Finite deformation of single-walled carbon nanocones under axial compression using a temperature-related multiscale quasi-continuum model

Wang, Xiangyang; Wang, Jinbao; Gao, Xu

doi:10.1016/j.commatsci.2015.12.033

Cited by 17 publications

(2 citation statements)

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“…Besides the applications, extensive efforts have also been devoted to investigate the thermal conductivity of the single-walled (or mono-layer) carbon nanocones [35] and their mechanical properties [36][37][38][39][40][41][42]. The studied nanocones either have an open end or closed end, and the tensile [43] and compressive behaviors (especially the buckling and post-buckling behaviors) [44][45][46][47] are the most extensively studied deformation scenarios. Most of these studies rely on atomistic simulations [43,46,48], while the multiscale quasi-continuum approach [45,49] and continuum spring-mass model [39] have also been adopted.…”

Section: Introductionmentioning

confidence: 99%

“…The studied nanocones either have an open end or closed end, and the tensile [43] and compressive behaviors (especially the buckling and post-buckling behaviors) [44][45][46][47] are the most extensively studied deformation scenarios. Most of these studies rely on atomistic simulations [43,46,48], while the multiscale quasi-continuum approach [45,49] and continuum spring-mass model [39] have also been adopted. Different geometrical parameters have been assessed, including the apex angle, the length, the top radius and the bottom radius.…”

Section: Introductionmentioning

confidence: 99%

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A novel super-elastic carbon nanofiber with cup-stacked carbon nanocones and a screw dislocation

Han

Duan

et al. 2019

Carbon

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Carbon nanofibers (NFs) have been envisioned with broad promising applications, such as nanoscale actuators and energy storage medium. This work reports for the first-time superelastic tensile characteristics of NFs constructed from a screw dislocation of carbon nanocones (NF-S). The NF-S exhibits three distinct elastic deformation stages under tensile, including an initial homogeneous deformation, delamination, and further stretch of covalent bonds. The delamination process endows the NF-S extraordinary tensile deformation capability, which is not accessible from its counterpart with a normal cup-stacked geometry. The failure of NF-S is governed by the inner edges of the nanocone due to the strain concentration, leading to a common failure force for NF-S with varying geometrical parameters. Strikingly, the delamination process is dominated by the inner radius and the apex angle of the nanocone. For a fixed apex angle, the yielding strain increases remarkably when the inner radius increases, which can exceed 1000%. It is also found that the screw dislocation allows the nanocones flattening and sliding during compression. This study provides a comprehensive understanding on the mechanical properties of NFs as constructed from carbon nanocones, which opens new avenues for novel applications, such as nanoscale actuators. (Haifei Zhan) 1 = ( /2) and 1 = ( /2), respectively. Considering the close packing morphology, i.e., the distance between each layer equals to the graphite distance (b = 3.35 Å), the effective height or length of the nanofiber can be approximated as ℎ 1 = ( − 1) /sin ( 2 ⁄ ). Thus, the cross-section and volume of the nanofiber can be approximated as 1 = ( = − = ) sin( 2 ⁄ ) = , and 1 = ( − 1)( = − = )sin ( 2 ⁄ ).

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