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Electric Field Effects on Buckling Analysis of Boron–Nitride Nanotubes Using Surface Elasticity Theory
International Journal of Structural Stability and Dynamics ( IF 3.6 ) Pub Date : 2020-08-16 , DOI: 10.1142/s0219455420501370
Hamid Zeighampour 1 , Yaghoub Tadi Beni 2, 3 , Yaser Kiani 2
Affiliation  

In this paper, the axial buckling of boron nitride nanotubes (BNNTs) is investigated by considering the effects of surface and electric field. To achieve this purpose, the surface elasticity theory is exploited and the results are compared with the molecular dynamic simulation in order to validate the accuracy of the applied theory. In the molecular dynamics simulation, the potential between boron and nitride atoms is considered as Tersoff type. The Timoshenko beam theory is adopted to model BNNT. Moreover, two types of zigzag and armchair BNNTs are considered. In this study, the effects of surface, electric field, length, and thickness of BNNT on the critical buckling load are investigated. According to the results, the critical load of zigzag BNNT depends on the electric field. However, the electric field would not affect the critical load of the armchair BNNT. It should be noted that the surface residual tension and surface Lamé’s constants of BNNT have considerable impact on the critical load of BNNT. For lower values of electric field and smaller dimensions of BNNT, the critical load would be more dependent on the surface effect regarding the results. Furthermore, as an efficient non-classical continuum mechanic approach, the surface elasticity theory can fill the potential gap between the classical continuum mechanic and molecular dynamics simulation.

中文翻译:

使用表面弹性理论对氮化硼纳米管屈曲分析的电场效应

在本文中,通过考虑表面和电场的影响,研究了氮化硼纳米管(BNNTs)的轴向屈曲。为了达到这个目的,利用表面弹性理论并将结果与​​分子动力学模拟进行比较,以验证应用理论的准确性。在分子动力学模拟中,硼和氮化物原子之间的电势被认为是 Tersoff 型。BNNT 模型采用 Timoshenko 梁理论。此外,考虑了两种类型的锯齿形和扶手椅式 BNNT。在这项研究中,研究了 BNNT 的表面、电场、长度和厚度对临界屈曲载荷的影响。根据结果​​,之字形BNNT的临界负载取决于电场。然而,电场不会影响扶手椅 BNNT 的临界负载。需要注意的是,BNNT的表面残余张力和表面拉梅常数对BNNT的临界载荷有相当大的影响。对于较低的电场值和较小的 BNNT 尺寸,临界载荷将更多地取决于与结果有关的表面效应。此外,作为一种有效的非经典连续介质力学方法,表面弹性理论可以填补经典连续介质力学和分子动力学模拟之间的潜在空白。临界载荷将更多地取决于结果的表面效应。此外,作为一种有效的非经典连续介质力学方法,表面弹性理论可以填补经典连续介质力学和分子动力学模拟之间的潜在空白。临界载荷将更多地取决于结果的表面效应。此外,作为一种有效的非经典连续介质力学方法,表面弹性理论可以填补经典连续介质力学和分子动力学模拟之间的潜在空白。
更新日期:2020-08-16
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