Table 3.
Calibrated parameters and prior distribution hyperparameters of stochastic Ogden-type models for mouse brain tissue, and the corresponding random linear shear modulus of (2.14). The parameters are estimated by following the two-step strategy presented in §3.
stochastic model for mouse brain tissue | calibrated parameters (mean ± s.d.) | calibrated hyperparameters of prior probability distribution | random shear modulus (kPa) (mean ± s.d.) |
---|---|---|---|
one-term (two-parameter) Ogden (5.1) | c1=0.2454±0.0185 | ρ1=175.6736 | |
α1=−2.2111 | ρ2=0.0014 | ||
three-term (three-parameter) Ogden (5.4) | c1=−1.1192±0.0255 | ρ1=49.0153 | |
c2=0.8167±0.0059 | ρ2=0.0046 | ||
b=−3 | c3=0.5291±0.0009 | ξ1=7919 | |
ξ2=153 488 | |||
ξ3=99 997 | |||
four-term (four-parameter) Ogden (5.4) | c1=−2.3043±0.3939 | ρ1=57.7743 | |
c2=1.7865±0.3491 | ρ2=0.0037 | ||
b=−5 | c3=1.1016±0.2035 | ξ1=40 | |
c4=−0.3687±0.1305 | ξ2=266 | ||
ξ3=685 | |||
ξ4=294 | |||
five-term (five-parameter) Ogden (5.4) | c1=−4.4681±0.0960 | ρ1=51.4814 | |
c2=2.5410±0.2452 | ρ2=0.0041 | ||
b=−10 | c3=3.4361±0.1178 | ξ1=2771 | |
c4=−0.5959±0.0992 | ξ2=2086 | ||
c5=−0.7041±0.0969 | ξ3=8388 | ||
ξ4=6569 | |||
ξ5=4502 |