Tensile Behavior of Carbon Fiber-Reinforced Polymer Composites Incorporating Nanomaterials after Exposure to Elevated Temperature

Table 2

Tensile test results of the CFRP test specimens.

Specimens	Mechanical parameters
	^1 (GPa)	SD^2	(MPa)	SD		SD	Toughness (MPa·mm/mm)	SD
CFRP	53.34	4.30	492.32	12.45	0.0144	0.00082	3.60	0.28
MWCNT-CFRP	41.55	2.32	528.69	6.42	0.0174	0.00068	4.59	0.22
GnPs-CFRP	41.87	5.89	490.31	36.32	0.0164	0.00027	4.02	0.36
S-MWCNT-COOH-CFRP	44.98	8.40	604.35	55.95	0.0212	0.00027	6.40	0.66
S-MWCNT-COOH-CFRP-T50	42.54	5.71	502.17	40.92	0.0190	0.00155	4.80	0.72
S-MWCNT-COOH-CFRP-T100	47.74	7.22	383.87	32.86	0.0133	0.00091	2.56	0.32
S-MWCNT-COOH-CFRP-T150	50.43	8.74	417.77	39.54	0.0144	0.00067	3.02	0.39
S-MWCNT-COOH-CFRP-T200	44.77	10.30	403.18	13.03	0.0130	0.00087	2.62	0.16

¹Initial stiffness (or elastic modulus) at 30% of the peak strength in the ascending branch. ²Standard deviation.