Department of Automotive Engineering, School of Transportation Science and Engineering, Beihang University, Beijing, 100191, China.
Advanced Vehicle Research Center, Beihang University, Beijing, 100191, China.
Sci Rep. 2016 Nov 28;6:37692. doi: 10.1038/srep37692.
Orderly arrayed granular crystals exhibit extraordinary capability to tune stress wave propagation. Granular system of higher dimension renders many more stress wave patterns, showing its great potential for physical and engineering applications. At nanoscale, one-dimensionally arranged buckyball (C) system has shown the ability to support solitary wave. In this paper, stress wave behaviors of two-dimensional buckyball (C) lattice are investigated based on square close packing and hexagonal close packing. We show that the square close packed system supports highly directional Nesterenko solitary waves along initially excited chains and hexagonal close packed system tends to distribute the impulse and dissipates impact exponentially. Results of numerical calculations based on a two-dimensional nonlinear spring model are in a good agreement with the results of molecular dynamics simulations. This work enhances the understanding of wave properties and allows manipulations of nanoscale lattice and novel design of shock mitigation and nanoscale energy harvesting devices.
有序排列的颗粒晶体表现出非凡的调节应力波传播的能力。高维的颗粒系统呈现出更多的应力波模式，显示出其在物理和工程应用方面的巨大潜力。在纳米尺度上，一维排列的富勒烯（C）系统已经显示出支持孤波的能力。在本文中，基于密排和六方密排研究了二维富勒烯（C）晶格的应力波行为。我们表明，密排系统沿初始激发链支持高度定向的 Nesterenko 孤波，而密排系统倾向于分散脉冲并呈指数方式耗散冲击。基于二维非线性弹簧模型的数值计算结果与分子动力学模拟结果吻合较好。这项工作增强了对波性质的理解，并允许对纳米级晶格进行操纵和设计新型的减震和纳米级能量收集装置。
