Effects of temperature, strain rate, and vacancies on tensile and fatigue behaviors of silicon-based nanotubes

Temperature and strain-rate dependent fracture strength of graphene

“…With the AIREBO potential, the bonding energy and the activation volume show a negligible variation with temperature. Accordingly, we define U 0 = 4.94 eV and ␥ = 8.49 Å 3 , with the assumption of q =1. Since the strain-stress relation has a minor variation with temperature, using the least-squares technique, we calculate a = 1.11ϫ 10 11 Pa and b = 9.69 for the NLE behavior given in ͓Eq.…”

“…The mechanical properties of nanostructures, especially their stiffness and strength, need to be carefully understood as they can be the key factors in determining the stability and lifetime of many potential NEMS applications. Extensive experimental and numerical simulations have been performed to understand mechanical properties of nanostructures including carbon nanotube ͑CNT͒, 1,2 silicon nanotube ͑SiNT͒, 3 GaN nanotube ͑GaNNT͒, 4 silicon carbide ͑␤-SiC͒ nanowire, 5,6 silicon nitride ͑␣-Si 3 N 4 ͒ nanowire, 7 Gold nanowire, 8,9 Pd-Pt nanowire, 10 and glass silica nanowire. 11 The ultimate strength of these nanostructures have been measured or calculated to be 11-83 GPa for CNT, 7-10 GPa for SiNT, 18-66 GPa for GaNNT, 17-110 GPa for ␤-SiC, GPa for ␣-Si 3 N 4 , 2-8 GPa for gold nanowires, 8-18 GPa for Pd-Pt nanowires and 9-26 GPa for glass silica nanowires.…”

Hexagonal silicon nanotube confined inside a carbon nanotube: A first-principles study

“…This situation is clearly seen in single-walled silicon nanotube. Nevertheless, single-walled SiNT has been proven to be of intriguing structural and electronic properties based on various theoretical calculations [13][14][15][16][17][18][19][20][21][22][23]. Of them, Bai et al [24] proposed a fantastic model of single-walled SiNT with infinite stacked polygons, which is locally stable in vacuum.…”

Effects of surface morphology, size effect and wettability on interfacial adhesion of carbon nanotube arrays

“…Note that the loading/unloading rate might affect the time-dependent viscoelastic deformation and mechanical softening of nanotube materials. However, it is not thought to play a role in the elastic response of nanotubes [42][43][44][45].…”