Profiling three-dimensional fabric

Abstract

The invention provides profiling three-dimensional fabric. The profiling three-dimensional fabric comprises X-Y plane profiling unit layers and Z-direction fiber bundles penetrating through the X-Y plane profiling unit layers. Each X-Y plane profiling unit layer comprises at least one continuous fiber profiling layer and a plurality of fiber mesh felt layers. The multiple X-Y plane profiling unitlayers are stacked in the Z direction. By arranging at least one continuous fiber profiling layer on the X-Y plane profiling unit layers, the profiling continuity of plane fibers of the finally-formedprofiling three-dimensional fabric is good, and the laying mode and the angle of the continuous fibers of the profiling three-dimensional fabric are high in designability; and meanwhile, by arrangingthe Z-direction fiber bundles in a penetrating mode, the X-Y plane profiling unit layers of the adjacent layers are connected and fixed.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a profiled three-dimensional fabric. Background technique [0002] This section is intended to provide a background or context for implementations of the invention that are recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] The new type of aircraft is flying at hypersonic speed for a long time in the adjacent space. In order to improve its flight speed and performance / function, it is developing in the direction of light weight and high performance. The structure and performance of the material are highly designable and meet the development requirements of new aircraft. Therefore, its load-bearing parts, such as load-bearing frames, rudders, ventral fins, side panels and other special-shaped parts, have gradually changed from metal materials to fiber prefabricated parts. It is a full-composite materi...

AI Technical Summary

Problems solved by technology

[0003] The new type of aircraft is flying at hypersonic speed for a long time in the adjacent space. In order to improve its flight speed and performance / function, it is developing in the direction of light weight and high performance. The structure and performance of the material are highly designable and meet the development requirements of new aircraft. Therefore, its load-bearing parts, such as load-bearing frames, rudders, ventral fins, side panels and other special-shaped parts, have gradually changed from metal materials to fiber prefabricated parts. Full-composite materials for reinforcement skeletons, but such parts have complex shapes, and it is difficult for existing fiber prefabrication to meet the high requirements of light weight and better high-temperature mechanical properties

[0004] In the existing reports on fiber preforms with special-shaped cross-sections, three-dimensional fabrics with variable cross-sections or special-shaped cross-sections formed by three-dimensional weaving are disclosed. It is formed by interweaving in the length direction. Once post-processing, short fibers will be formed, resulting in a reduction in the content of continuous fibers in special-shaped cross-sections, making it difficult to meet the profiled reinforcement of continuous fibers; the existing 2.5D process cannot integrally form hollow airfoil load-bearing frame fabrics; in addition, Common three-dimensional fabrics that run through continuous fibers in the Z direction to connect plane woven fabric layers, use 0°, 90° fiber interweaving plane woven fabric profiling layup, 0°, 90° fibers are often broken at the joints of special-shaped sections or at the edge of the contour Open, the continuous fiber content in the plane is low, and it cannot meet the high requirements of the mechanical properties of the load-bearing parts in the high temperature environment

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