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Preparation method and unfolding and recovering method of thin-wall cylindrical shell structure

A cylindrical shell structure and thin-walled technology, which is applied in the field of preparation of thin-walled cylindrical shell structures, can solve problems such as limited application, inability to realize automatic retraction, and inability to recycle, etc., to achieve the effect of reversible change

Active Publication Date: 2021-08-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most of the existing thin-walled cylindrical shell structures are one-way unfolding structures, which cannot be automatically retracted, which means that the mechanism relying on the thin-walled cylindrical shell structure cannot be recovered after deployment, which greatly limits its application.

Method used

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  • Preparation method and unfolding and recovering method of thin-wall cylindrical shell structure
  • Preparation method and unfolding and recovering method of thin-wall cylindrical shell structure
  • Preparation method and unfolding and recovering method of thin-wall cylindrical shell structure

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specific Embodiment approach 1

[0018] DETAILED DESCRIPTION OF THE INVENTION The present embodiment is described in the preparation method of a thin-walled column shell structure, which is specifically:

[0019] Step 1: As the reinforcing material in a 1-3 layer, the shape memory polymer is formed as a resin matrix, and the shape memory composite material is prepared. The resin content of the composite is 65 to 85%, mainly in order to ensure the shape memory performance of the composite material. The fiber cloth that specifically selects 1 to 3 layers requires determination according to the type of different cloth, if it is too thick, it is not easy to fold, may no longer have a thin wall cylinder characteristic, if it is too thin, the mechanical properties are poor.

[0020] Step 2: Preparation of a sheet-like shape memory composite according to a particular size, after 0.5-6 hours of 60-120 ° C, initially, form a curl shape, then solidify, then curing, then curing at 120-200 ° C After heating 4-10h, complete, ...

specific Embodiment approach 2

[0029] DETAILED DESCRIPTION OF THE INVENTION 2: An unfolded recovery method of the thin-walled shell structure prepared, and the method is specifically: when the room temperature is present, the prepared thin-walled column shell can be elastically unfained under triggering force, to obtain the state of the arm, and complete the task Through the corresponding external (heat, electricity, light, etc.), trigger the shape memory performance, with the interim shape of the thin-walled column shell structure, and complete the entire deformation process under the shape memory effect, the interim shape of the thin-walled column shell structure.

Embodiment 1

[0031] The use of isophorone diamine, D230 is used as the curing agent, and the epoxy resin E51 is a resin matrix, the carbon fiber cloth is used as the reinforcing material, and the shape memory epoxy resin composite material is prepared, and the obtained matrix material is subjected to dynamic heat mechanical analysis (DMA), like figure 2 As shown, the T of the resulting material g It was 147.2 ° C.

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Abstract

The invention discloses a preparation method and an unfolding and recovering method of a thin-wall cylindrical shell structure, belongs to the technical field of spatial structure material design, and aims to solve the problem that the material application is limited due to the fact that most of existing thin-wall cylindrical shell materials are of one-way unfolding structures. The method comprises the steps that fiber cloth serves as a reinforcing material, a shape memory material serves as a resin matrix, and a shape memory composite material is prepared; after pre-curing at 60-120 DEG C for 0.5-6 h, a curled shape is prepared, then post-curing is performed on the curled shape, post-curing is completed after heating is performed at 120-200 DEG C for 4-10 h, and shaping is performed; the obtained sample is heated to Tg or above, a tubular mold is used for shaping the sample, the temperature is reduced to Tg or below, and the temporary shape of the thin-wall cylindrical shell structure is obtained; at the moment, under the room temperature state, the material is curled, and the curled shape is shaped due to the fact that the designed thin-wall cylindrical shell structure has the bistable characteristic. The reversible change of the stretching structure is realized through combination of two unfolding modes.

Description

Technical field [0001] The present invention belongs to the field of space structural material design, and in particular, the present invention relates to a method of preparing a thin-walled column shell structure and an expanding recovery method. Background technique [0002] Restricted to emission volume and weight, etc., space-wide spatial structures such as starony antennas, solar sails, solar panels, and all types of stretching arms, light, high stiffness, can be expandable. The thin wall can be expanded, which is a class having a thin-walled feature, bent or curled storage, which can rely on the elastic energy or drive device that rely on itself, and the cross section is an arc shape, and there is a structure of a support stiffness and stabilizing configuration. . Since the thin wall can expand the column shell, it has the advantages of simple structure, high storage efficiency, and high expansion stiffness, and there is more applications in spatial structures. [0003] Wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/30B29C61/06C08L63/00C08K7/06C08L25/06C08L77/10
CPCB29C70/30B29C61/0608C08K7/06C08L25/06C08L2205/16C08L2201/12C08L63/00C08L77/10
Inventor 刘宇艳武超张东杰成中军谢志民林国昌樊志敏
Owner HARBIN INST OF TECH
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