Woven composite semicircular pipe manufacturing method capable of reducing curing springback

Abstract

The invention provides a woven composite semicircular pipe manufacturing method capable of reducing curing springback. The woven composite semicircular pipe manufacturing method capable of reducing curing springback comprises the following steps that a first U-shaped mandrel and a second U-shaped mandrel are oppositely buckled to form an elliptic mandrel; the elliptical mandrel is made into a fabric reinforcement body by using carbon fiber and glass fiber through an annular weaving method; after each layer of carbon fiber and glass fiber is woven on the outer layer of the elliptical mandrel, the joint of the elliptical mandrel is fixed through adhesive tape, cutting is conducted along a cutting line, and the upper fabric portion and the lower fabric portion of the fabric reinforcement body are separated to obtain two U-shaped fabrics; each cut U-shaped fabric is placed in a U-shaped mold for curing, and a U-shaped composite pipe is obtained; and the redundant part in the U-shaped composite pipe is cut to obtain a fiber reinforced composite of a semicircular pipe structure is obtained. By cutting the fabric at the joint of the U-shaped mandrels, a fabric reinforcement body comprising a semicircle can be effectively cut out, curing resilience of the composite semicircular pipe can be effectively reduced, and the manufacturing precision of the composite semicircular pipe is guaranteed.

Description

technical field [0001] The invention relates to the technical field of fiber-reinforced composite material preparation, in particular to a method for preparing a braided composite material semicircular tube that reduces curing springback. Background technique [0002] Carbon fiber-reinforced composite materials have high strength and are mostly used in aerospace and other fields that require lightweighting. Fiber-reinforced composite components usually need to be cured by heating. Although the curing process strengthens the composite structure, it also introduces residual stresses that remain in the structure after cooling, causing structural deformation of the part after it is removed from the tool. [0003] Composite semicircular tubes have a wide range of application requirements as common structural parts, but the structural accuracy of semicircular tubes is also easily affected by curing springback. This leads to part parameters that do not meet the design specificatio...

AI Technical Summary

Problems solved by technology

Although the curing process strengthens the composite structure, it also introduces residual stresses that remain in the structure after cooling, causing structural deformation of the part after removal from tooling

[0003] As a common structural part, the composite material semicircular tube has a wide range of application requirements, but the structural accuracy of the semicircular tube is also easily affected by the curing springback

This leads to part parameters that do not meet the design specifications, and also makes installation difficult

And this may lead to the introduction of certain external forces during the assembly process, resulting in internal stress and even structural damage, affecting the service safety of components

Images