Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Calculation method for bolt connection internal force in metal-composite mixed structure at variable temperatures

A hybrid structure and calculation method technology, applied in calculation, design optimization/simulation, special data processing applications, etc., can solve problems limited to engineering methods and low calculation accuracy, reduce structural weight, improve calculation and analysis accuracy, and ensure safety Effects of Sex and Reliability

Inactive Publication Date: 2017-10-20
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the evaluation and calculation of the connection internal force of this kind of metal-composite hybrid structure is limited to engineering methods, and the calculation accuracy is low. There is an urgent need for a method for the calculation of the connection internal force with higher accuracy.

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
  • Calculation method for bolt connection internal force in metal-composite mixed structure at variable temperatures
  • Calculation method for bolt connection internal force in metal-composite mixed structure at variable temperatures
  • Calculation method for bolt connection internal force in metal-composite mixed structure at variable temperatures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention.

[0033] Such as figure 1 Shown is the metal-composite hybrid structure under variable temperature in the present invention, the metal plate 1 and the composite material plate 2 are connected by bolts 3, due to the deformation coefficient or deformation of the metal plate 1 and the composite material plate 2 at different temperatures The amount is different, so it will cause the overall deformation of the metal and composite composite structure to be different.

[0034] Such as figure 2 with image 3 , which are schematic diagrams of the deformation of composite materials and metal structures with temperature changes, respectively. Compared figure 2 with image 3 It can be seen tha...

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 calculation method for bolt connection internal force in a metal-composite mixed structure at variable temperatures. The calculation method comprises the steps that 1, primary engineering analysis on the stress form is conducted; 2, material nonlinearity analysis on the metal-composite mixed structure is conducted; 3, contact nonlinearity analysis on the metal-composite mixed structure is conducted; 4, entity finite element mesh generation is conducted on the metal-composite mixed structure; 5, temperature loads are applied to the metal-composite mixed structure; and 6, static solution is conducted on the metal-composite mixed structure, bolt internal force under the temperature loads is obtained, and stress and strain values of a high stress area of the metal-composite mixed structure are determined. The method for determining and calculating the connection internal force of the metal-composite mixed structure is provided for the metal-composite mixed structure at different temperatures, the defects of a traditional experience method are overcome, and the calculation method is simple, convenient to operate and high in calculation precision.

Description

technical field [0001] The invention belongs to the technical field of aircraft structure design, and in particular relates to a method for calculating the internal force of a bolt connection in a mixed structure of metal and composite materials under variable temperatures. Background technique [0002] In order to reduce the weight of the aircraft structure, improve the specific strength, and ensure flight safety, modern aircraft widely use a hybrid structure of metal and composite materials, and the hybrid structure is connected by bolts. In the metal-composite hybrid structure, the thermal expansion coefficients of the metal and the composite material are inconsistent, resulting in inconsistent deformation of the metal-composite structure, so that the aircraft using the metal-composite hybrid structure generates connection internal forces at different operating temperatures, and the connection internal force acts For connecting bolts, this connecting load is an unfavorabl...

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): G06F17/50
CPCG06F30/15G06F30/23
Inventor 郑茂亮刘存
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
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