Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Composite airfoil-like sandwich structure and forming method thereof

A technology of sandwich structure and composite materials, which is applied to other household appliances, household appliances, household components, etc., to achieve the effects of improving strength and rigidity, ensuring compliance, and reducing deformation

Active Publication Date: 2021-12-17
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems existing in the application of the existing sandwich sandwich structure to composite airfoil products, the present invention provides a composite airfoil sandwich structure and its forming method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composite airfoil-like sandwich structure and forming method thereof
  • Composite airfoil-like sandwich structure and forming method thereof
  • Composite airfoil-like sandwich structure and forming method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Forming a composite material wing "sandwich" weight-reducing structure includes the following steps:

[0059] ①Set the density to 110kg / m 3 The Degussa PMI foam is tested for compressive strength, and the compressive strength of the foam is required to be not less than 1.9MPa at 130°C, and it can be used only after passing the test.

[0060] ②Machining the qualified foam figure 1 shape.

[0061] ③Put the foam in wing root zone Ⅰ according to figure 2 The shape of the foam is pre-cut into three pieces; after drying the machine-added foam in an oven at 130°C±5°C for 3 hours, use a hair dryer to clean the surface debris.

[0062] ④Apply a layer of J-47B glue evenly on the surface of the foam, let it dry for 20-30 minutes, and stick a layer of J-47A glue film.

[0063] ⑤Wrap each of the three pieces of pre-cut foam in wing root area Ⅰ with 4 layers of carbon fiber prepreg (T700 / 9368 prepreg), lay up [90 / 90 / 0 / 90], and then combine the three pieces of foam with Ⅱ ~ The ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a composite airfoil-like sandwich structure and a forming method thereof. The method is as follows: add the foam core material from the root of the wing to the tip of the wing to the foam core material of zones I, II, III and IV in increasing thickness; prepare the foam surface for bonding; pre-cut each piece of foam in zone I Cover 4 layers of prepreg, lay layers [90 / 90 / 0 / 90], and then combine with the foam core materials in Zones II~IV; Layer [90 / 0 / 90 / 90], and then cover 4 layers of prepreg on the whole of Zone I, Zone II and Zone III, and lay up [90 / 90 / 0 / 90]. Finally, Zone I, Zone II, Areas III and IV are covered with 4 layers of prepreg as a whole, and the layup is [90 / 0 / 90 / 90]; the foam is reinforced and cured. The invention makes the thickest side panels on both sides of the wing root and the thinnest side panels on the wing tip, which can improve the ability of the core material to resist compression and deformation, realize the weight reduction function, and meet the structural strength design requirements.

Description

technical field [0001] The invention belongs to the technical field of composite material forming, and in particular relates to a composite material airfoil-like sandwich structure and a forming method thereof. Background technique [0002] The composite material of the fuselage can greatly reduce the weight, increase the fuel capacity of the aircraft, and effectively improve the performance of the flight range and fuel economy. It has become the development direction of advanced structural materials for aerospace. [0003] The structural configuration design of composite materials is flexible and changeable, and the sandwich structure is also an important weight-reducing structural method. The sandwich structure is to attach thin panels with sufficient rigidity on both sides of a relatively thick core material. When this structure is subjected to a bending load, there is a certain distance between the upper and lower panels, and a larger proportion of the structure can be o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/22B29C70/34B29C70/46B29C70/54B29L31/30
CPCB29C70/228B29C70/345B29C70/462B29C70/54B29L2031/3085
Inventor 韩蕾龚文化袁一博卢山李丽英王国勇柳晓辉
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com