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Integral forming method for sewing enhanced cross connector made of fiber reinforced resin matrix composite

A fiber-reinforced resin and composite material technology, applied in the field of composite material manufacturing, can solve problems such as weak strength and achieve the effect of improving interlayer strength

Inactive Publication Date: 2013-11-27
BEIHANG UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to provide an integral molding method of a sewing-reinforced fiber-reinforced resin-based composite material cross-shaped joint to solve the problem of relatively weak interlayer strength of the fiber-reinforced resin-based composite material cross-shaped joint

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  • Integral forming method for sewing enhanced cross connector made of fiber reinforced resin matrix composite
  • Integral forming method for sewing enhanced cross connector made of fiber reinforced resin matrix composite

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and implementation examples.

[0020] The flow chart of the present invention is as figure 1 As shown, the cross-shaped fiber preform is prepared first, and then the cross-shaped fiber preform is stitched and reinforced by unidirectional fiber threads, and then the cross-shaped fiber preform after sewing is put into the mold and positioned for mold clamping , and then vacuumize, inject resin, heat up and solidify, and finally open the mold to take out the solidified sewing-reinforced fiber-reinforced resin-based composite material cross joint. exist figure 2 Among them, the sewing-reinforced fiber-reinforced resin-based composite cross-shaped joint is composed of an upper T-shaped laminate 1, a lower T-shaped laminate 2, an intermediate laminate 3, a triangular area 4 and a sewing fiber thread 5, and the triangular area 4 is made of Unidirectional fiber bundles for fil...

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Abstract

The invention discloses an integral forming method for a sewing enhanced cross connector made of fiber reinforced resin matrix composites. The method comprises five main steps: 1, preparing cross fiber performing body; 2, allowing the cross fiber performing body to be subjected to sewing enhancement through sewing fiber threads; 3, putting the obtained performing body in a die, followed by positioning and die closing; 4, vacuum-pumping, pouring resin and curing through temperature increment; 5, performing die opening, and taking out cured and formed the sewing enhanced cross connector made of the fiber reinforced resin matrix composite. According to the method, a composites RTM forming process method and a sewing enhancement method are integrated, so that the interlayer strength of the cross connector is improved.

Description

technical field [0001] The invention provides an integral molding method of a sewing-reinforced fiber-reinforced resin-based composite material cross-shaped joint, which belongs to the technical field of composite material manufacturing. Background technique [0002] Cross joints are widely used in modern marine and aerospace structures. The traditional cross joint is welded by metal materials, which has a high density, which is not conducive to the weight reduction design; in addition, the fatigue performance of the metal is poor, and cracks are prone to occur at the solder joints of the cross joint under the action of fatigue load, which will lead to catastrophe Structural damage. Compared with traditional metal materials, composite materials have higher specific stiffness and specific strength, so they are widely used in structural lightweight design, and the structural fatigue problems caused by welding, screwing and other connection methods in the past have also been g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34
Inventor 熊峻江付裕彭勃程序
Owner BEIHANG UNIV
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