Carbon nanotubes (CNTs) have substantial promise as nanocontainers filled with fluid in their hollow cavity in nanotechnology. This paper reports the result of an investigation into the influence of internal fluid on the coupling vibration of fluid-filled CNTs. The coupling vibrational behaviour of fluid-filled CNTs under different supported ends, aspect ratio, surrounding elastic medium, mass density of the fluid and layer number is investigated. The results obtained describe the effect of end condition, aspect ratio, surrounding elastic medium, mass density of the fluid and layer number on the coupling natural frequencies. The new features of the coupling vibration of fluid-filled CNTs and some meaningful and interesting results in this paper are helpful for the application and design of nanostructures conveying fluid in which CNTs act as basic elements.
The NiCr micro-heater is a key element of MEMS-based electro-explosive device (mEED), while electrostatic discharge (ESD) may excite the micro-heater accidentally. To discover mechanism that how the ESD excitations effect on heat response performance of NiCr micro-heater, electro-thermal conversion process was numerically modelled by using commercial software. Three different shapes of micro-heaters, including rectangular, V-shape and square ones, are designed, and a series of simulation models are built under ESD events of 25kV, 5000Ω, 500pF and 25kV, 500Ω, 150pF. Heat response performance of NiCr micro-heater with different shapes and sizes were numerically computed under the said ESD events and compared with. The critical safety value at which LTNR and copper azide would not be ignited accidentally were calculated according to the fitted formulas. Conclusions are that maximum temperature decreases exponentially with increase of width of rectangular micro-heater, decreases exponentially with increase of wm and α of V-shape micro-heater, and decreases exponentially with increase of length or width of square micro-heater. The ESD event of 25kV, 500Ω, 150pF is a more severe case for micro-heater than ESD event of 25kV, 5000Ω, 500pF. These results could supply critical data to guide the design of MEMS -based EED for ESD protection.
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