Effects of carbon nanotube structures on mechanical properties

Natsuki, Toshiaki; Tantrakarn, Kriengkamol; Endo, Morinobu

doi:10.1007/s00339-003-2492-y

Cited by 128 publications

(77 citation statements)

References 31 publications

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“…For set 2 MWCNTs, Young's modulus as well as buckling strain is more sensitive to the outer diameter than the wall number. Again the dependence of Young's modulus on wall number for the set 2 MWCNTs is also confirmed by other researchers 10,11,18,20 36 using a tight-binding ͑TB͒ method͔.…”

Section: A Young's Modulussupporting

confidence: 86%

“…In contrast, Liew et al 10 showed that Young's modulus of set 2 MWCNTs decreases as the wall number increases. Natsuki et al 11 used a structural mechanics model based on the universal force field ͑UFF͒ and their results confirm the observations of Liew et al 10 On the other hand, Kalamkarov et al 19 found that Young's modulus increases with increasing wall numbers from the results obtained using the finite element ͑FE͒ model coupled with UFF.…”

Section: Introductionsupporting

confidence: 58%

“…For a given inner diameter, the outer diameter of MWCNTs is increased with respect to the wall number. It is concluded by numerous studies 7,11,15,18,20,35 that Young's modulus is inversely dependent on the outer diameter of SWCNT, i.e., a larger outer diameter leads to a lower Young's modulus. For example, Young's modulus of the ͑20,20͒ SWCNT as shown in Table III is 0.9937 TPa, which is smaller than the 1.2853 TPa of the ͑5,5͒ SWCNT with a smaller diameter in Table IV.…”

Section: A Young's Modulusmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] It has been reported 12 that a mere 1 wt % of CNTs embedded into a polystyrene matrix would lead to significant increases in the overall elastic modulus and strength by approximately 35%-42% and 25%, respectively. In view of such potential applications, there is a strong motivation to understand their structural properties.…”

Section: Introductionmentioning

confidence: 99%

“…Investigations on MWCNTs normally maintain a constant outer diameter and inner tubes are progressively added to form the MWCNTs 14,17,18 or maintain a constant inner diameter and outer tubes are progressively added to construct the MWCNTs. 6,10,11,[18][19][20] For the sake of brevity, we shall refer to the former category as set 1 MWCNTs and the latter category as set 2 MWCNTs. Garg and Sinnott 14 ran MD simulations using the reactive empirical bond order ͑REBO͒ potential 21 coupled with a long-range Lennar-Jones ͑LJ͒ 22 potential to investigate the indentation of various surfaces by SWCNT and double-walled CNTs ͑DWCNTs͒.…”

Section: Introductionmentioning

confidence: 99%

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Examining the effects of wall numbers on buckling behavior and mechanical properties of multiwalled carbon nanotubes via molecular dynamics simulations

Zhang

Wang

Tan

2008

Journal of Applied Physics

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Molecular dynamics simulations are performed on multiwalled carbon nanotubes ͑MWCNTs͒ under axial compression to investigate the effects of the number of walls and their van der Waals ͑vdW͒ interaction on the buckling behaviors and mechanical properties ͑Young's modulus and Poisson's ratio͒. The Brenner second-generation reactive empirical bond order and Lennard-Jones 12-6 potential have been adopted to describe the short-range bonding and long-range vdW atomic interaction within the carbon nanotubes, respectively. In the presence of vdW interaction, the buckling strain and Young's modulus of MWCNTs increase as the number of tubes is increased while keeping the outermost tube diameter constant, whereas Poisson's ratio was observed to decrease. On the other hand, when the MWCNTs are formed by progressively adding outer tubes while keeping the innermost tube diameter constant, Young's modulus and buckling strain were observed to decrease, whereas Poisson's ratio increases. The buckling load increases with increasing the number of walls due to the larger cross-sectional areas. Individual tubes of MWCNTs with a relatively large difference between the diameters of the inner and outer tubes buckle one at a time as opposed to simultaneously for MWCNTs with a relatively small difference in diameters.

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