Micro-structure and properties of multilayer multiaxial woven composites

In order to study the tensile property and failure mechanism of multilayer multiaxial woven composites, based on the multilayer multiaxial weaving process and the spatial movement rule of yarn in the structure, the relationship between process parameters and structure parameters were deduced. Two kinds of multilayer multiaxial woven composites of different structures were prepared from carbon fibers and epoxy resin as raw materials by the multilayer multiaxial weaving process and the resin transfer molding composite process. The quasi-static tensile property of the material were measured by universal testing machine and a non-contact all-field stain meter, and was compared with that of three-dimensional orthogonal composite. The results show that the content of bias yarn in the structure has certain influence of the warpwise tensile property of the multilayer multiaxial woven composites. Bias yarn blocks cracks and strain from extending along the warpwise direction to a certain extent, and influences the failure modes of the material to a great extent. All the warps in the warp layer at the fracture of the sample are broken, and some of yarn in the bias yarn layer are not broken, and the tensioned samples are not completely broken. Copyright No content may be reproduced or abridged without authorization.