https://scholars.lib.ntu.edu.tw/handle/123456789/424948
標題: | Thermal Expansion Coefficients of Unidirectional Fiber?Reinforced Ceramics | 作者: | Hsueh C.?H. Becher P.F. CHUN-HWAY HSUEH |
公開日期: | 1988 | 卷: | 71 | 期: | 10 | 起(迄)頁: | C438-C441 | 來源出版物: | Journal of the American Ceramic Society | 摘要: | The influence of internal stresses, due to the thermomechanical mismatch between the fiber and the matrix, on the thermal expansion behavior of unidirectional fiber?reinforced ceramics is considered. Using the composite cylinder model, the effective thermal expansion coefficients of the composite are calculated from the total strains, which consist of the strains due to temperature changes and the strains induced by the presence of internal stresses. The results reveal that when the fiber and the matrix have the same elastic constants, the rule of mixtures approach can be used to obtain the thermal expansion coefficients of the composite, as observed in previous analytical solutions. Also, for the case of low volume fractions of fibers with Young's moduli much larger than those of matrices, and the thermal expansion coefficients lower than those of matrices, the transverse thermal expansion coefficient of the composite is higher than that of either the fiber or the matrix. However, unlike previous studies, the present analysis provides a physical basis for this phenomenon in terms of the internal thermal stress state within the composite. Copyright ? 1988, Wiley Blackwell. All rights reserved |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/424948 | ISSN: | 00027820 | DOI: | 10.1111/j.1151-2916.1988.tb07521.x |
顯示於: | 材料科學與工程學系 |
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