单壁碳纳米管分子结构力学的有限元分析

发布时间：2018-03-10 02:24

本文选题：碳纳米管　切入点：分子结构力学　出处：《燕山大学》2015年硕士论文　论文类型：学位论文

【摘要】：在21世纪这个第三次工业革命所开创的新纪元中,纳米科技和纳米材料已经成为了新材料技术的领航者。其中,异军突起的碳纳米管成为如今纳米科技与纳米材料中的佼佼者。碳纳米管表现出了异同寻常材料的力学、电学、光学、热学等性能,也正是因为这些个性鲜明的性质使其具有其他材料无法匹敌的应用价值。为了研究碳纳米管的基本力学性能,基于分子结构力学方法,本文在ANSYS有限元软件的平台上实现其有限元算法及模拟。首先,介绍了分子结构力学理论。然后,使用有限元软件ANSYS二次开发技术开发了相应的程序模块,其中,碳原子间的共价键用梁单元模拟。本文对单壁碳纳米管进行有限元模型的建立;利用建立的模型对单壁碳纳米管的弹性行为进行有限元分析,计算了单壁碳纳米管的弹性模量,并分析了弹性模量与结构参数(直径和手性角)的关系;利用建立的模型对单壁碳纳米管的振动特性进行有限元分析,计算了单壁碳纳米管的固有频率和振动模态,并分析了固有频率与结构参数(长度和直径)的关系,总结了单壁碳纳米管的四种振动模态。
[Abstract]:In 21th century, the third industrial revolution ushered in a new era, nanotechnology and nanomaterials have become the leader of new material technology. Carbon nanotubes (CNTs) have become the best in nanotechnology and nanomaterials. Carbon nanotubes exhibit the mechanical, electrical, optical, thermal and other properties of unusual materials. It is precisely because of these distinctive properties that they are of unparalleled application value to other materials. In order to study the basic mechanical properties of carbon nanotubes, based on molecular structural mechanics, In this paper, the finite element algorithm and simulation are realized on the platform of ANSYS finite element software. Firstly, the theory of molecular structure mechanics is introduced. Then, the corresponding program module is developed by using the second development technology of finite element software ANSYS. In this paper, the finite element model of single-walled carbon nanotubes is established, the elastic behavior of single-walled carbon nanotubes is analyzed by finite element method, and the elastic modulus of single-walled carbon nanotubes is calculated. The relationship between elastic modulus and structural parameters (diameter and chiral angle) was analyzed, the vibration characteristics of single-walled carbon nanotubes were analyzed by finite element method, and the natural frequencies and vibration modes of single-walled carbon nanotubes were calculated. The relationship between natural frequency and structural parameters (length and diameter) is analyzed and four vibration modes of single-walled carbon nanotubes are summarized.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.1;O613.71

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