短碳纤维增强树脂基复合材料的弹性性能研究.doc
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短碳纤维增强树脂基复合材料的弹性性能研究,1.89万字自己原创的毕业论文，已经通过校内系统检测，重复率低，仅在本站独家出售，大家放心下载使用摘要：汽车轻量化设计是降低汽车排放、提高燃油经济性的最有效措施之一。具有比强度大、比刚度大的碳纤维增强树脂基复合材料在汽车轻量化设计中得到了越来越广泛的应用。由于复合材料的应用越来越...
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短碳纤维增强树脂基复合材料的弹性性能研究
1.89万字
自己原创的毕业论文，已经通过校内系统检测，重复率低，仅在本站独家出售，大家放心下载使用
摘要：汽车轻量化设计是降低汽车排放、提高燃油经济性的最有效措施之一。具有比强度大、比刚度大的碳纤维增强树脂基复合材料在汽车轻量化设计中得到了越来越广泛的应用。由于复合材料的应用越来越广泛，对于复合材料的性能要求也越来越高，研究并设计高性能的新型先进复合材料具有重大意义。有限元细观力学研究复合材料是近年来固体力学研究的热点之一。复合材料的有限元细观力学研究宏观均匀但细观非均匀的介质。目的是建立材料细观结构特征和材料等效宏观性能间的定量关系，阐明复合材料的性能变化规律和破坏机制，从而给复合材料的优化设计提供指导。建立适当的代表性体积单元是细观力学分析的关键，对分析和理解微观结构和宏观性能的关系具有十分重要的意义。
对ABAQUS前处理进行二次开发，采用Python语言编写3DRandFiber程序代码，从而实现复合材料微观结构代表性体积单元的自动化建模。利用ABAQUS对代表性体积单元模型进行有限元分析，分别研究了纤维体积含量、纤维取向、界面弹性性能对复合材料宏观弹性性能的影响。碳纤维体积分数增加，短碳纤维增强树脂基复合材料的宏观杨氏模量增加。随着纤维与加载方向之间的夹角增大，该复合材料的宏观杨氏模量先降低后升高。界面和基体模量的比值对该复合材料的性能影响不显著。分析的结果期望给复合材料优化提供一些设计参数。
关键词： 短碳纤维增强树脂基复合材料 代表性体积单元 计算机仿真 有限元分析
STUDY ON THE ELASTIC PROPERTIES OF SHORT CARBON FIBER REINFORCED RESIN MATRIX COMPOSITES
Abstract：Automotive lightweight design is one of the most effective measures to improve Fuel Economy and reduce Vehicle Emission. Carbon fiber reinforced resin matrix composites have been widely applied in automotive lightweight design. With the increasingly widespread application of composite materials, the performance requirements of composite materials also become higher and higher, so it has an important significance in the design of high-performance new advanced composite materials. Research on composite materials by using finite element computation micromechanics become one of the hotspot in solid mechanics in recent years. The micromechanics of composite study the medium which are deemed as homogeneous in macroscopic level but inhomogeneous at microscopic level. The purpose of finite element computation micromechanics is to establish the quantitative relationship between the microstructure and the macroscopic effective properties of composite materials, and clarify the law and failure mechanism of composite materials, and then provide some useful guidance to the optimal design of composite materials. Establishing appropriate representative volume element to simulate and analyze the microstructure of composites and to understand the relationship between the microstructure and the macroscopic properties has the very significance.
After secondary development of the pre-treatment of the ABAQUS, the special program code which is used to achieve the automatic generation of the representative volume element of composite microstructure for 3DRandFiber is developed by Python language. In this paper, we seek to carry out direct micromechanical analysis of volume fraction of carbon fiber, particulate-to-matrix modulus ratio, carbon fiber orientation on the elastic properties of short carbon reinforced resin matrix composites. The stiffness of the composites increases with increasing particle volume fraction. As the angle between loading direction and fiber axes increases, the stiffness of the composites decreases first and then increases. Since the size of fillers is in the scale of micrometers, the influence of particulate-to-matrix modulus ratio is inconspicuous. The results of the investigation are expected to provide some design parameters for the microstructural optimization of the composites.
Key words： Short carbon reinforced resin matrix composites Representative Volume Element Computer simulation Finite element analysis
目录
第一章 绪论 1
1.1课题的研究背景 1
1.2复合材料 1
1.2.1复合材料概述 1
1.2.2 复合材料分类 2
1.2.3 复合材料的应用和发展 3
1.2.4 复合材料的构造和制备 4
1.3短碳纤维增强树脂复合材料 4
1.3.1短碳纤维增强树脂基复合材料概述 5
1.3.2 短碳纤维增强树脂基复合材料的基体 5
1.3.3 增强纤维 6
1.3.4 短碳纤维增强复合材料的界面 6
1.4 研究的意义及内容 7
第二章 复合材料力学分析基础 9
2.1 复合材料的力学分析方法 9
2.2 弹性力学基本方程 10
2.3 复合材料的有效性质及均质化方法 12
2.3.1 复合材料的有效性质 12
2.3.2 代表性体积单元 12
2.3.3 均质化方法 13
2.4 有限单元法 14
2.5 有限元计算细观力学 15
第三章 短碳纤维增强树脂基复合材料微结构仿真 17
3.1 引言 17
3.2 随机算法微结构仿真 17
3.3 基于体视学计算机重构技术的仿真 18
3.4 基于Voronoi图或Laguerre图的仿真 18
第四章 短碳纤维增强树脂基复合材料微结构的数值模拟 19
4.1 有限元模型建立 19
4.2 有限元计算模型结果分析 20
4.2.1 短碳纤维体积分数对复合材料弹性性能的影响 20
4.2.2 纤维取向对复合材料弹性性能的影响 27
4.2.3 纤维—基体界面的弹性性..
