INFLUENCE OF THREE DIMENSIONAL AND MULTIDIRECTIONAL BRAID STRUCTURES ON THE PROPERTIES OF COMPOSITES

In this paper a study was made on the properties of three dimensional and multidirectional braided composites with and without axial reinforcement under three braid stuctures 1×1, 1×2 and 1×3. The tensile strength and modulus, flexural strength and modulus of the composites were tested and analyzed. The results show that the three dimensional braided composite has good behaviour and the braid structures have a great influence on it. The fiber apparent angle and fiber volume fraction are two important factors in the improvement of properties. By means of adding in axially non-braiding reinforced fibers, the properties of braided composites including tension and bending have been improved considerably.