Size-Dependent Vibration of Double-Bonded Carbon Nanotube Reinforced Composite Microtubes Conveying Fluid Under Longitudinal Magnetic Field

چکیده مقاله

In the present research, vibration and instability of visco-elastically coupled carbon nanotube reinforced composite (CNTRC) microtubes conveying fluid is investigated. Single-walled carbon nanotubes are arranged in a longitudinal direction inside poly methyl methacrylate matrix. The longitudinal magnetic field is applied on coupled system. The surrounding medium is simulated by visco-Pasternak model due to considerable damping and shearing effects. Based on Mori–Tanaka theory, the properties of composite microtubes are obtained. In order to achieve more accurate results, strain gradient theory is developed in Timoshenko beam model. The motion equations are derived utilizing Hamilton's principle and solved by means of differential quadrature method. Considering slip flow regime, the influences of various parameters such as magnetic intensity, elastic medium, Knudsen number, and volume fraction of CNTs on the vibration characteristics of coupled system are studied in details. Results demonstrated that the stability of coupled system can be significantly improved by applying magnetic field. The result of this study can be useful to control and improve the performance of micro-mechanical systems conveying fluid.