抄録
This paper is concerned with the temperature dependence of flexural fatigue strength of pitch/PAN hybrid unidirectional CFRP laminates. The hybrid laminates were constructed by replacing few compressive surface layers of the pitch-based CFRP composites by PAN-based layers. Three point bending fatigue tests for the hybrid laminates were carried out for a temperature range from -20°C to 120°C which is below the glass transition temperature, 143°C, of matrix resin. The flexural fatigue strength for the hybrid laminates is significantly higher than that for the pitch-based laminates at all the temperatures tested. These experimental results were compared with the predicted ones obtained from the mechanical properties of pitch and PAN based unidirectional CFRP laminates.
