Abstract: High strength alkali-free glass fibers were used as raw materials in the paper, and three-dimensional five-direction and full five-directional braided fabrics were both prepared on full-automatic modular braided machine by using braided craft of four-step rule 1×1. Three-dimensional five-direction and full five-directional braided composites were prepared by combined braided fabrics with resin matrix, which including epoxy resin E51 and firming agent 70＃ (tetralin phthalic anhydride). Compressive properties of above braided composites were tested by using Instron universal testing machine, and influence of structure parameters, like axis yarns, braided angles and fiber volume fraction, on compressive properties was studied too. The results shows that compressive properties increased with the increase of axis yarns and fiber volume fraction, and decreased with the increase of braided angles. Compressive property of three-dimensional full five-directional composites were better than that of three-dimensional five-directional ones.

Key words: three-dimensional five-direction, three-dimensional full five-direction, braided composite, compressive property, braiding angle, axis yarn, fiber volume fraction