Double-propping head incubator for low-temperature CTOD (Crack Tip Opening Displacement) tests

A low-temperature chamber and testing technology, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., can solve the problems of high labor intensity of test personnel, difficult to guarantee test accuracy, and low test work efficiency, etc. Achieve the effect of reducing the demand for test equipment, simple and practical structure, and improving work efficiency

Active Publication Date: 2016-08-17
CNPC OFFSHORE ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when the low-temperature CTOD test is carried out under the current working mode and test conditions, there are problems such as low test work e...

Method used

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  • Double-propping head incubator for low-temperature CTOD (Crack Tip Opening Displacement) tests
  • Double-propping head incubator for low-temperature CTOD (Crack Tip Opening Displacement) tests
  • Double-propping head incubator for low-temperature CTOD (Crack Tip Opening Displacement) tests

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Embodiment Construction

[0024] see figure 1 , shows the double-head incubator for low-temperature CTOD test of the present invention. Taking the rotating double-head low-temperature box for low-temperature CTOD test designed on the Meters 1000KN electro-hydraulic universal testing machine as an example, the present invention is further described in detail.

[0025] The double-plug incubator for the low-temperature CTOD test includes a rotatable low-temperature box 1, an unstable and damaged plug 2, a crushed plug 3, a liquid discharge miniature ball valve 4, a limit screw 5, and a testing machine connecting plate 6. The rotatable low-temperature The box 1 is a box body with an upper end opening, and the box body can be in a suitable shape such as a rectangle or a square. The destabilizing and breaking plug 2 and the crushing plug 3 are arranged in the rotatable low-temperature box 1, and the liquid discharge miniature ball valve 4 is installed. On the side wall of the rotatable low-temperature box 1 ...

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Abstract

The invention discloses a double-propping head incubator for low-temperature CTOD (Crack Tip Opening Displacement) tests. The double-propping head incubator comprises a rotational low-temperature tank, a buckling failure propping head, a breaking propping head, a liquid discharge micro ball valve, limiting screws and a test machine connecting plate, wherein the rotational low-temperature tank is a tank body of which the upper end is opened; the buckling failure propping head and the breaking propping head are arranged inside the rotational low-temperature tank; the liquid discharge micro ball valve is mounted on a side wall of the rotational low-temperature tank; two sides of the rotational low-temperature tank are positioned by using the limiting screws; the test machine connecting plate is arranged at the bottom of the rotational low-temperature tank. Therefore, when low-temperature CTOD tests are implemented, rapid and accurate positioning of a double-point pressing head and two single-point propping heads can be achieved, so that two test steps of buckling failure loading and breaking of a test piece can be continuously completed by using one universal test machine, the working efficiency and the precision of tests are improved, and the working intensity of testers can be alleviated.

Description

technical field [0001] The invention relates to the technical field of mechanical performance tests of steel materials and welded joints, in particular to a double-head incubator for low-temperature CTOD tests used for low-temperature fracture performance evaluation tests of steel materials and welded joints. Background technique [0002] CTOD (Crack Tip Opening Displacement) test is an effective method to evaluate the fracture resistance of materials and welded joints, and it is a standard test method in many standards at home and abroad. In the process of CTOD test, the two test steps of specimen instability failure loading and rapid crushing loading must be carried out successively. ) head is subjected to three-point bending, and the instability failure and rapid crushing of the specimen are carried out successively. [0003] When carrying out the low temperature CTOD test, the instability failure and rapid pressure breaking of the specimen must be carried out at low tem...

Claims

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Application Information

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IPC IPC(8): G01N3/02G01N3/18
CPCG01N3/02G01N3/18
Inventor 李春润牛虎理张光华张田利王志坚孙勃胡艳华刘剑关幼耕
Owner CNPC OFFSHORE ENG
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