1.89万字
自己原创的毕业论文，已经通过校内系统检测，重复率低，仅在本站独家出售，大家放心下载使用
摘要：汽车轻量化设计是降低汽车排放、提高燃油经济性的最有效措施之一。具有比强度大、比刚度大的碳纤维增强树脂基复合材料在汽车轻量化设计中得到了越来越广泛的应用。由于复合材料的应用越来越广泛，对于复合材料的性能要求也越来越高，研究并设计高性能的新型先进复合材料具有重大意义。有限元细观力学研究复合材料是近年来固体力学研究的热点之一。复合材料的有限元细观力学研究宏观均匀但细观非均匀的介质。目的是建立材料细观结构特征和材料等效宏观性能间的定量关系，阐明复合材料的性能变化规律和破坏机制，从而给复合材料的优化设计提供指导。建立适当的代表性体积单元是细观力学分析的关键，对分析和理解微观结构和宏观性能的关系具有十分重要的意义。
对ABAQUS前处理进行二次开发，采用Python语言编写3DRandFiber程序代码，从而实现复合材料微观结构代表性体积单元的自动化建模。利用ABAQUS对代表性体积单元模型进行有限元分析，分别研究了纤维体积含量、纤维取向、界面弹性性能对复合材料宏观弹性性能的影响。碳纤维体积分数增加，短碳纤维增强树脂基复合材料的宏观杨氏模量增加。随着纤维与加载方向之间的夹角增大，该复合材料的宏观杨氏模量先降低后升高。界面和基体模量的比值对该复合材料的性能影响不显著。分析的结果期望给复合材料优化提供一些设计参数。
关键词： 短碳纤维增强树脂基复合材料 代表性体积单元 计算机仿真 有限元分析
STUDY ON THE ELASTIC PROPERTIES OF SHORT CARBON FIBER REINFORCED RESIN MATRIX COMPOSITES
Abstract：Automotive lightweight design is one of the most effective measures to improve Fuel Economy and reduce Vehicle Emission. Carbon fiber reinforced resin matrix composites have been widely applied in automotive lightweight design. With the increasingly widespread application of composite materials, the performance requirements of composite materials also become higher and higher, so it has an important significance in the design of high-performance new advanced composite materials. Research on composite materials by using finite element computation micromechanics become one of the hotspot in solid mechanics in recent years. The micromechanics of composite study the medium which are deemed as homogeneous in macroscopic level but inhomogeneous at microscopic level. The purpose of finite element computation micromechanics is to establish the quantitative relationship between the microstructure and the macroscopic effective properties of composite materials, and clarify the law and failure mechanism of composite materials, and then provide some useful guidance to the optimal design of composite materials. Establishing appropriate representative volume element to simulate and analyze the microstructure of composites and to understand the relationship between the microstructure and the macroscopic properties has the very significance.
After secondary development of the pre-treatment of the ABAQUS, the special program code which is used to achieve the automatic generation of the representative volume element of composite microstructure for 3DRandFiber is developed by Python language. In this paper, we seek to carry out direct micromechanical analysis of volume fraction of carbon fiber, particulate-to-matrix modulus ratio, carbon fiber orientation on the elastic properties of short carbon reinforced resin matrix composites. The stiffness of the composites increases with increasing particle volume fraction. As the angle between loading direction and fiber axes increases, the stiffness of the composites decreases first and then increases. Since the size of fillers is in the scale of micrometers, the influence of particulate-to-matrix modulus ratio is inconspicuous. The results of the investigation are expected to provide some design parameters for the microstructural optimization of the composites.
Key words： Short carbon reinforced resin matrix composites Representative Volume Element Computer simulation Finite element analysis
目录
第一章 绪论 1
1.1课题的研究背景 1
1.2复合材料 1
1.2.1复合材料概述 1
1.2.2 复合材料分类 2
1.2.3 复合材料的应用和发展 3
1.2.4 复合材料的构造和制备 4
1.3短碳纤维增强树脂复合材料 4
1.3.1短碳纤维增强树脂基复合材料概述 5
1.3.2 短碳纤维增强树脂基复合材料的基体 5
1.3.3 增强纤维 6
1.3.4 短碳纤维增强复合材料的界面 6
1.4 研究的意义及内容 7
第二章 复合材料力学分析基础 9
2.1 复合材料的力学分析方法 9
2.2 弹性力学基本方程 10
2.3 复合材料的有效性质及均质化方法 12
2.3.1 复合材料的有效性质 12
2.3.2 代表性体积单元 12
2.3.3 均质化方法 13
2.4 有限单元法 14
2.5 有限元计算细观力学 15
第三章 短碳纤维增强树脂基复合材料微结构仿真 17
3.1 引言 17
3.2 随机算法微结构仿真 17
3.3 基于体视学计算机重构技术的仿真 18
3.4 基于Voronoi图或Laguerre图的仿真 18
第四章 短碳纤维增强树脂基复合材料微结构的数值模拟 19
4.1 有限元模型建立 19
4.2 有限元计算模型结果分析 20
4.2.1 短碳纤维体积分数对复合材料弹性性能的影响 20
4.2.2 纤维取向对复合材料弹性性能的影响 27
4.2.3 纤维—基体界面的弹性性..
