Torsional failure of water-filled carbon nanotubes

Ye, Hongfei; Li, Rui; Zheng, Yonggang; Zhang, Zhongqiang; Zong, Zhi; Zhang, Hongwu

doi:10.1177/1056789515610397

Cited by 5 publications

(3 citation statements)

References 36 publications

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“…Buckling experiments on the miniaturized specimens are difficult to conduct since applying appropriately aligned uniform compression loads at the specimen's ends is challenging. The atomistic models (e.g., Shen and Chen, 2006;Ye et al, 2016;Zhang et al, 2017aZhang et al, , 2017b are computationally expensive and therefore, may not be used for design purposes. For these reasons, the engineering science community has always appreciated the analytical modeling of the buckling of micro-and nanosized pillars and beams.…”

Section: Introductionmentioning

confidence: 99%

Effects of multiple edge cracks, shear force, elastic foundation, and boundary conditions on bucking of small-scale pillars

Darban,

Luciano,

Basista

2023

International Journal of Damage Mechanics

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The buckling instability of micro- and nanopillars can be an issue when designing intelligent miniaturized devices and characterizing composite materials reinforced with small-scale beam-like particles. Analytical modeling of the buckling of miniaturized pillars is especially important due to the difficulties in conducting experiments. Here, a well-posed stress-driven nonlocal model is developed, which allows the calculation of the critical loads and buckling configurations of the miniaturized pillars on an elastic foundation and with arbitrary numbers of edge cracks. The discontinuities in bending slopes and deflection at the damaged cross-sections due to the edge cracks are captured through the incorporation of both rotational and translational springs. A comprehensive analysis is conducted to investigate the instability of pillars containing a range of one to four cracks. This analysis reveals interesting effects regarding the influence of crack location, nonlocality, and elastic foundation on the initial and subsequent critical loads and associated buckling configurations. The main findings are: (i) the shielding and amplification effects related to a system of cracks become more significant as the dimensions of pillars reduce, (ii) the influence of the shear force at the damaged cross-section related to the translational spring must not be neglected when dealing with higher modes of buckling and long cracks, (iii) an elastic foundation decreases the effects of the cracks and size dependency on the buckling loads, and (iv) the effects of the edge cracks on the critical loads and buckling configurations of the miniaturized pillars are highly dependent on the boundary conditions.

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Section: Introductionmentioning

confidence: 99%

Effects of multiple edge cracks, shear force, elastic foundation, and boundary conditions on bucking of small-scale pillars

Darban,

Luciano,

Basista

2023

International Journal of Damage Mechanics

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“…CNT is a kind of hollow structure, the mechanical properties of which can be, therefore, modified by encapsulating the metal particles [7][8][9][10], C60 [11][12][13], water [14,15,[16][17][18][19] and other gas molecules [12,20]. By employing molecular dynamics (MD) simulations, Guo et al [7] found that the strength of gold-filled CNT is significantly enhanced in comparison with hollow CNT.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of hollow and water-filled graphyne nanotube and carbon nanotube hybrid structure

Lei¹,

Zhang²,

Liu³

et al. 2018

Nanotechnology

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By performing molecular dynamics simulations, a GNT/CNT hybrid structure constructed via combing (6, 6) graphyne nanotube (GNT) with (6, 6) carbon nanotube (CNT) has been designed and investigated. The mechanical properties induced by the percentage of GNT, water content and electric field were examined. Calculation results reveal that the fracture strain and strength of hollow hybrid structure are remarkably smaller than that of perfect (6, 6) CNT. In addition, the Young's modulus decreases monotonously with the increase of percentage of GNT. More importantly, the tunable mechanical properties of hybrid structure can be achieved through filling with water molecules and applying an electric field along tensile direction. Specifically, increasing water content from 0.0 to 8.70 mmol g in the absence of electric field could result in fracture strain and strength reducing by 15.09% and 12.87%, respectively. Besides, enhancing fracture strain and strength of water-filled hybrid structure with water content of 8.70 mmol g can also be obtained with rising electric field intensity. These findings would provide a valuable theoretical basis for designing and fabricating a nanodevice with controllable mechanical performances.

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“…Carbon-based nano-materials such as carbon nanotube and graphene have been studied on its fracture behaviors and mechanical properties using MD simulation extensively. For carbon nanotubes, Ye et al (2016) investigated the torsional failure of water-filled carbon nanotube and compared its behaviors with empty carbon nanotubes.…”

Section: Introductionmentioning

confidence: 99%

The effects of vacancy defect on the fracture behaviors of zigzag graphene nanoribbons

Ragab

Basaran

2016

International Journal of Damage Mechanics

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Zigzag graphene nanoribbons with and without single vacancy defect are strained under uniaxial tension using molecular dynamics simulations. In order to understand the influence of vacancy defect on the damage mechanics, the graphene nanoribbons are categorized into six groups based on their width, ranging from 2.5 nm to 15 nm. In each group, the length of GRNGNR also varied from 2.5 nm to 15 nm. The comparison of the stress–strain relationship and the fracture behavior of pristine and defective graphene nanoribbon demonstrate that single vacancy defect has little influence on the elastic modulus and the ultimate strength of graphene nanoribbons. However, size effect does have an influence on the ultimate failure stress of the graphene nanoribbon.

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Torsional failure of water-filled carbon nanotubes

Cited by 5 publications

References 36 publications

Effects of multiple edge cracks, shear force, elastic foundation, and boundary conditions on bucking of small-scale pillars

Effects of multiple edge cracks, shear force, elastic foundation, and boundary conditions on bucking of small-scale pillars

Mechanical properties of hollow and water-filled graphyne nanotube and carbon nanotube hybrid structure

The effects of vacancy defect on the fracture behaviors of zigzag graphene nanoribbons

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