Atomistic Study for the Vibrational Properties on Σ5 Symmetric Tilt Bicrystal Copper Nanowires

Abstract:

In this study, an atomistic simulation was performed to investigate intrinsic resonance propensity of clamped-clamped copper nanowires with Σ5 (310)/[001] symmetric tilt grain boundary. Grain boundary energy γ_GB for bicrystal structure was calculated based on an iterative approach. The stable atomic configuration was then doubly clamped and excited via flexural oscillation under varied temperatures. From the result, the appearance of grain boundary significantly alters the resonance properties of Cu nanowires. Greater attenuation in kinetic energy can be observed with increased temperature. Quality factors attains Q ~ 1/T^0.7144 and 1/T^0.7249 with temperatures from kinetic energy and centroid root mean square spectrum, respectively, where the former seems more reliable to employ at elevated temperatures.

• Periodical: Applied Mechanics and Materials (Volume 846)
• Pages: 193-198
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.846.193
• Online since: July 2016
• Authors: Bo Bin Xing, Shao Hua Yan, Wu Gui Jiang, Qing Hua Qin*
• Keywords: Computational Molecular Dynamics, Grain Boundary Energy, Nanowire

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