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Same-material model experimental design method for load transfer characteristic of aircraft thin-wall structure

A technology of thin-walled structure and material model, which is applied in the direction of aircraft component testing to save costs, reduce design risks, and shorten the test cycle and scale.

Active Publication Date: 2017-05-24
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When designing a static model test to verify the load-carrying characteristics of the structure, if the scaling ratio is large, the thickness of the thin-walled structure and the in-plane dimension adopt the same scaling ratio, and there will be insurmountable difficulties in the actual engineering manufacturing process

Method used

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  • Same-material model experimental design method for load transfer characteristic of aircraft thin-wall structure
  • Same-material model experimental design method for load transfer characteristic of aircraft thin-wall structure
  • Same-material model experimental design method for load transfer characteristic of aircraft thin-wall structure

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Embodiment Construction

[0025] Take the model test design of the load transfer characteristics of an aircraft structure as an example. The overall size and structure position are reduced to 1 / 5 of the original, and the structure thickness is reduced to 1 / 2 of the original. The model test design is carried out as follows:

[0026] (1) Select the scaling ratio of the model test to ensure that the thin-walled structure is in a plane stress state,

[0027] Dimensions L 原型 / L 模型 =C L =5

[0028] Structure station coordinates x 原型 / x 摸型 =y 原型 / y 摸型 =z 原型 / z 摸型 =C L =5

[0029] Structure thickness L 原型 / L 模型 =C t = 2

[0030] (2) Choose the same material

[0031] Elastic modulus: C E =E 原型 / E 横型 = 1 Poisson's ratio: C μ =μ 原型 / μ 横型 = 1

[0032] (3) Set the similarity ratio of other physical quantities (only limited to in-plane displacement, stress, and strain components)

[0033] Stress similarity ratio: C σ = σ 原型 / σ 模型

[0034] Strain similarity ratio: C ε =ε 原型 / ε 模型

[0...

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Abstract

The invention belongs to the technical field of structure / strength experiments and relates to a same-material model experimental design method for the load transfer characteristic of an aircraft thin-wall structure. By adoption of the same-material model experimental design method for the load transfer characteristic of the aircraft thin-wall structure, the scaling of the structure thickness can be adjusted to eliminate difficulties in engineering manufacture when it is ensured that the structure is within a plane stress state range; and the experiment period can be exponentially shortened through model experiments, the experiment scale can be exponentially decreased through the model experiments, the cost is saved, and the design risk of an aircraft in a project demonstration stage is lowered.

Description

technical field [0001] The invention belongs to the technical field of structure / strength tests, and relates to a design method for a model test of the load-carrying characteristics and materials of an aircraft thin-walled structure. Background technique [0002] For a specific aircraft structure design scheme, static model tests are required to accurately and quickly evaluate the structural efficiency and verify the numerical analysis results. All external loads borne by thin-walled aircraft structures are mainly balanced by in-plane loads. For example, the tension and compression of the upper and lower walls and the shearing of the beam web jointly resist the bending of the wing, and the shearing of the skin, rib web, and beam web Resists twisting of the wing. [0003] When designing a static model test to verify the load-carrying characteristics of a structure, if the scaling ratio is large, the thickness of the thin-walled structure and the in-plane dimension adopt the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64F5/60
Inventor 柴慧赵占文李健张磊任善
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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