buckling – TechConnect Briefs

Mapping nanomechanical phenomena of graphene nanostructures using force modulation and ultrasonic force microscopy

Kolosov O.V., Kay N.D., Robinson B.J., Rosamond M., Zeze D., Dinelli F., Lancaster University, UK

Whereas graphene electronic properties are extensively studied, mechanical properties of graphene nanostructures are much less experimentally explored even for simple graphene structures. We use a combination of force sensitive scanning probe microscopies that combines low [...]

Determination of Non-local Elasticity Constants for the Torsional Buckling of Single-Wall Carbon Nanotubes Using Molecular Dynamics

Khademolhosseini F., Rajapakse R.K.N.D., Nojeh A., University of British Columbia, CA

Recently, devices have been developed which use Carbon Nanotubes (CNTs) as torsional spring elements. In order to define the range of applicability of CNTs in such devices, it is important to fully understand their torsional [...]

Modeling and Dynamics of Coupled Dome-shaped Micromechanical Oscillators

Sahai T., Zehnder A.T., Cornell University, US

In this work we analyze a feasible approach for constructing coupled micromechanical oscillators that synchronize. For this purpose we use dome shaped micro-oscillators that have previously been used to build radios. These oscillators are fabricated [...]

Modeling and Simulation of Multi-walled Carbon Nanotubes using Molecular Dynamics Simulation

Wong C.H., Liew K.M., He X.Q., Tan M.J., Meguid S.A., Nanyang Technological University, SG

Molecular dynamics simulation is performed on the buckling behavior of single and multi-walled carbon nanotubes under axial compression. Brenners second generation empirical potential is used to describe the many-body short range interatomic interactions for single-walled [...]

Electromechanical Buckling of a Pre-Stressed Layer Bonded to an Elastic Foundation

Abu-Salih S., Elata D., Technion – Israel Institute of Technology, IL

The electromechanical buckling of a pre-stressed layer bonded to an elastic foundation is analyzed. A new analytic solution of the mechanical post-buckling is presented. In addition, it is shown that electrostatic forces can precipitately instigate [...]

Snap-Through Bilayer Microbeam

Cabal A., Ross D.S., Eastman Kodak Company, US

In this paper, we describe our theoretical investigations of snap-through bilayer microbeams. We use a mathematical model that we devised to investigate the nonmonotone dependence of the vibrational frequency of such beams on temperature. The [...]

Modeling and Simulation of a Stiffness-Controlled Micro-Bridge Resonator

Verjus F., Bourouina T., Belhaire E., Mauduit N., Bosseboeuf A., IEF-CNRS, FR

This paper deals with the modelin and simulation of electrical stiffness control of a micro-bridge. Stiffness variations are obtained by compressive stresses that result from Joule heating. The micro-bridge is slaved to resonance in order [...]