Stationary fixture used for axial compression stability test of columnar bent plate

A technology for stability testing and fixture fixing, applied in the directions of strength characteristics, measuring devices, instruments, etc., can solve the problems of difficult control of the curvature radius of cylindrical curved plates, assembly of specimens and fixtures, and unadjustable round cake chucks. Solve the problem of assembly and neutral adjustment, increase the adjustment margin, and achieve the effect of accurate boundary conditions

Active Publication Date: 2013-04-03
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Due to the springback phenomenon, the curvature radius of the cylindrical curved plate is difficult to control during forming, and there is a tolerance with the design size
Improper design will not only easily cause assembly problems between the specimen and the fixture, but also easily make the fixture not have enough adjustment margin to complete the neutral adjustment of the specimen
[0003] After searching the existing technology, it was found that the circularly reinforced cylindrical curved plate test published in the third issue of "Mechanics Progress" in 1976 recorded a fixture, which was mainly composed of Z-shaped casting blocks, V-shaped groove blocks and screws. Co

Method used

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  • Stationary fixture used for axial compression stability test of columnar bent plate
  • Stationary fixture used for axial compression stability test of columnar bent plate

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Example Embodiment

[0027] Example 1

[0028] Such as figure 1 with figure 2 As shown, this embodiment includes: a lower pressing plate 1, two L-shaped uprights 2 and several pairs of chucks 3, wherein: the horizontal planes of the two L-shaped uprights 2 are respectively fixed on the lower pressing plate 1 and located on the curved plate 4 to be tested At the straight edges at both ends, a number of pairs of chucks 3 are fixed in sections along the straight edges of the two ends of the curved plate 4 to be measured on the vertical surface, so that the straight edges of the two ends of the curved plate 4 to be measured are clamped on both sides The middle of chuck 3.

[0029] Fixing several pairs of chucks 3 in sections can overcome possible manufacturing errors, such as warpage, of the curved plate 4 to be tested.

[0030] A plurality of pairs of first position adjustment holes 5 are opened on the vertical surface of the L-shaped column 2, and each chuck 3 is respectively fixed by the first connecti...

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Abstract

The invention discloses a stationary fixture used for an axial compression stability test of a columnar bent plate. The stationary fixture comprises a down press plate, two L-shaped upright posts and multiple pairs of collets, wherein horizontal surfaces of the two L-shaped upright posts are respectively fixed on the down press plate and are located at the straight sides of two ends of a to-be-tested bent plate, and the multiple pairs of collets are fixed on the vertical surfaces in a segmental manner respectively along the straight sides of the two ends of the to-be-tested bent plate, so that the straight sides of the two end parts of the to-be-tested bent plate are clamped between the collets at two sides. The stationary fixture used for the axial compression stability test of the columnar bent plate, disclosed by the invention, has a simple structure and is suitable for testing bent plates with multiple curvatures as the clamping positions of the L-shaped upright posts and the collets are adjustable.

Description

technical field [0001] The invention relates to an auxiliary device for testing mechanical properties, in particular to a fixing fixture for the axial pressure stability test of a cylindrical curved plate. Background technique [0002] As a thin-walled structure with strong bending and torsion resistance, cylindrical curved plate is widely used in various industrial fields. The safety problems caused by this kind of structural instability have always been the subject of people's attention and research. In order to avoid the simulation of boundary conditions, cylinders can be used to study the buckling performance of cylindrical curved plates. Although this method does not need to consider the design of straight-edge fixtures, it is easy to cause waste of test materials, especially for expensive advanced materials; and When the curvature radius of the test piece is large, the testing machine may not have enough test space to complete the test. The simply supported boundary ...

Claims

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Application Information

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IPC IPC(8): G01N3/04
Inventor 孙璐妍余音汪海
Owner SHANGHAI JIAO TONG UNIV
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