Preparation and properties of high stiffness hybrid carbon fibers composites

Abstract

With domestic high-strength medium modulus CCF800H carbon fiber as the basic reinforcement material， CCM40J and CCM55J high modulus carbon fibers as the hybrid reinforcements， and AC631 high-temperature bismaleimide resin as the matrix， the in-plane hybrid prepregs with different fiber ratios were prepared. Combined with the autoclave molding process， the mechanical properties of five groups of composite materials with different carbon fiber hybrid ratios were prepared and characterized. According to the test results， the changes in the mechanical properties of different hybrid composite systems were analyzed， and three groups of typical hybrid ratio composite systems， CCF800H/CCM40J （5∶5）， CCF800H/CCM40J （4∶6）， and CCF800H/CCM55J （5∶5）， were obtained， all of which showed good mechanical properties. This can provide reference basic material performance data for developing aircraft composite structural parts.

Keywords

• carbon fiber
• hybrid prepreg
• composite
• mechanical property