Variable cross-section fiber reinforced composite pipe and pipe-die integrated forming method

Abstract

The invention discloses a variable cross-section fiber reinforced composite pipe and a pipe-die integrated forming method. The method includes the steps of step 1, steel core die manufacturing and installation in which a steel core die is manufactured and installed, and a metal die is made of thin-wall steel into the shape of the interior of the composite pipe; step 2, steel core die winding in which the steel core die is wound with long fibers to form a fiber composite laying layer; step 3, fiber composite laying layer curing in which an external installed metal outer die integrally wraps thefiber composite laying layer, and the fiber composite laying layer is placed into a curing box for curing; and step 4, machining in which the metal outer die is taken down after curing and machined and installed according to needs. The variable cross-section fiber reinforced composite pipe comprises a middle linear round pipe, transition section conical pipes at the two sides, and end connector parts. The process is free of demolding and the die directly serves as a combined component to be integrally stressed with the composite pipe, so that the overall strength and stability of the composite pipe are improved, a complex demolding process is avoided; and the transition between the composite pipe and a metal structure is provided by the connector parts at the ends, and the composite pipecan be more easily applied to the field of high-performance works.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a variable cross-section fiber reinforced composite material pipe and a pipe-mold integrated forming method. Background technique [0002] Composite laminated pipes are widely used as the main load-bearing components in structures such as military composite truss bridges, composite truss wings, and spacecraft composite legs. In these structures, composite laminated pipes are subjected to pressure as Due to the various complex resultant forces of the main body, the pressure bearing capacity and stability of its rods are a prominent issue. For this reason, according to the theory of structural stability, the optimization result of traditional pressure bar instability is to adopt the spindle configuration. In the actual design process, the laminated circular tube structure is used as the basic configuration of the pressure bar. Considering the manufacturing process Ac...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a variable cross-section fiber reinforced composite material pipe and a pipe-mold integrated molding method, which overcomes the difficulty of demoulding in the production process of the existing variable cross-section composite material pipe, high production cost, complicated process, and unstable structural performance And other issues

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