Development And Mechanical Behavior Of A Overlapping Warp 3D Woven Composite

Hollow woven composites are widely used as matrix in aeronautics and vehicles. This paper developed a new shape of overlapping woven hollow composite. The new structure composite is woven with overlapping warp integral panel enhancing method. In order to weave it out, a new structure of heald has been innovated. In this new structure composite, the linking warp and warp weaving with weft in the same longitude cross section. Compared with other hollow structure woven composites, this new structure composite has higher weaving density, damage tolerance, more designable structure and large tow carbon fiber applicable. This paper introduced the structure of the overlapping woven composites and the heald frame first. Then gave three design plan the muti-skin layer, muti-distance and embedded enhancing structure to improve the anti-bending and compression resistance ability of the hollow structure composites. The three kind structure composites were made and the mechanical properties of the composites were tested. The experimental results of the muti-skin layer and muti-distance composites showed that the Young's modulus and failure loads of the composites are increased significantly. The experimental results of the muti-distance composites showed that the compression resistance ability haven't had a noticeable decline compared with the"8"shape woven composites. The experimental results of the embedded enhancing structure composites indicate that the mechanical property of the embedded woven composites is better than the hollow composites, and the enhanced coefficient of the plain pressing embedded woven preform and the resin reaches 1.40.