Bistable shell structure and manufacturing method thereof

A manufacturing method and bistable technology, which can be applied in the direction of slender elements, building elements, etc., can solve the problems of inability to improve the rigidity of the side bistable structure, increase the weight of the structure, and damage the shell.

Active Publication Date: 2017-09-12
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The greater the thickness of the material, the greater the energy storage of the material when the deformation is the same. However, if the wall thickness of the bistable shell is too large, the local deformation will be greater than the maximum failure deformation of the material when it transitions from the stretched state to the curled state , and lead to destruction of the shell
At the same time, the increase in wall thickness will significantly increase the weight of the structure
[0004] Therefore, it is impossible to increase the stiffness of the edge bistable structure by thickening the wall thickness of the shell structure, and increasing the local thickness of the shell structure will more efficiently improve the overall energy storage and overall stiffness of the structure

Method used

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  • Bistable shell structure and manufacturing method thereof
  • Bistable shell structure and manufacturing method thereof
  • Bistable shell structure and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Embodiment 1: Forming of the Rib Structure Taking molding as an example, a mold with a rib structure is processed. Using fiber prepreg as raw material, first cut the prepreg according to the designed size, then lay the outer layer into the mold, lay the material used for the rib along the rib structure, and then lay other materials layer by layer in the mold , and after the mold is molded according to the required temperature and pressure of the material.

Embodiment 2

[0069] Embodiment 2: Forming of the rib structure Taking pultrusion as an example, firstly, the cross-section in the direction of state 1 is used as the size to process the extrusion die head, which is mainly prepared by pultrusion equipment. If prepreg is used, under the action of external traction, the prepreg is preheated, sent into the mold cavity for heating and forming, and then cooled and shaped to form a finished product. If it is a dry yarn, it needs to be dipped in the preheating stage, and then shaped. The feature of this implementation method is that the 3 parts at the edge of the opening need to be thickened so that the shape can be fixed during the material forming process, and the thickened part can be regarded as a rib structure.

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PUM

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Abstract

The invention relates to a bistable shell structure and a manufacturing method of the bistable shell structure. The bistable shell structure comprises a shell body and rib structures. The rib structures are buried into the shell body or protrude from at least one surface of the shell body. The manufacturing method of the bistable shell structure comprises the steps of rib structure formation and shell body formation, wherein the step of rib structure formation comprises embedded material formation or pre-formation conducted through a mold. The rigidity, strength and morphological transformation efficiency of the bistable shell structure can be effectively improved. Besides, because of the locally arranged rib structures, the weight of the bistable shell structure cannot be greatly increased.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a bistable shell structure and a manufacturing method thereof. Background technique [0002] The bistable structure is mainly based on the shell structure, which refers to the states that can maintain stable bending deformation along the two directions along the surface of the shell structure at different times. Indication of two states figure 1 , the bistable structure can be stretched and continuously bent along the state 1 direction (ie, the stretching direction), and curled along the state 2 direction (ie, the winding direction), and both states can exist stably. The bistable structural shell can be rolled up into a tube, and when in state 2, the structure takes up very little space, making it very portable. When the bistable shell structure is in state 1, the structure can give full play to the axial strength, provide high-strength support and excellent bending...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16S3/00B29C70/34B29C70/52
CPCB29C70/34B29C70/521F16S3/00
Inventor 张辰威毕向军
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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