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Static force/fatigue performance test method for single section of reinforced frame/beam

A test method and fatigue performance technology, which is applied in the field of aircraft design, can solve the problems of large number of test pieces and long cycle, and achieve the effects of simple test, reduced development cost, and reduced scale

Active Publication Date: 2014-09-24
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the field of aircraft design technology, there has been no proper method for static / fatigue test research on typical sections of reinforced frames and beams, and the installation of reinforced frames and beams on aircraft is often simulated with reference to the real structure of reinforced frames and beams , Fixing method, a large number of connecting fixtures are used for testing, so the number of test pieces is large, and the cycle of manufacturing and testing is long

Method used

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  • Static force/fatigue performance test method for single section of reinforced frame/beam
  • Static force/fatigue performance test method for single section of reinforced frame/beam
  • Static force/fatigue performance test method for single section of reinforced frame/beam

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Embodiment 1

[0026] 1. Reinforcement frame a is the main load-bearing structure to bear the landing load of the main landing gear. In order to improve the integrity and production efficiency of the reinforcement frame, it is proposed to use integral forgings. Since there is no centralized load-bearing joint on the reinforcement frame a, it is impossible to strengthen it separately The real structure of the integral forging of frame a is tested and studied. By analyzing the force of the reinforced frame a, the section between the axis of the lower lock beam and the axis of the 22 long truss, which is most stressed, is selected as the object of the test research. Static / fatigue properties can cover other sections.

[0027] 2. Design a four-point bending beam, which is made of large titanium alloy forgings. Four ribs are arranged on the web of the beam, which are respectively used as the support of the fixed point and the loading point. At the lower edge of the two ribs far away from the axis ...

Embodiment 2

[0033] 1. Reinforcement frame b is manufactured by argon arc welding of titanium alloy forgings. In order to improve the manufacturability of parts, electron beam welding is proposed to be used instead of argon arc welding. In order to compare the static force of two welding processes on reinforcement frame b / Influence of fatigue performance, two kinds of welding forms of four-point bending beam structure are designed, and the welding seam is selected at the symmetrical section of the four-point bending beam.

[0034] 2. Design two groups of four-point bending beam structures, which are made of titanium alloy forgings. Four ribs are arranged on the beam web, which are respectively used as the support of the fixed point and the loading point. The ribs are fixed to form a simple support, and the load is applied to the upper ribs of the two ribs that are closer to the axis of symmetry. The two sets of four-point bending beam structures adopt argon arc welding and electron beam w...

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Abstract

The invention belongs to the field of airplane design, and relates to a method suitable for testing typical sections of structures such as reinforced frames and beams. The method is characterized in that a four-point bent beam test piece capable of reflecting the single section characteristic of a reinforced frame / beam is designed to perform static force / fatigue test. The method has the advantages that the four-point bent beam test piece is taken as a structural test piece having typical reinforced frame / beam characteristics, the stress situation of the main section of the reinforced frame / beam is reflected, and test research is performed by using the stress situation, thereby remarkably reducing the scale of test, shortening the test period and reducing the research cost; the four-point bent beam test piece is particularly suitable for the test research of typical stress section of a reinforced frame / beam structure which does not have any centralized bearing joint and is mainly used for bearing bending load; comparison rest research of different materials or processes of the reinforced frame / beam can be performed conveniently; a simple four-point bent beam test fixture can be designed, four-point bent beam static force / fatigue test is performed on an ordinary tester, and test is simple and convenient.

Description

technical field [0001] The invention belongs to the field of aircraft design and relates to a method suitable for testing typical sections of reinforced frames, beams and other structures. Background technique [0002] In the field of aircraft design technology, there has been no proper method for static / fatigue test research on typical sections of reinforced frames and beams, and the installation of reinforced frames and beams on aircraft is often simulated with reference to the real structure of reinforced frames and beams , Fixing method, a large number of connecting fixtures are used for testing, so the number of test pieces is large, and the cycle of manufacturing and testing is long. Contents of the invention [0003] The purpose of the present invention is: to design a four-point bending beam test piece that can reflect the typical cross-sectional characteristics of the reinforced frame and beam, and install it on the testing machine through simple fixtures to carry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/00
Inventor 许平王奡杨旭
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA