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Test piece pressurization device for three-dimensional photoelastic stress experiment

A pressurization device and photoelastic technology, applied in the field of specimen pressurization devices, can solve the problems of inconvenient movement, the inability of the pressurization device to display the loading force, and the inability of the oven to bear the weight of excessive weights, etc., to achieve large load values, The effect of prolonging the service life and accurately digitally displaying the load value

Active Publication Date: 2016-02-03
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. Generally, the load is applied by adding weights. The gravity of the weights is completely applied to the bottom of the oven. The oven cannot bear the weight of the heavy weights, which limits the increase of the load value and cannot achieve high stress loading.
[0006] 2. Pressure devices using other loading methods cannot display the magnitude of the loading force
[0007] 3. When carrying out stress freezing, it is necessary to put the entire pressurizing device into the oven, which is inconvenient to move

Method used

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  • Test piece pressurization device for three-dimensional photoelastic stress experiment
  • Test piece pressurization device for three-dimensional photoelastic stress experiment
  • Test piece pressurization device for three-dimensional photoelastic stress experiment

Examples

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Comparison scheme
Effect test

Embodiment 1

[0028] A specimen pressurizing device for three-dimensional photoelastic stress experiment. Such as figure 1 and figure 2 As shown, the specimen pressurization device for three-dimensional photoelastic stress experiment consists of three parts: loading device, pressure holding device and pressure measuring device.

[0029] Such as figure 1 and figure 2 As shown, the structure of the loading device is: a jack 2 is fixed at the middle position of the bottom plate 1, guide rods 16 are symmetrically fixed at four corners of the bottom plate 1, and ring-shaped bosses 21 are provided on the four guide rods 16 at equal heights; The four corners of 19 are fixed with sliding sleeves 20, and the four sliding sleeves 20 are looped on the corresponding guide rods 16. The sliding plate 19 is located on the annular boss 21. The height of the lower plane of the sliding plate 19 is 1.05 of the height of the initial position of the jack 2. ~1.10 times, the upper ends of the four guide ro...

Embodiment 2

[0037] A specimen pressurizing device for three-dimensional photoelastic stress experiment. Except following technical parameter, all the other are with embodiment 1:

[0038] The height of the lower plane of the slide plate 19 is 1.10 to 1.15 times the height at the initial position of the jack 2;

[0039] The die 17 is composed of two identical semi-cylinders, the outer walls of the four sides of the two semi-cylinders are respectively provided with ear plates 4, and the four sides are parallel to the axis of the semi-cylinders, and each ear plate 4 is symmetrically Screw holes are provided, and there are 4 screw holes. The bolt 5 connects the two half cylinders as a whole through the screw holes, and the wall thickness of the half cylinders is 35-50mm.

[0040] Compared with the prior art, this specific embodiment has the following positive effects:

[0041] In this specific embodiment, the radial constraint is provided to the test piece through the die 17 , and the axial...

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Abstract

The invention relates to a test piece pressurization device for a three-dimensional photoelastic stress experiment. According to the technical scheme, a jack (2) is fixedly arranged in the center of a bottom plate (1); the lower ends of three clamping screws (9) are correspondingly hinged with pins (18) in three U-shaped notches of a lower clamping plate (3); the upper ends of the three clamping screws (9) are correspondingly arranged in three U-shaped notches of an upper clamping plate (7); a lower locking nut (6) and an upper locking nut (8) are respectively arranged on the upper parts of the three clamping screws (9); a circular boss of the lower clamping plate (3) and a circular boss of the upper clamping plate (7) are correspondingly arranged in the lower part and upper part of a concave die (17); the pressure testing device consists of a pressure sensor (11), a pressure head (10), a signal amplifier (13), a data display instrument (12) and a signal cable (14). The test piece pressurization device disclosed by the invention has the characteristics that a load value is high, the load value can be accurately and digitally displayed, a test piece can be conveniently moved out and the load is kept invariable; and the device is applied to three-dimensional photoelastic stress experiment research.

Description

Technical field [0001] The present invention is the technical field of the test parts of the light elastic stress experiment.Specifically involves a test parts for three -dimensional light elastic stress experiments. Background technique [0002] Light elasticity is an experimental stress analysis method for research on elasticity in applied optical principles.The structural test parts made of a transparent material with a double refraction effect are placed in the polarized light field. When the load is applied to the test piece, you can see the interference stripes generated on the test parts.Through this interference stripes, you can accurately calculate the stress distribution of the test parts and the internal test of the test parts, so it is particularly suitable for the stress analysis of the complicated objects and structured objects. [0003] In actual work, some structures are in a two -dimensional stress state, or can be simplified into a two -dimensional stress state,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/02
Inventor 叶义成胡南燕涂福泉王琦琳胡洪旺赵祖炜岳哲姚囝
Owner WUHAN UNIV OF SCI & TECH
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