Table 1.

Theoretically and experimentally motivated constraints placed on model parameters during the data fitting process

Model	Parameter	Constraint	References
Material
GOH & SHR	$(1-\mathit{\varphi })\mathit{\mu }$	$>0$
GOH	$\mathit{\varphi }{c}_1^c$ and $c_2^c$	$>0$
SHR	$\mathit{\varphi }E$	0–14 GPa	Andriotis et al. (2015)
FR	$E^{\mathrm{C}}$	$>0$
FR	$E^{\mathrm{E}}$	$>0$
Structural
GOH	$\mathit{\kappa }$	0–1/3	Gasser et al. (2006)
GOH	$\mathit{\xi }$	0–$\mathit{\pi }/2$
SHR	${\mathit{\theta }}_0$	0–$\mathit{\pi }/2$	Shearer (2015)
SHR	$\mathit{\psi }$	0–$\mathit{\pi }/2$
FR	$\mathit{\beta }$	10–1000