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Stiffened plate structure axial compression stability test clamp and method

A technology of stability test and axial compression, applied in the direction of strength characteristics, measuring devices, instruments, etc., can solve the problems of complicated installation, increased test cost, high processing accuracy requirements, etc., to ensure effectiveness, save test costs, strong The effect of generality

Inactive Publication Date: 2013-09-11
空军工程大学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the existing test platform is not very versatile, and different types of loading support fixtures need to be used for different support conditions, and the installation is more complicated; and for test pieces of different structural sizes, it is necessary to provide The test piece is processed with its special fixture, which not only requires high processing accuracy, but also increases the test cost

Method used

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  • Stiffened plate structure axial compression stability test clamp and method
  • Stiffened plate structure axial compression stability test clamp and method
  • Stiffened plate structure axial compression stability test clamp and method

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Embodiment 1 Stiffened plate structure axial compression stability test fixture

[0042] refer to figure 1 A jig for testing axial compression stability of a stiffened plate structure includes: a semicircular ball seat 1, a semicircular ball head 2 movable in the semicircular ball seat 1, a loading platform and a slot for fixing the end of the test piece, and The stopper that fixes the position of the card slot. During the test, the symmetry and uniformity of the load on the stiffened plate are mainly realized through the self-adaptive movement of the hemispherical head in the hemispherical seat. During installation, the centroid of the fixture is required to be coaxial with the loading center of the testing machine.

[0043] The semicircular ball seat 1 is fixed on the middle position of the lower loading plate 10 of the testing machine, and the lower loading plate 10 is connected with the loading actuator of the testing machine; Apply lubricating oil evenly and pla...

Embodiment 2

[0046] Embodiment 2 Determination and adjustment of test fixture end support coefficient

[0047] The method for determining and adjusting the support coefficient of the loading end applicable to this test fixture includes the following steps:

[0048] Step (a): Take a rectangular flat plate with the same length, width, thickness and material properties as the skin of the stiffened plate test piece 12, and symmetrically place it on both sides of the flat plate along the length direction of 1 / 4, 1 / 2, and 3 / 4 The positions are respectively pasted with 13 resistive strain single pieces and 5 pieces each, such as image 3 .

[0049] Step (b): Place the plate in the test fixture of Example 1, place the upper and lower ends of the plate in the upper slot 4 and the lower slot 6 of the fixture respectively, so that the centroid of the flat plate is consistent with the loading center of the testing machine and the centroid of the test fixture Coaxial; to simulate the clamping section...

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Abstract

The invention discloses a stiffened plate structure axial compression stability test clamp and method, and the stiffened plate structure axial direction compression stability test clamp comprises a semicircle ball seat (1) and a semicircle bulb (2) which can be moved in the semicircle ball seat (1); the semicircle ball seat (1) is fixed in the middle of the lower loading plate (10) of the testing machine, and the lower loading plate (10) is connected to a loading actuated cylinder of the testing machine; the inner part of the semicircle ball seat (1) is uniformly smeared with lubricating oil, and the semicircle bulb (2) is uniformly smeared with lubricating oil and is placed in the semicircle tee (1), and the semicircle bulb (2) can be moved in the semicircle tee (1) when bearing compressive load; an end portion support coefficient determination and adjusting method provided by the invention is used, and can effectively determine and adjust the end portion support state during the stiffened plate axle load stability test, and provide basis for the test analysis.

Description

technical field [0001] The invention belongs to the testing technology of aircraft structure strength, and relates to a jig for testing axial compression stability of a stiffened plate structure and a method for measuring and adjusting the supporting coefficient of a loading end. Background technique [0002] The stiffened plate structure is a structure widely used in engineering. It can greatly increase the load-carrying capacity of plate parts with a small amount of weight, so it has the characteristics of light weight and high structural efficiency. It is a large number of modern aviation, aerospace and navigation fields The structure used. When this type of structure is subjected to loads such as in-plane compression, shear, bending, and torsion, the common failure mode is loss of stability (referred to as "buckling" or "buckling"). In fact, this type of structure does not fail after buckling, and still has load-bearing capacity, that is, post-buckling load-bearing capa...

Claims

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Application Information

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IPC IPC(8): G01N3/04
Inventor 何宇廷邵青崔荣洪安涛伍黎明张腾
Owner 空军工程大学
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