Fiber composite material crossed rib thin laying layer and preparation method thereof

A fiber composite material and rib technology, which is applied in the field of composite material structure design and preparation, can solve the problems of local macro uplift in the overlapping area and the reduction of stress concentration and axial bearing capacity at the same time, so that the axial bearing performance will not decrease. , to avoid the effect of local bulge

Pending Publication Date: 2022-02-22
SUN YAT SEN UNIV
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  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects in the prior art that the local macroscopic uplift, stress concentration and axial bearing capacity reduction in the cross-overlapping area cannot be solved at the same time, and to provide a method for preparing a thin cross-rib laminate of fiber composite materials

Method used

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  • Fiber composite material crossed rib thin laying layer and preparation method thereof
  • Fiber composite material crossed rib thin laying layer and preparation method thereof

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Embodiment 1

[0034] This embodiment provides a rib cross-lamination and a preparation method thereof, comprising the following steps:

[0035] S1: laying the rib end area, the intersection area and the transition area between the two end areas and the intersection area, specifically including:

[0036] S11. Place a comb-toothed mold at both ends of the transition zone of the ribs. The structural diagram of the comb-toothed mold is as follows figure 2 As shown, the comb-toothed mold includes a first comb-toothed mold 6 and a second comb-toothed mold 7, wherein the first comb-toothed mold is located at one end of the transition zone (such as figure 2 In 6), there are 8 comb teeth, the distance between adjacent teeth is 2 (mm), and the remaining comb teeth are arranged in parallel at the other end of the transition zone, with 17 comb teeth, and the distance between adjacent teeth is 2 (mm);

[0037] S12. Laying several fibers crosswise, the fibers are oriented in parallel at both ends of ...

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Abstract

The invention provides a fiber composite material crossed rib thin laying layer and a preparation method thereof. The fiber composite material crossed rib thin laying layer is prepared by the following steps: S1, a plurality of fibers are laid in one direction to form single-layer laying layers, and the adjacent single-layer laying layers are laid in a crossed manner to form rib two end areas, a crossed area and a transition area between the two end areas and the crossed area; and s2, the ribs in the transition area are gradually widened and thinned, so that the maximum value of the width of the ribs in the transition area is larger than the width of the ribs in the two end areas; the width of the ribs in the crossed area is consistent with the minimum width of the ribs in the transition area, and a rib cross laying layer is obtained. According to the invention, the transition area is designed, and the ribs in the transition area are gradually widened and thinned, so that the thickness of the ribs in the cross area is thinned, local upheaval is avoided, and the axial bearing performance is improved.

Description

technical field [0001] The invention belongs to the field of composite material structure design and preparation, and in particular relates to a fiber composite cross-rib thin layer and a preparation method thereof. Background technique [0002] For continuous fiber reinforced composite lattice structure (including truss structure, grid structure, etc.) The overlapping area is raised and thickened, and the fibers are bent out of plane. The conventional cross-rib preparation process includes the direct stacking method of continuous fibers (Solovyev P V, Gomzin A I, Ishbulatov L ​​A, et al. Stress-StrainState Exploration of Stringer Made of Composite Materials Depending on Layers Stacking Structure[J]. 284:71-76.) and fiber fabric cutting method (Pekmezci B Y, Opurolu A. Mechanical Properties of Carbon-Fabric-Reinforced High-Strength Matrices[J].Materials,2020,13(16):3508.). The former will lead to local macroscopic uplift and stress concentration in the cross-overlapping ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/54
CPCB29C70/34B29C70/54
Inventor 江大志刘佳音陈文多李晶
Owner SUN YAT SEN UNIV
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