Spatially nonlocal instability modeling of torsionaly loaded nanobeams

Ma, Xin; Kiani, Keivan

doi:10.1016/j.enganabound.2023.05.012

Cited by 4 publications

(2 citation statements)

References 99 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is worth noting that despite extensive applications of the SET and NSGET for studying the buckling and vibrations of microscale/nanoscale structures with flexural behavior in recent years, as evidenced by studies such as those given in Refs. [79][80][81], these advanced theories of continuum mechanics have rarely been adopted for mechanical analyses of SWCNTs. One possible explanation for this is that the surface effect is only significant in nanostructures consisting of multiple layers of atoms across their thickness, while SWCNTs are made by wrapping a single-layered graphene sheet, which makes the consideration of surface parameters somewhat irrational.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response of an Elastic Tube-like Nanostructure Embedded in a Vibrating Medium and under the Action of Moving Nano-Objects

Ma,

Roshan,

Kiani

et al. 2023

Symmetry

Self Cite

View full text Add to dashboard Cite

In recent years, researchers have looked at how tube-like nanostructures respond to moving loads and masses. However, no one has explored the scenario of a nanostructure embedded in a vibrating medium used for moving nano-objects. In this study, the governing equations of the problem are methodically derived using the nonlocal elasticity of Eringen as well as the Rayleigh and Reddy–Bickford beam theories. Analytical and numerical solutions are developed for capturing the nonlocal dynamic deflection of the nanostructure based on the moving nanoforce approach (excluding the inertia effect) and the moving nanomass approach (including the inertia effect), respectively. The results predicted by the established models are successfully verified with those of other researchers in some special cases. The results reveal that for low velocities of the moving nano-object in the absence of the medium excitation, the midspan deflection of the simply supported nanotube exhibits an almost symmetric time-history curve; however, by increasing the nano-object velocity or the medium excitation amplitude, such symmetry is violated, mainly due to the lateral inertia of the moving nano-object, as displayed by the corresponding three-dimensional plots. The study addresses the effects of the mass and velocity of the moving nano-object, amplitude, and frequency of the medium excitation, and the lateral and rotational stiffness of the nearby medium in contact with the nanostructure on the maximum dynamic deflection. The achieved results underscore the significance of considering both the inertial effect of the moving nano-object and the shear effect of stocky nanotubes embedded in vibrating media. This research can serve as a strong basis for conducting further investigations into the vibrational properties of more intricate tube-shaped nanosystems that are embedded in a vibrating medium, with the aim of delivering nano-objects.

show abstract

Section: Introductionmentioning

confidence: 99%

Dynamic Response of an Elastic Tube-like Nanostructure Embedded in a Vibrating Medium and under the Action of Moving Nano-Objects

Ma,

Roshan,

Kiani

et al. 2023

Symmetry

Self Cite

View full text Add to dashboard Cite

show abstract

“…MeshFree 2023 [14][15][16][17][18][19][20], etc. ), theoretical models are also only designed for isotropic materials.…”

Section: Introductionmentioning

confidence: 99%

Evaluating Pile-Supported Embankment Considering the Soil Anisotropy Effect

Zhuang,

Chen,

Wang

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

It is an economical way to use the pile-supported embankment for the construction of the embankment over soft soil. The combined use of piles and reinforcement effectively reduces the differential settlement of the embankment surface. However, the previous analysis of embankment stress and settlement did not take into account the anisotropy in the embankment filler. In this paper, the UMAT subroutine is developed by using the material subroutine interface in ABAQUS 2016 finite element software. The anisotropy of soil cohesion and friction angle has been incorporated into the Mohr–Coulomb yield criterion so that it can consider the anisotropy of soil. The accuracy of the anisotropic yield criterion in this paper is verified by an ABAQUS source program and related engineering examples. It is found that the anisotropy value of soil cohesion is inversely proportional to the stress ratio on the pile–soil interface while being directly proportional to the tensile stress applied to the geogrid. The results show that the anisotropy of the friction angle decreases with the soil arching effect but increases by 23.1% with the tensile stress on the geogrid. The position of the settlement plane remains relatively constant at 2.3 m as the friction angle anisotropy coefficient increases. These research results provide valuable theoretical guidance for on-site construction design.

show abstract

Nonlocal discrete and continuous modeling of free vibration of forests of vertically aligned single-/double-walled carbon nanotubes

Kiani,

Pakdaman

2024

Nanomechanics of Structures and Materials

View full text Add to dashboard Cite

Spatially nonlocal instability modeling of torsionaly loaded nanobeams

Cited by 4 publications

References 99 publications

Dynamic Response of an Elastic Tube-like Nanostructure Embedded in a Vibrating Medium and under the Action of Moving Nano-Objects

Dynamic Response of an Elastic Tube-like Nanostructure Embedded in a Vibrating Medium and under the Action of Moving Nano-Objects

Evaluating Pile-Supported Embankment Considering the Soil Anisotropy Effect

Nonlocal discrete and continuous modeling of free vibration of forests of vertically aligned single-/double-walled carbon nanotubes

Contact Info

Product

Resources

About