Theoretical Investigation on Failure Strength and Fracture Toughness of Precracked Single-Layer Graphene Sheets

Table 3

The comparison between present works with those of the literature (includes Young’s moduli, failure strength, failure strain, and fracture toughness).

Method	Young’s moduli (GPa)	Type	Failure strength (GPa)	Failure strain	Fracture toughness ()
Experiment [11, 29]				0.25	4.0
MD [19, 33]		Armchair	107	0.2	3.38
		Zigzag	90	0.13
Ab initio calculation [30]	1050	Armchair	121	0.266	—
		Zigzag	110	0.194
MD [20, 38]	855	—	—	—	3.1
Molecular structure mechanics [17, 22]	1040	—	—	—	3.34
MD [13, 39]	—	Armchair	127	0.22	3.2
		Zigzag	123	0.23
Molecular structure mechanics [18]	—	Armchair	100.47	0.23	—
		Zigzag	79.82	0.22
Theory [11]	—	—	—	—	3.2
Present works	1022.54	Armchair	111.9	0.23	3.20-3.37
		Zigzag	88.1	0.22