Related Experiment Video
Updated: Nov 19, 2025

Novel 3D/VR Interactive Environment for MD Simulations, Visualization and Analysis
Published on: December 18, 2014
Torsional buckling analysis of MWCNTs considering quantum effects of fine scaling based on DFT and molecular
M Mirnezhad1, R Ansari2, S R Falahatgar2
1Faculty of Mechanical Engineering, University Campus 2, University of Guilan, Rasht, Iran.
Abstract:
In this paper, quantum and molecular mechanics are used to study the quantum effects of fine scaling on the buckling strength of multi-walled carbon nanotubes (MWCNTs), as well as the effects of changes in length, diameter, chirality, wall number and length-to-diameter ratio of the structure under torsional loading. To this end, the total potential energy of the system is calculated with the consideration of both bond stretching and bond angular variations. The density functional theory (DFT) along with the generalized gradient approximation (GGA) function is used to obtain the relevant elastic constants of the nanotubes. The study shows that the quantum effects of fine scaling cause more buckling strength of the structure against external torsional loadings. Also, with any longitudinal change as well as the changes in the structural arrangement that reduce the quantum effects of fine scaling, the strength of the structure decreases sharply.
More Related Videos
Related Concept Videos
Torsion of Noncircular Members
Thin-Walled Hollow Shafts
Shear and Bending Moment Diagram: Problem Solving
Draw a Free-Body Diagram: Start by drawing a free-body diagram of the entire beam, including the concentrated loads, distributed load, and reaction...
Bending and Torsional Moments
The reaction developed in a structural element when subjected to an external force causes the element to bend. When a structural element bends upwards, it creates compressive normal forces on the top and tensile normal forces on the bottom, resulting in a couple that determines the bending...
Bending of Members Made of Several Materials
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...
Symmetric Member in Bending

