Abstract: In this paper, three kinds of multiaxial warp-knitted carbon fiber composites were prepared by the same process. The impact, compression and friction characteristics of carbon fiber composites with different weaving methods were studied. The results show that the three-axis (±45°/90°) carbon fiber composite show outstanding impact properties. Compared with the two-axis (±45°) composite, the three-axis impact strength is increased by 90%. While compared with the four-axis (-45°/0°/+45°/90°) composite, the three-axis impact strength is increased by 45%. Compression strength of two-axial (±45°), three-axial (±45°/90°) and four-axial (-45°/0°/+45°/90°) carbon fiber composites are increased with the increase of weaving angle. Compared with the four axis and the two axis, the compression strength increases by 125.7%. Temperature has a direct effect on the friction properties of composites. Compared with plain weave carbon fiber composites at room temperature, the friction coefficient of multiaxial warp-knitting carbon fiber composites is lower and the friction stability is higher. With the increase of the test temperature, the friction coefficient of composites decreases first and then increases. When the temperature is 150 ℃, the friction coefficient of composite reaches its minimum value.

Key words: multiaxial warp-knitting structure, composites, impact property, compression property, friction performance