Relationship between local buckling and atomic elastic stiffness in multi-walled carbon nanotubes under compression and bending deformations

Nishimura, Masaomi; Takahashi, Naoki; Takagi, Yu

doi:10.1016/j.commatsci.2016.12.044

Cited by 13 publications

(7 citation statements)

References 24 publications

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“…This method yields a relatively compact arrangement of CNTs in the bundle with minimal space variance between CNTs. The initial inter-tubular distance of 3.4 Å was considered, which is the same as the graphitic interlayer spacing distance [ 22 , 42 ]. Figure 1 e–f shows atomic configurations of a representative CNT bundle composed of a total of 19 nanotubes with indices (5,5), (7,7), (8,0) and (9,0).…”

Section: Methodsmentioning

confidence: 99%

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Torsional Properties of Bundles with Randomly Packed Carbon Nanotubes

et al. 2022

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Carbon nanotube (CNT) bundles/fibers possess promising applications in broad fields, such as artificial muscles and flexible electronics, due to their excellent mechanical properties. The as-prepared CNT bundles contain complex structural features (e.g., different alignments and components), which makes it challenging to predict their mechanical performance. Through in silico studies, this work assessed the torsional performance of CNT bundles with randomly packed CNTs. It is found that CNT bundles with varying constituent CNTs in terms of chirality and diameter exhibit remarkably different torsional properties. Specifically, CNT bundles consisting of CNTs with a relatively large diameter ratio possess lower gravimetric energy density and elastic limit than their counterpart with a small diameter ratio. More importantly, CNT bundles with the same constituent CNTs but different packing morphologies can yield strong variation in their torsional properties, e.g., up to 30%, 16% and 19% difference in terms of gravimetric energy density, elastic limit and elastic constants, respectively. In addition, the separate fracture of the inner and outer walls of double-walled CNTs is found to suppress the gravimetric energy density and elastic limit of their corresponding bundles. These findings partially explain why the experimentally measured mechanical properties of CNT bundles vary from each other, which could benefit the design and fabrication of high-performance CNT bundles.

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Section: Methodsmentioning

confidence: 99%

“…As a result, the experimentally measured elastic properties of CNT bundles are usually not consistent and show a relatively large variation. For example, their Young’s modulus ranges from 70 to 350 GPa [ 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Torsional Properties of Bundles with Randomly Packed Carbon Nanotubes

et al. 2022

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“…They found that the C-S bundle have lower critical strain and buckling load compared to the C-C bundle. Nishimura et al [187] investigated the local buckling of defective and non-defective five-walled CNTs under compression and bending load, using MDS with AIREBO potential. In general, it has been observed that temperature, diameter, length, and chirality of nanotubes affect Young's modulus, strain, and buckling mode of the nanotubes.…”

Section: Molecular Dynamicsmentioning

confidence: 99%

Advances in modelling and analysis of nano structures: a review

Chandel

Wang

Talha

2020

Nanotechnology Reviews

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AbstractNanostructures are widely used in nano and micro-sized systems and devices such as biosensors, nano actuators, nano-probes, and nano-electro-mechanical systems. The complete understanding of the mechanical behavior of nanostructures is crucial for the design of nanodevices and systems. Therefore, the flexural, stability and vibration analysis of various nanostructures such as nanowires, nanotubes, nanobeams, nanoplates, graphene sheets and nanoshells has received a great attention in recent years. The focus has been made, to present the structural analysis of nanostructures under thermo-magneto-electro-mechanical loadings under various boundary and environmental conditions. This paper also provides an overview of analytical modeling methods, fabrication procedures, key challenges and future scopes of development in the direction of analysis of such structures, which will be helpful for appropriate design and analysis of nanodevices for the application in the various fields of nanotechnology.

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“…journal.ump.edu.my/jmes ◄ and deformation-induced crystallographic structures. Crystal-based FEM is a versatile continuum mechanics approach, which can be used for solving both elastic-plastic and purely elastic problems of multi-body systems and complex CNTs (> 1.0 x 10 5 atoms) model structures [4,[17][18][19][20][21]. In 2008, Yao et al [22] explored the buckling response of CNTs with different layers by applying a modified FEM.…”

Section: Introductionmentioning

confidence: 99%

Effects of geometric variations on buckling properties of carbon nanostructures: A finite element analysis

Golesorkhie¹,

Navi²

2020

JMES

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Critical Bucking Load (CBL) is one of the essential parameters to describe the mechanic stabilities of materials, e.g. the low-dimensional carbon nanostructures. While the CBL of pristine carbon nanotubes have been previously investigated using the quantum mechanics-based calculations, the effect of geometrical variation on the CBL of carbon nanomaterials is rarely reported since it need considerably large atomic models, which needs high computational cost. In this study, both the analytical and Finite Element (FE) methods were employed to systematically explore the impact of atomic vacancies, shapes and heterostructures on the CBLs of carbon nanomaterials with the acceptable computational cost. Our studies on the pristine CNTs first demonstrate the validity of the method we used. After that, the systems with mono-/bi-/tri-/pinole-vacancies either on nanocones, nanotube, linearly-joined nanotubes or angle-adjoined were simulated and analyzed. Our results reveal that the CBL values decrease with the increase of the aspect ratio of all considered nanomaterials. Based on the obtained results, the CBL of nanocone with the aspect ratio of 1, reduces significantly, from 50 nN to 10 nN when the aspect ratio is 3. The CBL of homogeneous, capped, and joint CNTs reduces to below 2 nN when the aspect ratio is above 14. The introduction of geometric variations can greatly affect the CBL values. The larger atomic vacancy has more serious impact on the CBLs. The most highlighted impact is for the pinhole vacancy where the CBL reduces to up to 70% of the original value. Our studies on linearly-joint and angle-joint carbon hybrids further demonstrate that the CBL can also be affected by the boundary conditions and joint structures of the hybrids.

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Relationship between local buckling and atomic elastic stiffness in multi-walled carbon nanotubes under compression and bending deformations

Cited by 13 publications

References 24 publications

Torsional Properties of Bundles with Randomly Packed Carbon Nanotubes

Torsional Properties of Bundles with Randomly Packed Carbon Nanotubes

Advances in modelling and analysis of nano structures: a review

Effects of geometric variations on buckling properties of carbon nanostructures: A finite element analysis

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