Abstract: The effects of the properties of the resin matrix modulus, winding angle and layer on the compressive properties of the carbon fiber composite winding products were studied. The results show that adjusting the content of PMDA in the MNA blending PMDA curing epoxy resin can effectively change the modulus of the cured resin. The resin modulus increases with the increase of the content of PMDA. When the content of PMDA was 5% of MNA, the modulus increased from 3.71 GPa to 4.18 GPa, which increased by 13%. When the content of PMDA was 10% of MNA, the modulus reached the maximum value of 4.61 GPa and increased by 24%. With the increase of matrix modulus, the compressive strength, shear strength and ring stiffness of unidirectional CFRP were increased at first and then decreased. When the matrix modulus was 4.18 GPa, the compressive strength and shear strength of CFRP reached the maximum value, which were 655 MPa and 71.6 MPa, and increased by 16% and 12%, respectively. At this point, the ring stiffness of the winding pipe reaches the maximum value of 277 kN/m² and increases by 87%. At the same time, increasing the winding angle and thickness can improve the anti-buckling stability of the winding pipe.

Key words: carbon fiber composites, matrix modulus, winding angle, ring stiffness