Metal-lined carbon fiber composite barrel and its prestressing method

Abstract

The invention relates to a metal lining-contained carbon fiber composite material body pipe and a prestress application method thereof. The body pipe comprises a metal lining, a metal tail pipe and a carbon fiber composite material layer; the metal lining is joined with the metal tail pipe; an annular groove is formed in the outer periphery of a cylinder body of the metal lining; and the carbon fiber composite material layer is corresponding wound in the annular groove, and has a tendency of annularly pressing the metal lining. The body pipe with the structure adopts the design mode of segmented assembly to relieve the weight of each section so as to bring convenience to carry; annular prestress is generated between the carbon fiber composite material layer and the metal lining, so that the two are tighter in contact; the carbon fiber composite material layer is suffered from annular tensile stress; and the metal lining is suffered from annular pressure stress, so that the stress conditions of the metal lining are improved.

Description

technical field [0001] The invention relates to a metal-lined carbon fiber composite material pressure-bearing barrel structure and a corresponding prestressing method. Background technique [0002] The development of modern military technology requires future weapons and equipment to have the characteristics of lightness, maneuverability, flexibility and quick response, so new structures and functional materials must be vigorously developed. Among them, fiber composite materials have the advantages of light weight, high strength, no rust, corrosion resistance, fatigue resistance and good designability, and are currently the most widely used type of new materials. However, the fiber composite material has poor ablation resistance and airtightness, so a layer of metal material is generally added to the inner wall of the fiber composite material launching tube. It is strong and has good sealing performance, which can meet the requirements of various weapon platforms for the u...

AI Technical Summary

Problems solved by technology

[0004] One: The composite material layer wound on the outer surface of the metal lining needs to be cured at high temperature. For example, if a thermosetting polyimide resin is used, the curing temperature is above 300 degrees. At such a high curing temperature, the metal lining expands, and the outer surface The carbon fiber composite material layer is not sensitive to temperature, and basically does not expand at high temperatures. After the thermal expansion of the metal lining, the carbon fiber composite material layer wound on the outer surface will be stretched. Gaps are generated at the interface of the metal lining, and the combination is not tight, so that the carbon fiber composite material layer cannot play the role of strengthening the circumferential strength of the barrel

[0005] Second: the modulus of the metal lining is generally 200GPa, and the yield strength is 1280MPa, while the hoop modulus of the carbon fiber (T800) composite layer is generally smaller than the modulus of the metal, generally 180GPa, and the strength is about 3000MPa, because the composite material The hoop modulus is smaller than the metal lining, so when the live ammunition is fired, the hoop stress on the carbon fiber composite material layer is less than the hoop stress on the metal lining and far lower than its own strength, resulting in material waste

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