The effect of non-local higher order stress to predict the nonlinear vibration behavior of carbon nanotube conveying viscous nanoflow
作者： M. Mohammadimehr , A.A. Mohammadi-Dehabadi , Z. Khoddami Maraghi
DOI: 10.1016/J.PHYSB.2017.01.014
关键词: Natural frequency 、 Stiffness 、 Fluid dynamics 、 Stress (mechanics) 、 Microscale chemistry 、 Vibration 、 Mechanics 、 Instability 、 Classical mechanics 、 Physics 、 Surface stress
摘要: Abstract In this research, the effect of non-local higher order stress on nonlinear vibration behavior carbon nanotube conveying viscous nanoflow resting elastic foundation is investigated. Physical intuition reveals that increasing nanoscale leads to decrease stiffness nanostructure which firstly established by Eringen's elasticity theory (previous nonlocal method) while many papers have concluded otherwise at microscale based modified couple stress, strain gradient theories and surface effect. The model (new used in article has been studied few researchers other fields results from present study show trend new method size dependent including same. regard, motion equations are derived using a variational principal approach considering essential higher-order terms. surrounded medium modeled Pasternak increase stability system where fluid flow may cause instability. Effects various parameters such as parameter, coefficient, velocity dimensionless natural frequency research small scale parameter help approved theory, experiments, vice versa for previous method. This be useful measure accurately characteristics nanotubes design nanofluidic devices detecting blood Glucose.
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