Al/CFRP積層ハイブリッド材料の力学的性質の温度依存性

概要

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Temperature dependence of mechanical properties of the hybrid material built up from many thin aluminum alloy sheets (A 5086) and unidirectional CFRP prepreg layers was investigated within the range from room temperature to 150°C. Tensile elastic moduli and failure strength of the hybrid material were stable regarding temperature changes from room temperature to 150°C. On the other hand, bending properties had a temperature dependence. Bending elastic modulus in the direction paralled to the fibers was stable from room temperature to 110°C. However, it decreased suddenly above this temperature. It is thought this is because the buckling of the carbon fibers in the compressive side of the specimen was produced by the lack of supporting force from the softened matrix. The thermal stability of bending strength in the direction of fibers was restricted within the range from room temperature to 80°C. Bending strength decreased rapidly above 80°C because of the compressive buckling failure of the CFRP layers in the compressive side of the specimen. Bending failure strain and plastic deformation perpendicular to the fibers increased as the temperature increased. This means that if the V-bending process is carried out in the high temperature range, the limit of work will be enlarged more than the process at room temperature.
日本複合材料学会の論文