Ａｌ／ＣＦＲＰ多層積層ハイブリッド複合材料の熱膨張特性

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  • Thermal expansion behavior of Al/CFRP multi-layered hybrid composite materials.
  • Al CFRP タソウ セキソウ ハイブリッド フクゴウ ザイリョウ ノ ネツ

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The thermal expansion behavior of the hybrid materials built up from many thin Al (aluminum IN30) sheets and unidirectional CFRP prepreg layers (fiber volume content 60%) was investigated theoretically and experimentally. The linear thermal expansion coefficients in three mutual directions, parallel to fibers (αXH), perpendicular to fibers and parallel to laminate (αYH), perpendicular to laminates (αZH), were derived from analyzing the two-layer structural model. These anisotropic linear thermal expansion coefficients were measured by the interferometric technique from room-temperature to 150°C. αXH and αYH had little temperature dependent behavior and their values were almost constant. The value of αZH was also almost constant between room-temperature and 80°C, but at higher temperatures than 80°C they increased remarkably with increasing temperature. The constant values of αXH, αYH, αZH were about 7×10-61/°C, 28×10-61/°C, 34×10-61/°C, respectively. The average value of αXH was less than 30% that of monolithic aluminum. The estimated values agreed well with the experimental ones. But in the case of a thickly layered hybrid material, it is necessary to consider a shearing deformation of adhesive layers for the analysis of thermal expansion behavior.

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  • 材料

    材料 36 (405), 624-629, 1987

    公益社団法人 日本材料学会

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