STABILITY CHARACTERISTICS OF SINGLE-LAYERED ZINC OXIDE NANOSHEETS UNDER UNIAXIAL LOADING

来源 :Acta Mechanica Solida Sinica | 被引量 : 0次 | 上传用户:zhurx180
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
This paper is aimed to propose a three-dimensional model which would be used for investigation on the mechanical behavior of single-layered zinc oxide nanosheets. To develop this model, molecular mechanics is coupled with the density functional theory. Simulating the hexagonal lattices of nanosheets as a hexagonal mechanical structure composed of structural beam elements, the buckling behavior of zinc oxide nanosheets is studied. Effects of different parameters on the stability of armchair and zigzag nanosheets are examined. It is shown that the buckling forces of zigzag nanosheets are slightly greater than those of armchair ones. However, with increasing size of nanosheets the effect of atomic structure on the stability of nanosheets diminishes.By studying the effect of end conditions on the buckling behavior of nanosheets, it is shown the stability of nanosheets is affected significantly by boundary conditions. This paper is aimed to propose a three-dimensional model which would be used for investigation on the mechanical behavior of single-layered zinc oxide nanosheets. To develop this model, molecular mechanics is coupled with the density functional theory. Simulating the hexagonal lattices of nanosheets as a hexagonal mechanical structure composed of structural beam elements, the buckling behavior of zinc oxide nanosheets is studied. Effects of different parameters on the stability of armchair and zigzag nanosheets are examined. It is shown that the buckling forces of zigzag nanosheets are slightly greater than those of armchair ones. However, with increasing size of nanosheets the effect of atomic structure on the stability of nanosheets diminishes. By studying the effect of end conditions on the buckling behavior of nanosheets, it is shown the stability of nanosheets is affected significantly by boundary conditions.
其他文献
Tsinling, the backbone of China, stretches in a W-E direction through the heart of China and froms a geographical divide of first order. The name, having its or
由中国科学院大连化学物理研究所与中国石油石油化工研究院大庆化工研究中心合作开发的具有自主知识产权的高档润滑油基础油加氢异构脱蜡催化剂(PIC 802)及成套技术在中国石
目的 :探讨经腹横直小切口剔除子宫颈内层全切术的临床价值。方法 :本文选择我院 1998年 1月~ 1999年 1月经腹横直小切口剔除子宫颈内层全切术 40例作为研究组 ,对照组 40例为
近年来,异位妊娠的发病率呈现逐年升高的趋势[1]。由于诊疗水平的不断提高,异位妊娠的早期诊断成为可能,从而使药物保守治疗日益得到重视。1997年1月始,我们观察了米非司酮、
产后出血是产科严重的并发症之一,是导致产妇死亡的首要原因,为预防和减少产后出血、保障产妇的身体健康,我院近几年来,采用口服米索前列醇(简称米索),预防产后出血,效果优
人体平时正常月经28±2天,过期妊娠发生率约25%~16%。1976年FIGO规定,从末次月经第一天起达到或超过42周(≥294天)未临产的孕妇属高危妊娠[1],在此期分娩时称过期产,其新生儿称为
By the end of 2010, China has completed 85,000 kilometers of oil and gas pipelines in length, of which natural gas pipelines were 45,000 kilometers, crude oil p
过期流产属流产的特殊类型 ,在临床处理上较为复杂 ,传统上多采用口服大剂量乙烯雌酚后行钳刮术 ,由于药物的副作用和反复清宫 ,给患者带来了一定的痛苦。 1996年以来我们采
新法下腹部横切口子宫下段剖宫产术,医院已广泛开展,我们最近开展了20余例并加以改良,此新法具有手术时间短、损伤小、术中出血少,术后疼痛轻,缩短拆线时间等优点,取得了良好的效果,现
剖宫产在处理难产,某些孕期合并症及并发症方面有保证母婴安全的作用。我院产科将改良式子宫下段剖宫产术应用于90例具有手术指征的孕妇,取得了良好的效果,现报道如下。1 临