Determination of thermal expansion coefficients for unidirectional fiber-reinforced composites
Determination of thermal expansion coefficients for unidirectional fiber-reinforced composites
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DOI：
10.1016/j.cja.2014.03.010
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发表时间：
2014-10
影响因子：
5.7
通讯作者：
Zhiguo Ran;Ying Yan;Jianfeng Li;Zhongxing Qi;Lei Yang
中科院分区：
文献类型：
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作者：
Zhiguo Ran;Ying Yan;Jianfeng Li;Zhongxing Qi;Lei Yang
在目前的工作中，单向（UD）纤维增强复合材料的热膨胀系数（CTE）的研究。首先，试图提出一个模型来预测UD复合材料的纵向和横向热膨胀系数的热弹性力学分析。该模型假设为一个同心圆柱体，横观各向同性纤维嵌入在各向同性基体中，并受到均匀的温度变化。然后给出了各热膨胀系数的简明公式。最后，用有限元程序MSC. Patran根据不同的材料系统和纤维体积分数。此外，给出了现有的实验数据和热膨胀系数的其他解析解的结果。将圆柱体模型、有限元法、实验结果和其他方法的计算结果进行了比较，结果表明，新模型预测的热膨胀系数与实验数据吻合较好。特别是，横向CTE通常提供比大多数其他解决方案所预测的更好的协议。
In the present work, the coefficients of thermal expansion (CTEs) of unidirectional (UD) fiber-reinforced composites are studied. First, an attempt is made to propose a model to predict both longitudinal and transverse CTEs of UD composites by means of thermo-elastic mechanics analysis. The proposed model is supposed to be a concentric cylinder with a transversely isotropic fiber embedded in an isotropic matrix, and it is subjected to a uniform temperature change. Then a concise and explicit formula is offered for each CTE. Finally, some finite element (FE) models are created by a finite element program MSC. Patran according to different material systems and fiber volume fractions. In addition, the available experimental data and results of other analytical solutions of CTEs are presented. Comparisons are made among the results of the cylinder model, the finite element method (FEM), experiments, and other solutions, which show that the predicted CTEs by the new model are in good agreement with the experimental data. In particular, transverse CTEs generally offer better agreements than those predicted by most of other solutions.