A numerical study on the coefficients of thermal expansion of fiber reinforced composite materials
A numerical study on the coefficients of thermal expansion of fiber reinforced composite materials
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DOI：
10.1016/j.compstruct.2005.11.034
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发表时间：
2007-03-01
影响因子：
6.3
通讯作者：
Kumlutas, Dilek
中科院分区：
文献类型：
--
作者：
Karadeniz, Z. Haktan;Kumlutas, Dilek
本文采用有限元方法对纤维增强复合材料的有效热膨胀系数进行了细观力学建模研究。利用有限元软件ANSYS建立了具有代表性的单元胞模型，即不同纤维体积分数的圆柱体嵌入单位尺寸的立方体中。对不同类型复合材料的各种有限元解的结果与各种分析方法的结果以及现有的实验结果进行了比较。同时，用数值方法确定了不同材料体系的膨胀特性与纤维含量的关系。所有的模型和有限元分析都与纵向CTE的实验数据吻合得很好，而横向CTE的Rosen-Hashin和有限元结果通常比其他方法与实验数据吻合得更好。(c) 2005年Elsevier Ltd出版
In the present work, the effective coefficients of thermal expansion (CTE) of fiber reinforced composites are studied by micromechanical modeling using the finite element method. Representative unit cell models, cylinders which are embedded in cubes with unit dimensions, having different fiber volume fractions were produced using the finite element program ANSYS. Results of various finite element solutions for different types of composites were compared with the results of various analytical methods and with the available experimental results. Also, the expansion behavior of different material systems with respect to fiber content was determined numerically. All of the models and finite element analyses are in good agreement with the experimental data for longitudinal CTEs, however Rosen-Hashin and finite element results for transverse CTE Lire generally in much better agreement with the experimental data than the other methods for all materials investigated. (c) 2005 Published by Elsevier Ltd.