Table 2. Intraclass correlation coefficients for mechanical properties.

Overall	Mechanical properties
	Failure load	Ultimate failure	Displacement	Stiffness	Energy
Failure load	1.000	0.889	0.833	0.422	0.719
Ultimate failure	0.889	1.000	0.736	0.415	0.775
Displacement	0.833	0.736	1.000	0.110	0.800
Stiffness	0.422	0.415	0.110	1.000	0.206
Energy	0.719	0.775	0.800	0.206	1.000

0.00–0.19, very weak; 0.20–0.39, weak; 0.40–0.59, moderate; 0.60–0.79, strong; 0.80–1.00, very strong.