Preset weak area 2.5D woven composite fragile cover and preparation method thereof

Abstract

The invention discloses a preset weak area 2.5D woven composite fragile cover, and belongs to the technical field of missile firing and protection. The preset weak area 2.5D woven composite fragile cover a throwing body and a framework wrapping the periphery of the throwing body. The combined position of the framework and the throwing body is divided into a weft separation area and a warp separation area. The invention further discloses a preparation method of the preset weak area 2.5D woven composite fragile cover. A 2.5D woven part reinforced epoxy resin composite serves as the material of the preset weak area 2.5D woven composite fragile cover; and according to the defect presetting manner in the weft separation area, the quantity of weft yarn keeps unchanged, and the density of warp yarn is reduced; and according to the defect presetting manner in the warp separation area, the quantity of warp yarn keeps unchanged, and the density of weft yarn is reduced. The fragile cover is light, the separation areas are novel in structure, a cover body is formed integrally and does not need to be cut, the strength of the fragile cover can be adjusted according to different pressure parameter requirements by adjusting the density of the yarn of the separation areas of the fragile cover, the fragile cover can bear pressure within a specific range and can be smoothly separated and thrown out under the action of missile gas flow, and the fragile cover is of a novel structure.

Description

technical field [0001] The invention relates to a 2.5D woven composite fragile cover with a preset weak area and a preparation method thereof, belonging to the technical field of missile launch and protection. Background technique [0002] The design of the missile launching box cover is one of the important factors affecting the rapid response ability of the missile. Therefore, when developing the missile storage launching box, the design of the box cover is very important. The box cover is mainly able to withstand a certain pressure difference, has good sealing performance, and can be opened quickly when launching a missile. In order to meet the above-mentioned requirements, the missile launching box cover used to use a mechanical cover, an explosion bolt opening cover, etc. (US Pat. The hydraulic system is required to open the cover, and the mechanism is complicated, which not only increases the weight of the launch box and delays time, but the opening response of the e...

AI Technical Summary

Problems solved by technology

However, this kind of film cover is a laminated structure. Compared with the overall woven material, the interlayer performance and impact resistance are poor, and the production of its weak area must first cut the cover body and then glue it, and stick it on both sides of the glue joint. Cloth strips are used to enhance its structural strength, the process is complicated, and the quality stability is difficult to control

Therefore, there are certain limitations in the actual application of this type of launching box cover

Images