Preparation method of mortise and tenon joint carbon fiber composite laminate plate

A technology of composite material layer and composite material, which is applied in the field of preparation of carbon fiber composite laminates, and can solve problems such as eccentric loads

Inactive Publication Date: 2020-04-28
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the technical problem of eccentric load in the connection of existing composite materials, a method for preparing carbon fiber composite laminates with mortise and tenon connection is provided

Method used

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  • Preparation method of mortise and tenon joint carbon fiber composite laminate plate
  • Preparation method of mortise and tenon joint carbon fiber composite laminate plate
  • Preparation method of mortise and tenon joint carbon fiber composite laminate plate

Examples

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Embodiment 1

[0026] A method for preparing a mortise and tenon joint carbon fiber composite laminate, comprising the following steps:

[0027] (1) Preparation of the carbon fiber composite laminate of the laminate structure: take the width direction of the carbon fiber composite laminate of the laminate structure as the 90° direction, and place the TY carbon fiber from top to bottom according to 70°, -70° , 90°, -70°, and 70° in order to lay up 5 layers in total, and the thickness of each layer of carbon fiber is 1mm; the layered TY carbon fiber is vacuum packaged, and HYG epoxy resin matrix is ​​injected between each layer of carbon fiber, and placed Carry out hot press molding in a hot autoclave. The hot press molding process is to raise the temperature to 145°C, keep the temperature for 50 minutes, then add an external pressure of 1MPa, then keep the pressure and continue to heat up to 180°C, keep the heat for 3 hours, and then press at a constant speed. Cool down to below 60°C, restore...

Embodiment 2

[0031] The laminated board of this embodiment is the same as that of Embodiment 1, the difference is that in the step (1), the laying angle a=45, the internal angle of the corresponding isosceles trapezoidal tenon and tenon is 45 °, and the temperature of thermocompression forming is 150 °C, keep warm for 30min; the curing temperature in step (3) is 100 °C.

Embodiment 3

[0033] The laminated board of this embodiment is the same as that of Embodiment 1, the difference is that in step (1), the laying angle a=60, the inner angle of the corresponding isosceles trapezoidal mortise and tenon is 60°, and the temperature of thermocompression forming is 143°C. °C, keep warm for 40min; the curing temperature in step (3) is 110 °C.

[0034] The method of the invention can effectively solve the defects of the prior art laminated board connection method, and the prepared laminated board can greatly improve the bearing capacity of the overall connection; and the carbon fiber layup at the mortise and tenon joint is well preserved, which can ensure that the carbon fiber is in a complete and continuous under high load conditions; since the two laminates are at the same level, the use of mortise and tenon joints can avoid the failure form of tearing at the joint caused by eccentric loads, and it can also provide stronger strength for thicker laminates. Bearing ...

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Abstract

The invention relates to a preparation method of a mortise and tenon joint carbon fiber composite laminate plate. The preparation method comprises the steps that a carbon fiber laying structure is utilized, carbon fiber laying is carried out in the sequence of a degrees, -a degrees, 90 degrees, -a degrees and a degrees, and a laminate plate is prepared after hot press molding of a resin matrix; and the ends are machined to be isosceles trapezoid mortises and tenons at the ends according to the laying angle a, the mortises and the tenons are connected in the same plane, and the joints are bonded by using an adhesive to form the mortise and tenon joint carbon fiber composite laminate plate. The laminate plate prepared through the method can greatly improve the bearing capacity of integral connection; carbon fiber laying layers at the mortise and tenon joints are intact, and it can be guaranteed that carbon fiber can bear higher load force under the condition that the carbon fiber is complete and continuous; and the damage form of tearing at the joints due to eccentric loads can also be avoided, and higher bearing strength can also be provided for thicker laminated plates.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a method for preparing a mortise and tenon joint carbon fiber composite laminate. Background technique [0002] In recent years, due to the rapid development of green manufacturing and lightweight technology, composite materials have strong designability, high specific strength and high specific modulus, so that composite materials have been widely used. As an important way of structural integration, composite material connection technology It occupies an important position in the application field of composite materials. [0003] The current connection methods of composite materials mainly include mechanical connection, adhesive connection and hybrid connection. The mechanical connection will cause local stress damage around the drilled hole, and it is easy to damage the laminated fiber of the composite laminate when opening the hole, which affects the force distrib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/54B29C70/36B29C65/48B29C65/56B29C35/02
CPCB29C35/02B29C65/4805B29C65/56B29C66/124B29C66/43B29C70/342B29C70/36B29C70/54
Inventor 韩子健周金宇薛亚平周长亮
Owner JIANGSU UNIV OF TECH
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