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

Abstract

The polyimide fiber/ bismaleimide resin composites were prepared by the autoclave molding process. Effects of volume fraction of polyimide fiber and ambient temperature on the high speed impact properties were investigated using the air cannon impact test. The results demonstrate that the anti-high speed impact property of S35 polyimide fiber reinforced composites is superior to that of TC4 titanium alloy under equal area mass.And polyimide fiber composites have excellent high temperature anti-high speed impact property. Meanwhile, the results also indicate that the volume fraction of polyimide fiber can improve the anti-high speed impact property of the composites. Also, the ballistic energy absorption of polyimide fiber reinforced composites with 73% volume fraction at room temperature can reach 227.0 J, which is 240% higher than that of TC4 titanium alloy under equal area mass. Furthermore, when the impact velocity is low, the composites appear a circular pit with fiber delamination around on the impact surface, while the back surface appears delamination 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 large area fiber delamination along the fiber direction is observed on the back surface.

Keywords

• polyimide fiber/bismaleimide resin composites
• tc4 titanium alloy
• fan containment case
• autoclave molding
• anti-high speed impact property