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Composite material connecting structure

A composite material and fiber composite material technology, which is applied in the field of high-strength composite material connection structures, can solve problems such as unfavorable large-scale production, high cost and fiber waste, etc.

Active Publication Date: 2013-04-17
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional reinforcement method is to use fiber fabrics such as fiber grid cloth or multi-axial cloth to obtain reinforcement sheets by cutting. In this technology, the reinforcement effect is not ideal because the fibers of the reinforcement sheets are cut; and The cutting process will cause waste of fibers. For more expensive carbon fiber materials, the cost is high, which is not conducive to industrial mass production

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0091] Preparation of composite parts

[0092] A general method for preparing a composite material part with the composite material connection structure of the present invention comprises the following steps: preparing a fiber preform of the composite material with openings in the corresponding parts, and fixing the reinforcing sheet of the present invention on the composite material fiber After the corresponding position of the preform is solidified and molded, and then the parts are connected by bolts; or the reinforcing sheet is fixed at the corresponding position of the formed open-hole composite material, and after the secondary curing and molding, pass the fastener ( such as bolts) for assembly.

[0093] Fabrication of Composite Connected Structures

[0094] According to the shape, size and force of the hole in the composite laminate, design a suitable reinforcement sheet, use the prepared reinforcement sheet to reinforce the hole in the composite laminate, and then con...

Embodiment

[0112] First, prepare as figure 1 Fiberglass / epoxy composite bolted specimens of dimensions indicated. The preparation method of the above-mentioned glass fiber / epoxy resin composite material bolt connection sample is as follows:

[0113] Step 1: In finite element analysis software such as ANSYS or ABAQUS, perform force analysis on the composite components connected by fasteners to obtain the principal stress distribution around the screw holes.

[0114] Step 2: According to the principal stress vector distribution around the opening, use relevant software to draw the trajectory of tensile stress and compressive stress respectively.

[0115] Step 3: On the basis of the principal stress trajectory obtained in step 2, arrange the circular helical trajectory along the tensile stress trajectory, arrange the radial trajectory along the compressive stress trajectory, and finally connect these trajectories into a whole to form a complementary The fiber placement track of the strong...

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Abstract

The invention discloses a composite material connecting structure. Specifically, the invention provides a reinforce sheet prepared by designing the fiber track according to the principle stress borne by the composite material connecting structure and a preparation method of the reinforce sheet. Compared with the common fabric reinforce sheet in the prior art, the reinforce sheet has the advantages of simple and convenient design, excellent reinforcing effect, no need of cutting, applicability for mass production and the like. By using the reinforce sheet to reinforce the opening part of the composite material connecting structure, the forming process is simple and flexible, the reinforcing efficiency is greatly improved, and the extremely board application prospect is provided.

Description

technical field [0001] The invention relates to the technical field of fiber composite materials, in particular to a high-strength composite material connection structure and a preparation method thereof. Background technique [0002] Fiber-reinforced composite materials have a series of excellent properties such as high specific strength, high specific modulus, fatigue resistance, corrosion resistance, and strong designability, and have been widely used in aerospace, navigation, national defense, transportation, chemical machinery and other fields. The structural connection methods of composite materials mainly include adhesive connection and mechanical connection. Since the mechanical connection can transmit large loads and is convenient for disassembly, inspection and maintenance, mechanical connections are often used at the main load-bearing structural connections of composite materials. [0003] However, mechanical joining requires drilling of holes in the joint area, ...

Claims

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Application Information

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IPC IPC(8): B29C70/08B32B5/26B29C70/30
Inventor 秦永利祝颖丹蔡晶滑聪孟令军范欣愉
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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