Table 1.

Specimen Specific Principal Components of K

	Specimen	1	2	3	4	5	6	7	8
1st Principal Component	Stiffness [N/mm]	20.8	17.5	12.7	16.0	14.5	22.0	19.6	8.1
	Azimuth [deg]	−4.1	1.9	6.0	−0.9	−5.8	−7.8	0.7	−17.1
	Elevation [deg]	33.0	36.2	35.9	32.4	38.8	33.1	33.9	49.7
2nd Principal Component	Stiffness [N/mm]	3.6	3.1	3.2	3.5	2.2	2.7	4.7	1.9
	Azimuth [deg]	−44.2	−23.0	−24.7	−82.4	−73.6	−34.0	−80.4	−39.2
	Elevation [deg]	−49.6	−51.0	−49.9	−13.1	−25.2	−54.0	−12.9	−38.1
3rd Principal Component	Stiffness [N/mm]	3.0	2.6	2.5	2.9	2.1	2.5	3.3	1.8
	Azimuth [deg]	71.9	82.7	84.5	26.6	40.3	73.9	27.2	59.6
	Elevation [deg]	−20.5	−12.3	−15.4	−54.5	−40.7	−12.6	−53.1	−11.0