Table 3.

Experimental (target) and numerical (effective) parameters of the bivariate von Mises distributions for the three microstructural stages of the arterial tissue considered in the present study. Values are given as medians and interquartile ranges.

	healthy adventitia		early AAA		late AAA
	exp. [39]	num.	exp. [40]	num.	exp. [40]	num.
	(n=16)	(n=5)	(n=6)	(n=5)	(n=6)	(n=5)
α (deg)	77.53	77.35	6.55	7.59	0.00a	0.00
	[67.04–84.02]	[73.46–79.92]	[5.19–11.62]	[5.88–8.41]		[0.00–0.00]
κip (−)	0.232	0.217	0.242	0.236	0.500a	0.500
	[0.192–0.282]	[0.205–0.239]	[0.234–0.260]	[0.231–0.259]		[0.500–0.500]
κop (−)	0.466	0.468	0.433	0.432	0.402	0.401
	[0.459–0.479]	[0.465–0.471]	[0.425–0.441]	[0.432–0.435]	[0.379–0.421]	[0.400–0.403]

^aAssuming an isotropic in-plane fibre dispersion, κ_ip = 0.5 and the mean in-plane angle α becomes superfluous.