三维五向编织复合材料导热性能的有限元分析

李典森; 卢子兴; 刘振国; 李仲平

三维五向编织复合材料导热性能的有限元分析

1.
北京航空航天大学航空科学与工程学院, 北京 100191
2.
航天材料工艺研究所, 北京 100076

基金项目: 航空科学基金(04B51045);北京市教育委员会共建项目建设计划(XK100060522);北航博士创新基金

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出版历程
- 收稿日期: 2007-07-24
- 修回日期: 2007-12-26
- 刊出日期: 2008-08-28

Finite element analysis of thermal conductivity of three dimensional and five directional braided composites

1.
School of Aeronautics Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
2.
Institute of Space Material Technology, Beijing 100076, China

摘要

摘要: 根据三维五向编织复合材料的细观结构模型,分别假设编织纱线和轴纱具有六边形和正方形横截面,建立了计算三维五向编织复合材料导热性能的有限元模型.采用有限元方法,设定合理的边界条件,计算了三维五向编织复合材料的横向和纵向热传导系数,并与三维四向编织复合材料的热传导系数进行了比较,分析了编织角和纤维体积含量对热传导系数的影响规律.此外,还确定了材料内部的温度、热梯度及热流量的分布,为材料热力耦合问题的分析奠定了基础.
- 三维五向编织 /
- 编织复合材料 /
- 导热性能 /
- 有限元 /
- 单胞
Abstract: The finite element model for thermal conductivity was established based on the micro-structure of 3-D & 5-Dbraided composites and the assumption of the braiding yarn with the hexagon section and the axial yarn with the square section.The transverse and longitudinal thermal conductivity coefficients of 3-D & 5-Dbraided composites were calculated by the finite element method and compared with the corresponding results of 3-D & 4-Dbraided composites.The influences of the braiding angle and fiber volume fraction on the thermal conductivity coefficient were also analyzed.In addition,the distributions of the temperature,the thermal gradient and thermal flux of composites were determined,providing a basis for the analysis of the coupling problem of thermo-mechanics.
- 3-D and 5-D braiding /
- composite /
- thermal conductivity /
- FEM /
- unit cell

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参考文献(12)

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