Table 2:

Parameters for the neo-Hookean, Demiray (Delfino) and two-fiber family HGO models describing average responses of human TAs in 7 age groups. A total of 19 different loading protocols were used to determine constitutive parameters in these models.

	neo-Hookean model		Demiray (Delfino) model
Age group (years)	μ, kPa	R2	D1, kPa	D2	R2
15.3 (13–20)	47.55	0.91	35.45	0.96	0.95
24.4 (21–30)	49.40	0.90	35.47	1.21	0.94
36.0 (31–40)	46.33	0.85	28.92	1.53	0.93
46.5 (41–50)	51.10	0.84	33.78	1.73	0.91
54.9 (51–60)	57.77	0.81	37.47	2.32	0.87
66.5 (61–70)	59.60	0.79	35.03	3.24	0.87
73.2 (71–78)	63.80	0.71	33.04	5.05	0.80
Two-fiber family HGO model
Age group (years)	Cgr, kPa	${\mathit{C}}_{\mathbf{1}}^{\mathbf{1}}={\mathit{C}}_{\mathbf{1}}^{\mathbf{2}},\mathit{k}\mathit{P}\mathit{a}$	${\mathit{C}}_{\mathbf{2}}^{\mathbf{1}}={\mathit{C}}_{\mathbf{2}}^{\mathbf{2}}$	${\mathit{\gamma }}^{°}$	R2
15.3 (13–20)	41.69	1.20	2.56	56.18	0.95
24.4 (21–30)	41.82	1.78	2.61	54.46	0.94
36.0 (31–40)	40.32	0.16	6.58	28.66	0.91
46.5 (41–50)	44.94	0.24	9.33	25.80	0.92
54.9 (51–60)	49.91	0.22	16.17	24.65	0.91
66.5 (61–70)	51.13	0.34	17.83	26.37	0.89
73.2 (71–78)	51.68	0.51	27.99	29.24	0.85