Table 1.

Fung strain energy equation material constants, ${\mathcal{A}}_2$/${\mathcal{A}}_1$ values, and R² values for the average, upper, and lower limit dataset for the G:PCL characterization constructs (80G:20PCL, 50G:50PCL, and 20G:80PCL) and the T:PCL characterization constructs (80T:20PCL, 50T:50PCL, and 20T:80PCL). R² values compare the Fung equation surface plots to the averaged surface data for all three replicates for the respective experimental group. These material constants are determined based on a multivariable error minimization function and as such are covariant for each dataset. In other words, the relative values of parameter c and the other material constants may independently increase or decrease to achieve an adequate fit to the data. Therefore, the values of the c parameter may not necessarily be consistent with the trend of the labels: upper limit, average, and lower limit.

Group	Dataset	c (MPa)	$\mathcal{A}$1	$\mathcal{A}$2	$\mathcal{A}$3	$\mathcal{A}$2/$\mathcal{A}$1	R2
20G:80PCL	Upper limit	77.9	0.051	0.26	0.044	5.2	0.99
	Average	146.9	0.020	0.12	0.016	6.1	0.99
Lower limit	14.1	0.122	1.01	0.088	8.3	0.99
50G:50PCL	Upper limit	93.7	0.012	0.065	0.009	5.6	0.98
	Average	21.6	0.044	0.22	0.034	4.9	0.98
Lower limit	72.5	0.011	0.045	0.009	4.0	0.96
80G:20PCL	Upper limit	70.9	0.003	0.027	0.001	9.5	0.98
	Average	1.3	0.119	1.063	0.057	9.0	0.98
Lower limit	0.2	0.502	3.95	0.23	8.0	0.97
20T:80PCL	Upper limit	302.2	0.024	0.063	0.015	2.6	0.81
	Average	3.3	1.621	4.79	1.034	3.0	0.81
Lower limit	0.3	9.208	29.434	5.723	3.2	0.92
50T:50PCL	Upper limit	57.2	0.073	0.260	0.047	3.6	0.80
	Average	4.5	0.834	2.834	0.545	3.4	0.80
Lower limit	0.8	3.982	11.744	2.589	3.0	0.87
80T:20PCL	Upper limit	319.7	0.004	0.021	0.002	5.1	0.99
	Average	13.2	0.092	0.461	0.052	5.0	0.99
Lower limit	272.2	0.004	0.021	0.002	5.0	0.99