechanical testing was done on
your tissue of interest.

Matt