A splicing method for hollow composite material joints

Abstract

The invention relates to a splicing method for hollow composite material connectors. The splicing method comprises the following steps: A, respectively cutting one ends to be spliced of two hollow fabrics required to be spliced, so that the two hollow fabrics can be spliced seamlessly; B, paving the two hollow fabrics obtained by the step A, splicing one ends to be spliced of the two hollow fabrics seamlessly, and covering each of the upper surface and the lower surface at the splicing part with a reinforcing material layer; and C, infiltrating and curing the hollow fabrics and the reinforcing material layers by using resin. According to the splicing method for the hollow composite material connectors, the original structure of a product at the connector is not damaged, the product is not cut, punched, ground and the like, the phenomenon of concentrated stress and the like is avoided, the strength is relatively high, the hollow composite material is flat and has no obvious height change at the connector, and the internal cavities of the hollow composite material are continuous completely.

Description

technical field [0001] The invention belongs to the field of composite material preparation, and in particular relates to a splicing method for joints of hollow composite materials. Background technique [0002] Hollow fabric is a kind of three-dimensional reinforced material woven from glass fiber or carbon fiber, etc., and it becomes a hollow composite material after forming with resin through a certain process. Hollow composite materials have excellent properties of light weight and high strength. Compared with honeycomb materials and foam materials, hollow composite materials have the advantages of not easy to delaminate, strong designability, filling and pre-embedding, and good thermal insulation and heat insulation. , sound insulation effect, especially the hollow composite material has a continuous cavity inside, which can be widely used in the preparation of double-wall storage tanks as a structural layer, and the leakage monitoring can be realized through its intern...

AI Technical Summary

Problems solved by technology

Hollow composite materials have excellent properties of light weight and high strength. Compared with honeycomb materials and foam materials, hollow composite materials have the advantages of not easy to delaminate, strong designability, filling and pre-embedding, and good thermal insulation and heat insulation. , sound insulation effect, especially the hollow composite material has a continuous cavity inside, which can be widely used in the preparation of double-wall storage tanks as a structural layer, and the leakage monitoring can be realized through its internal cavity. However, due to the length and width limitations of the hollow fabric, Joints are unavoidable during use, and there is currently no report on the relevant processing methods for joints of hollow composite materials

If the common mechanical connection method is used, it will lead to stress concentration at the joint, which will greatly reduce the strength of the composite material at the joint. However, if referring to the solid FRP production process, the overlap of fabric joints will undoubtedly lead to hollow composite materials. Uneven thickness, and more importantly, neither can guarantee the continuity of the cavity inside the composite material at the joint

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