شبیه سازی دینامیک مولکولی ارتعاشات آزاد نانومیله های آلومینیومی با در نظر گرفتن تاثیر دما

This paper investigates the free vibrations of aluminum nanorods using molecular dynamics simulation. To this end, nanorods with a constant cross-section (12.15 × 12.15 nm²) and varying lengths (8.1, 10.1, and 12.15 nm) were considered. For each specific length, simulation temperatures were set to 0, 273, 300, 325, and 350 Kelvin, respectively. For each given length and temperature, a forced displacement was applied to the end of the nanorod. After releasing the nanorod's end, its position was recorded at different time intervals. Finally, the natural frequencies of the nanorod were extracted and reported by performing Fast Fourier Transform (FFT) operations. The described procedure was implemented using the fixed-free boundary condition, which is highly prevalent in nanotechnology applications. Given that aluminum, as a metallic material, possesses distinct mechanical properties that are crucial for designing and fabricating electronic devices, MEMS (Micro-Electro-Mechanical Systems), and NEMS (Nano-Electro-Mechanical Systems), the results of this study can serve as a valuable reference in this field.