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Connection method for resin-based carbon fiber composite truss rod members

A composite material and truss rod technology, which is applied in the field of composite material rod connection, can solve the problems of inability to take into account the connection strength, strong process realization and high precision, and achieve the effect of shortening the preparation cycle, ensuring geometric accuracy and realizing standardized process.

Inactive Publication Date: 2013-04-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a resin-based carbon fiber composite material truss bar connection method to solve the problem that the bar connection in the current composite material truss cannot take into account high connection strength, small quality, high precision and strong process realization

Method used

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  • Connection method for resin-based carbon fiber composite truss rod members
  • Connection method for resin-based carbon fiber composite truss rod members
  • Connection method for resin-based carbon fiber composite truss rod members

Examples

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specific Embodiment approach 1

[0014] Specific implementation mode one: combine Figure 1-Figure 5 In this embodiment, the method in this embodiment includes the following steps: Step 1. Prepare a thin carbon fiber composite material shell 2: first, a layer of release agent needs to be applied to the curved surface groove of the metal preparation mold 1, and then the cut epoxy Resin-based carbon fiber prepreg is hand-laid on the curved groove of the metal preparation mold 1, compacted and air bubbles are discharged, pressurized by vacuum bag method and placed in a curing oven for curing. The curing temperature is 120°C and the curing time is 3 hours. Then heat up to 170°C and solidify for 4 hours, and then cool naturally with the furnace; complete the production of thin shell 2;

[0015] Step 2. Preliminary connection and fixation of the rods: use sandpaper to polish all the surfaces of the thin shell 2 and the outer surface of the connecting part of the rods, fix the spatial position of the rods to be conn...

specific Embodiment approach 2

[0019] Embodiment 2: In step 1 of this embodiment, the thickness of the thin shell 2 is 0.5mm, which can enhance the bending resistance of the connection without making the additional mass of the connection too large. Other implementation steps are the same as those in the first embodiment.

specific Embodiment approach 3

[0020] Specific implementation mode three: combination image 3 To illustrate this embodiment, in Step 3 of this embodiment, the number of winding layers of the carbon fiber bundle 3 is 2-3 layers, so as to improve the connection strength of the rods. Other implementation steps are the same as those in the first embodiment.

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Abstract

The invention discloses a connection method for resin-based carbon fiber composite truss rod members, and relates to a connection method for composite rod members. The method solves the problems that high connection strength, small mass, high precision and high technology realizability cannot be compromised in rod member connection in a composite truss at present. The method comprises the following steps that a carbon fiber composite thin shell is prepared; the rod members are preliminarily connected and fixed; a carbon fiber bundle is soaked with resin; the carbon fiber bundle soaked with the resin is manually guided to continuously wind along the external surface of the thin shell; a layer of continuous T700-3K plain carbon cloth is laid on fastening surfaces of a plurality of pressing metal molds; the pressing metal molds are buckled outside the corresponding thin shell wound with the carbon fiber bundle; the pressing metal molds are fastened; joints are pressed; and then, connection parts of the rod members are sent into a curing furnace for curing. The method is used for connecting the composite truss rod members.

Description

technical field [0001] The invention relates to a method for connecting composite material bars. Background technique [0002] Composite truss structures have many advantages and are widely used in the aerospace field, as well as in lightweight large-span civil structures. The connection of the members in the composite truss is the key to the bearing capacity of the truss, and often becomes the weak link in the use of the composite truss. At present, composite trusses are mainly assembled by bonding formed composite material rods and joints. The rods are connected by joints, and the joints are mostly metal joints. The metal joints are of high quality, the thermal expansion coefficients of the joints do not match, and the strength of the joint interface is low. In addition, the assembled truss also has the problems of poor assembly accuracy and difficult assembly. At present, the member connections of composite trusses have not yet met the requirements of high connection st...

Claims

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Application Information

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IPC IPC(8): B29C65/00
Inventor 谭惠丰熊波罗锡林
Owner HARBIN INST OF TECH
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