4D Numerical Analysis of Scaffolds: A New Approach - Tissue Engineering: Computer Modeling, Biofabrication and Cell Behavior - page 87

Ta b l e 2 Material models parameters for different degradation time [ 53 ]
Material models Weeks D μ 1 μ 2 μ 3

Neo-Hookean 0 0 . 00 450 - -

2 0 . 18 410

4 0 . 33 364

8 0 . 55 364

16 0 . 80 630

Mooney-Rivlin 0 0 . 00 80 500 -

2 0 . 18 50

4 0 . 33 5

8 0 . 55 − 30

16 0 . 80 150

2nd reduced order 0 0 . 00 155 400 − 1

2 0 . 18 120

4 0 . 33 75

8 0 . 55 50

16 0 . 80 250

Fig. 11 Evolution of the
material parameter, μ 1 ,for
each model, considering
different degradation time
[ 53 ]

stress-strain plot, where the stiffness remains barely constant. This explains why
the material model parameter, μ 1 , increases sharply in the last degradation stage
(16 weeks) for all three models, because the inverse parameterization was based on
the experimental data that mostly comprehends elastic deformation.