Table 2 Comparison of mechanical behavior between damage models and experiments (sample size for each cell = 20). All strain values are reported as Lagrange strain.

From: Finite element modeling of meniscal tears using continuum damage mechanics and digital image correlation

 

Longitudinal

Transverse

Experiment

Model (von Mises stress)

Model (max normal strain)

Experiment

Model (von Mises stress)

Model (max normal strain)

Ultimate tensile force (N)

2.25 ± 1.42

2.25 ± 1.41

2.23 ± 1.39

0.100 ± 0.066

0.103 ± 0.068

0.100 ± 0.066

Ultimate tensile stretch (grip-to-grip)

1.155 ± 0.052

1.153 ± 0.053

1.155 ± 0.052

1.493 ± 0.214

1.491 ± 0.212

1.491 ± 0.216

Normal strain Eyy

(tear region at UTS)

0.29 ± 0.14

0.26 ± 0.11

0.27 ± 0.10

3.64 ± 3.30

1.00 ± 0.46*

1.02 ± 0.54*

Normal strain E

(tear region at UTS)

0.01 ± 0.16

− 0.09 ± 0.07*

− 0.07 ± 0.03*

− 0.21 ± 0.31

− 0.15 ± 0.06

− 0.15 ± 0.06

Shear strain E

(tear region at UTS)

0.20 ± 0.10

0.14 ± 0.12

0.09 ± 0.06*

0.529 ± 0.620

0.017 ± 0.011*

0.015 ± 0.008*

1st principle strain

(tear region at UTS)

0.42 ± 0.14

0.31 ± 0.16*

0.29 ± 0.12*

3.78 ± 3.35

1.00 ± 0.46*

1.02 ± 0.54*

2nd principle strain

(tear region at UTS)

− 0.13 ± 0.10

− 0.14 ± 0.12

− 0.10 ± 0.05

− 0.34 ± 0.08

− 0.15 ± 0.06*

− 0.15 ± 0.06*

Max shear strain

(tear region at UTS)

0.28 ± 0.10

0.23 ± 0.13

0.19 ± 0.08*

2.06 ± 1.70

0.57 ± 0.25*

0.59 ± 0.29*

  1. Bolded values with an * are significantly lower than experimental data within either the Longitudinal or Transverse group (p < 0.001).