## Elastic Properties of Human Body Soft Tissues

Numerical modelling of soft tissues requires gathering of experimental data of biomechanical properties of these bodies. In conducting studies on the properties of soft tissue, on large samples of research material (pork liver), Hu and Desai (2005) assumed that the tissue is a material that is incompressible, homogenous and isotropic.

Assuming the load force of the cubic sample as F, the elongation coefficient as X and the initial contact surface on the cube Ao, stresses a according to Cauchy were written in the form:

F

– = k, (8.104)

Ao

while strains e in the form:

s = lnQ. (8.105)

By dividing the experimental load-strain curve (Fig. 8.20) into small subregions, the authors noted that the dependence of force on movement is linear...

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