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Hub type rigid flange of rib-added composite foam sandwich barrel and preparation method thereof

A foam and reinforcement technology, which is applied in the field of new materials, new structures and combined structures, can solve the problem that the connecting flange of the composite foam sandwich tube cannot meet the large load-bearing requirements, the composite skin has weak supporting capacity, and the face core debonding fails and other problems, to achieve the effect of superior surface-core bonding strength, high-efficiency play of strength, and high surface-core bonding strength

Inactive Publication Date: 2018-08-24
ARMY ENG UNIV OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low rigidity of the foam, the support ability of the composite skin is weak, which leads to local instability of the skin under axial compression; core disbond failure
The above defects lead to the failure of the connecting flange of the composite foam sandwich tube to meet the large load requirements
Moreover, the current preparation methods of composite foam sandwich tubes are mainly hand lay-up and secondary curing processes, and only small-sized components can be produced.

Method used

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  • Hub type rigid flange of rib-added composite foam sandwich barrel and preparation method thereof
  • Hub type rigid flange of rib-added composite foam sandwich barrel and preparation method thereof

Examples

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Effect test

Embodiment 1

[0031] This embodiment provides a rigid flange with a neck of a reinforced composite foam sandwich tube, the structure of which is as follows figure 1 As shown, the main body of the necked rigid flange includes a neck, a support part and a flange part. Ring-shaped structure, one end of the neck is connected to the smaller end of the support part, and the larger end of the support part is connected to the flange part; a connecting flange is provided at one end of the foam sandwich tube for connection with another necked rigid method The flanges are connected, and steel plates are added in the middle of the flange; the neck includes composite material inner skin 1 and composite material outer skin 8, and vertical foam slats 2 are evenly distributed between the composite material inner skin 1 and composite material outer skin 8 Composite strip reinforcement 3, the composite strip reinforcement 3 is equally spaced between the vertical foam slats 2, the composite interior skin 1 an...

Embodiment 2

[0041] This embodiment provides a method for preparing a rigid flange with a neck of a reinforced composite foam sandwich tube, which consists of a composite material inner skin, a composite material outer skin, foam sandwiched between two skins, foam It is composed of composite material ribs between the two skins; the height of the reinforced composite foam sandwich tube is 1000mm, and the inner diameter is 200mm; the composite material inner skin and the composite material outer skin are reinforced by glass fiber biaxial cloth Composed of resin-based composite materials, the thickness is 3mm; the foam material has a density of 100kg / m 3 PVC foam with a thickness of 40mm; the composite ribs are made of glass fiber unidirectional cloth reinforced resin-based composites.

[0042] Including the following specific steps:

[0043] (1) Prepare PVC foam: According to the design requirements of component size, PVC foam is provided by Beijing Colas Co., Ltd., with a density of 100kg / ...

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Abstract

The invention discloses a hub type rigid flange of a rib-added composite foam sandwich barrel and a preparation method thereof. The hub type rigid flange is characterized in that a hub type rigid flange body comprises a hub part, a supporting part and a flange part, wherein the hub part is the foam sandwich barrel which is of a hollow cylindrical structure; the supporting part is of a hollow circular table shaped structure; the flange part is of a disc shaped or circular ring shaped structure; one end of the hub part is connected to one small end of the supporting part, and one big end of thesupporting part is connected to the flange part; a connecting flange is arranged at one end of the foam sandwich barrel and is connected to another hub type rigid frame; a steel plate is additionallyarranged in the middle of the flange part. With the adoption of the hub type rigid flange of the rib-added composite foam sandwich barrel, the problem of connecting of the composite foam sandwich barrel can be effectively solved on the premise that the dead weight of the structure is nearly not increased; and meanwhile, the preparation method is provided and is low in cost, stable in performance,and can be carried out to prepare large-size hub type rigid frame of the rib-added composite foam sandwich barrel.

Description

technical field [0001] The invention belongs to the field of new materials, new structures and combined structures, and relates to a foam sandwich tube connection flange suitable for rapid erection and emergency repair and a preparation method thereof, in particular to a reinforced composite foam sandwich tube with neck Rigid flange and method of making same. Background technique [0002] Emergency columnar support members in the field of civil engineering are often made of metal materials, which have a large dead weight, are inconvenient to carry and operate, and prolong the erection time. In addition, metal materials are easy to corrode, and the maintenance cost is high, which affects the normal use and operation of the structure. life. The use of new materials to develop light-weight, high-load-bearing, easy-to-handle and erect, and corrosion-resistant emergency piers can replace metal materials to a certain extent, and then the connection problem with the upper and lowe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/36F16B1/02
Inventor 刘建邦李峰乐超赵志波张冬冬陶杰
Owner ARMY ENG UNIV OF PLA
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