Mechanical properties of bonded few-layered graphene via uniaxial test: A molecular dynamics simulation study

Tunable ductility of a nano-network from few-layered graphene bonded with benzene: a molecular dynamics study

“…For example, at temperature below 100 K, the two surface layers have the critical strain of ~19%. However, the value of 1 st ɛc reduces to 16.4% at 300 K or 13.6% at 500 K, which is lower than 21% of the pristine graphene at 300 K [16] . This reduction of strength is due to the existence of sp 3 bonds that connect surface layers and core layers via benzene molecules.…”

“…It is known that ductility is one of the most important mechanical properties of a material, which indeed illustrates its capacity of plastic deformation before rupture under tension. However, researches showed that the critical strains of pristine graphene ribbon along the armchair/zigzag directions are about 21%/14% at room temperature, respectively [16] . Once the stretching strain exceeds the critical value, it breaks in brittle style.…”

“…In the reports by Liu et al, 17,18 the irradiation method was adopted to form carbon networks from multi-layered graphene. Shi et al 19 formed a new carbon network from few-layered graphene by the shot peening method. The bonded graphene ribbon has no relative sliding between adjacent layers.…”

“…The literature indicates that when a pristine graphene ribbon is under uniaxial tension along the armchair and zigzag directions, its critical fracture strains are about 14% and 21%, respectively, at room temperature. 19,23 Once the stretching strain exceeds the corresponding critical value, it breaks in brittle style. As a result, the low ductility hampers the pristine graphene's application in a nanostructure/nanodevice with large deformation.…”

“…In the reports of Liu and his colleagues [14,15] , irradiation methods are adopted to form carbon networks from multi-layered graphene. With shot peening method, Shi et al [16] suggested to form a new carbon network from few-layered graphene, in which the bending stiffness was improved. By bonding two twisted layers of graphene, Chen et al [17] formed a nanocomposite superstructure.…”