About the thermomechanical behaviour of a carbon fibre reinforced high-temperature thermoplastic composite

Results show that the thermal degradation of such composite material occurs at temperature higher than 400 °C. The glass transition temperature is approximately 250 °C. The tensile strength is higher than 1200 MPa in the fibre direction on a temperature range varying from −50 to 250 °C. The material has also an outstanding fatigue strength under tension in this material direction. At 200 °C, the fatigue strength for a high number of cycles (2·106) is still approximately 50% of the static strength. One of the weak point of this composite laminate is the relatively low interlaminar shear strength at high temperature.