Mechanics of Advanced Materials and Structures · 2016 · 29 citations · 35 references
EngineeringMaterials ScienceMechanical EngineeringNanomaterialsNanotechnologyVibrationAcoustic Wave PropagationNanomechanical PropertiesNanomechanicsNanotubesWave PropagationWave Propagation In StructuresAcoustic Phase VelocityBoron Nitride NanotubesPhase Velocity EstimationSeismic Phase VelocityStrain GradientTimoshenko Beam ModelingTimoshenko Beam TheoryWave Propagation In Fluids
This work is concerned with the size-dependent wave propagation of coupled double-walled boron nitride nanotubes (DWBNNTs) conveying nanoflow-systems based on Timoshenko beam theory. The two DWBNNTs are coupled by an enclosing visco-Pasternak medium. The small-scale effects are captured applying different surface piezoelasticity theories, including stress gradient, strain gradient, and strain inertia gradient. An analytical method is proposed to obtain phase velocity, cut-off, and escape frequencies of the system. Three cases of in-phase wave propagation, out-of-phase wave propagation, and wave propagation with one DWBNNT fixed are considered. Results indicate that ignoring surface and small-scale effects lead to inaccurate results.
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Experiments and theory in strain gradient elasticity
D.C.C. Lam, Fujun Yang, A.C.M. Chong et al. · Journal of the Mechanics and Physics of Solids · 2003 · 3K citations