Anti-high speed impact properties of carbon fiber/bismaleimide resin composites

Abstract

The carbon fiber/bismaleimide resin composites were prepared by the autoclave molding process. Effects of carbon fiber type and volume fraction of carbon fiber on the high speed impact properties were investigated by air cannon impact testing machine, ultrasonic C-scanner and electronic universal material testing machine. The results demonstrate that the anti-high speed impact property of TZ1000G carbon fiber reinforced composites is superior to that of the CCF300 carbon fiber, CCF700S carbon fiber and CCF800H carbon fiber reinforced composites. Also, the volume fraction of carbon fiber can improve the anti-high speed impact property of the composites. Meanwhile, the results also indicate that failure modes are highly dependent on the impact velocity. Specifically, when the impact velocity is low, a circular pit with fiber delamination appears around on the impact surface of the composites while delamination appears on the back surface along the fiber direction. Also, when the impact velocity is high, a circular hole with fiber delamination around is formed on the impact surface of composites, and the tearing fracture is observed on the back surface.

Keywords

• carbon fiber/bismaleimide resin composites
• prepreg
• autoclave molding
• anti-high speed impact property
• residual compressive property