Carbon fiber reinforced polyether ether ketone (CF/PEEK) is a kind of high performance thermoplastic composite material

which has broad application prospects in aviation manufacturing industry. There are significant differences in thermal history between the different axial and radial positions of the hole circumference in the process of hole making and cooling process of this material

and the cooling process is closely related to the recrystallization process of thermoplastic resin. In order to further clarify the influence of drilling heat on the performance around the hole

the effect of drilling heat on properties of CF/PEEK resin was studied in this paper. Firstly

the PEEK sample was pretreated by simulating the thermal history around the hole

and then the material mechanical parameters were measured. Secondly

the fiber parameters were introduced

the material mechanical parameters of CF/PEEK were deduced and the crystallinity was determined. Finally

the relationship between the cooling rate and the material properties was established

and the effect of drilling heat on the mechanical properties of CF/PEEK was clarified. It is found that as the cooling rate decreases

the lower cooling rate has a beneficial effect on the resin properties

the crystallinity of the PEEK matrix will increase

and the tensile strength will increase. While the tensile strength and elastic modulus of the material are the lowest under rapid cooling

which are 65.32 MPa and 3.3 GPa

respectively.