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

Method for determining distance between stringers of composite material stiffened wallboard structure

A technology of reinforced wall panels and composite materials, applied in the direction of instrument, geometric CAD, design optimization/simulation, etc., can solve the problems of low R&D iteration efficiency and long cycle, so as to shorten R&D time, reduce transportation costs, and reduce R&D expenses Effect

Pending Publication Date: 2022-06-17
NORTHEASTERN UNIV LIAONING
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method consumes a lot of manpower and material resources, and the development iteration efficiency is low and the cycle is long

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
  • Method for determining distance between stringers of composite material stiffened wallboard structure
  • Method for determining distance between stringers of composite material stiffened wallboard structure
  • Method for determining distance between stringers of composite material stiffened wallboard structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] The specific implementation process of the present invention will be described in detail below with reference to a specific design example of a composite reinforced wall panel of a CR929 aircraft. The specification of the composite material used is CMS_CP_306 unidirectional tape material. The skin and long stringers are made of this medium-mode high-strength carbon fiber toughened epoxy resin prepreg. The thickness of the single layer is 0.13mm, the Poisson's ratio is 0.31, and the compression The ultimate strain is 4500 με. The mechanical properties of the materials are shown in Table 2.

[0048] Table 2 Material parameters of carbon fiber unidirectional tape CMS-CP-306

[0049]

[0050] The stiffness matrix is ​​established according to the performance of the material itself. According to the stiffness matrix and the layering method of the girders and the skin, the elastic modulus of the upper and lower edge strips of the girders and the axial equivalent of the gi...

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

No PUM Login to View More

Abstract

The invention relates to a method for determining the distance between stringers of a composite stiffened wallboard structure, and belongs to the field of structural strength design of composite aircrafts. Comprising the following steps that S1, through stringer section parameters, expressions of the effective thickness tadj, the effective width weff and the effective cross section area Aeff of the stringer section are obtained; s2, calculating the equivalent elastic modulus Eeqv of the cross section of the stiffened wallboard; s3, establishing a constitutive equation of the bearing capacity of the composite material stiffened wallboard structure; s4, correcting the constitutive equation by adopting the effective cross sectional area and the shear modulus; and S5, determining the distance between the stringers of the composite material stiffened wall plate structure. According to the method disclosed by the invention, the optimal size configuration of the structure can be designed on the basis of meeting the structural strength requirement; the reduction of unnecessary conservative design is facilitated, the research and development time is greatly shortened, and the research and development cost is reduced; the time and economic cost brought by repeated tests is reduced, the structural design and the weight reduction capacity of the excavation structure are optimized, and the transportation cost is reduced.

Description

technical field [0001] The invention relates to a method for determining the spacing between long trusses of a composite material reinforced wall plate structure, and belongs to the field of structural strength design of a composite material body of an aircraft. [0002] technical background [0003] Composite material is a new type of material. Compared with traditional metal materials, it has the advantages of high specific strength, high specific stiffness, strong designability and excellent fatigue resistance. It has been widely used in aerospace, vehicles and ships, mechanical engineering. and other fields. Composite reinforced panel is a typical load-bearing structure in modern aircraft design. It has been widely used in aircraft wings, fuselage and tail, and its detailed design will have a great effect on reducing the weight of the structure and improving the bearing capacity of the structure. positive effect. The accurate analysis method of the truss spacing and sec...

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 Applications(China)
IPC IPC(8): G06F30/23G06F30/15G06F113/26
CPCG06F30/23G06F30/15G06F2113/26
Inventor 张修路李常有黄文超戴卫兵苗会会蔡兵
Owner NORTHEASTERN UNIV LIAONING
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