Abstract: By optimizing the composite process of 2D braided composites tubes, the carbon fibre composite tubes containing high carbon fiber content were made. The axial compression performance test of the tubes fittings was carried out, and the influence of braiding parameters on the volume content and axial compressive properties of the composite tubes fittings was analyzed and discussed. The results show that the optimized composite process can keep the volume of the composite tubes fiber between 20%~40%, while the inner diameter of the composite tubes is consistent. In the case of constant braiding speed, with the decrease of braiding pitch, the braiding angle gradually increases and the tubes volume fraction increases gradually. When the braiding pitch reduces to a certain extent, fiber volume content increases slowly, while the compressive strength increases first and then decreases. When it reaches the maximum, the braiding angle is 46 degrees.

Key words: two dimensional braided, composites tubes, composite process, fiber volume fraction, axial compression