Table 2.
Geometric measurements, distribution function parameters, and material constants (± 95% confidence interval) determined by the least-squares fit to the stress-stretch data from uniaxial testing of rabbit carotidarteries, with averages of parameters.
| Sample | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | AVG |
|---|---|---|---|---|---|---|---|---|---|
| Geometry | |||||||||
| C (mm) | 4.3 | 4.2 | 4.0 | 4.2 | 4.0 | 4.3 | 4.5 | 4.2 | 4.2 |
| L0 (mm) | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 |
| w (mm) | 4.4 | 3.6 | 5.0 | 3.9 | 3.8 | 4.3 | 4.3 | 3.7 | 4.1 |
| H (μm) | 112 | 134 | 124 | 116 | 96 | 154 | 102 | 102 | 118 |
| Model A | |||||||||
| λa1 | 1.70 | 1.45 | 1.40 | 1.50 | 1.60 | 1.50 | 1.80 | 1.80 | 1.59 |
| η0(kPa) | 120 ±31 | 96 ± 38 | 150 ± 27 | 220 ± 32 | 220 ± 69 | 130 ± 26 | 87 ± 33 | 110 ± 63 | 140 |
| η(GPa) | 5.5 ± 13 | 0.13 ± 0.081 | 0.49 ± 0.26 | 2.0 ± 1.6 | 3.1 ± 8.7 | 5.4 ± 8.6 | 6.5 ± 9.8 | 6.2 ± 18 | 9.8 |
| γ | 19 ± 6.7 | 15 ± 2.9 | 23 ± 2.9 | 21 ± 3.2 | 18 ± 8.6 | 24 ± 5.8 | 20 ± 4.3 | 18 ± 7.6 | 20 |
| R2 | 0.9974 | 0.9990 | 0.9994 | 0.9993 | 0.9965 | 0.9989 | 0.9972 | 0.9940 | |
| Model B | |||||||||
| λa1 | 1.70 | 1.45 | 1.40 | 1.50 | 1.60 | 1.50 | 1.80 | 1.80 | 1.59 |
| η0(kPa) | 140 ± 28 | 100 ± 35 | 160 ± 25 | 230 ± 27 | 230 ± 66 | 140 ± 26 | 140 ± 17 | 160 ± 52 | 160 |
| η(MPa) | 3.4 ± 1.6 | 2.6 ± 0.8 | 1.3 ± 0.4 | 4.5 ± 1.1 | 11 ± 5.8 | 3.1 ± 1.4 | 0.36 ± 0.16 | 3.4 ± 2.3 | 3.7 |
| γ | 6.0 ± 2.2 | 3.8 ± 1.1 | 6.8 ± 1.0 | 4.8 ± 1.1 | 2.7 ± 3.2 | 6.3 ± 2.4 | 8.7 ± 0.97 | 6.4 ± 2.4 | 5.7 |
| R2 | 0.9977 | 0.9990 | 0.9994 | 0.995 | 0.9966 | 0.9988 | 0.9990 | 0.9950 | |
| Model C | |||||||||
| λa1 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| α | 32 ± 39 | 16 ± 3.3 | 130 ± 74 | 8.3 ± 5.3 | 62 ± 40 | 14 ± 36 | 40 ± 46 | 24 ± 41 | 41 |
| β ( × 10−3) | 34 ± 45 | 65 ± 14 | 6.0 ± 3.4 | 180 ± 150 | 14 ± 9.0 | 110 ± 360 | 22 ± 26 | 41 ± 74 | 59 |
| R2 | 0.9287 | 0.9977 | 0.9944 | 0.9755 | 0.9886 | 0.8718 | 0.9403 | 0.8585 | |
| η0(kPa) | 130 ± 24 | 83 ± 28 | 140 ± 40 | 110 ± 52 | 230 ± 55 | 120 ± 24 | 77 ± 38 | 75 ± 62 | 120 |
| η(MPa) | 22 ± 2.1 | 15 ± 1.0 | 4.2 ± 0.45 | 54 ± 5.2 | 12 ± 1.3 | 120 ± 11 | 6.3 ± 0.79 | 17 ± 2.5 | 31 |
| R2 | 0.9977 | 0.9991 | 0.9978 | 0.9982 | 0.9969 | 0.9988 | 0.9947 | 0.9930 | |
| Model D | |||||||||
| λa1 | 1.70 | 1.45 | 1.40 | 1.50 | 1.60 | 1.50 | 1.80 | 1.80 | 1.59 |
| α | 2.5 ± 3.0 | 2.4 ± 0.22 | 9.4 ± 5.3 | 1.1 ± 0.018 | 3.3 ± 1.3 | 2.0 ± 3.8 | 3.5 ± 3.5 | 1.5 ± 2.3 | 3.2 |
| β ( × 10−2) | 67 ± 120 | 54 ± 6.5 | 5.4 ± 3.1 | 530 ± 23 | 22 ± 9.2 | 250 ± 1000 | 22 ± 24 | 74 ± 160 | 130 |
| R2 | 0.9198 | 0.9996 | 0.9942 | 1.0000 | 0.9957 | 0.9012 | 0.9568 | 0.8809 | |
| η0(kPa) | 140 ± 240 | 110 ± 28 | 140 ± 47 | 180 ± 44 | 260 ± 53 | 140 ± 23 | 90 ± 40 | 110 ± 60 | 150 |
| η(MPa) | 84 ± 8.0 | 37 ± 2.6 | 11 ± 1.4 | 150 ± 14 | 47 ± 5.5 | 390 ± 36 | 20 ± 2.8 | 46 ± 7.0 | 98 |
| R2 | 0.9976 | 0.9990 | 0.9972 | 0.9984 | 0.9969 | 0.9987 | 0.9939 | 0.9927 | |
C = vessel circumference, L0 = specimen initial length, w = specimen width, H = thickness.