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Testing device and testing method capable of simulating pipeline blasting fracture morphology

A technology of blasting fracture and testing device, which is applied in the direction of measuring device, using one impact force to test the strength of materials, instruments, etc., to achieve the effect of good toughness and high strength

Active Publication Date: 2017-05-31
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0007] The purpose of the present invention is to provide a test device and a test method for simulating the fracture surface of pipeline blasting in view of the limitations of existing drop weight tear test devices and methods

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  • Testing device and testing method capable of simulating pipeline blasting fracture morphology
  • Testing device and testing method capable of simulating pipeline blasting fracture morphology
  • Testing device and testing method capable of simulating pipeline blasting fracture morphology

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Embodiment Construction

[0031] The present invention is described in further detail below in conjunction with accompanying drawing:

[0032] see figure 1 , the test device for simulating the fracture surface of pipeline blasting in the present invention includes a supporting device, a high-speed impact stretching device, a clamping device, a sliding bearing, a shock absorbing device 5, an ejection mechanism 6, a high-speed loading device 7, and a data acquisition system 8.

[0033] The support device is composed of an upper base plate 1-1, a lower base plate 1-2, and a support column 1-3. Both the upper base plate 1-1 and the lower base plate 1-2 are rectangular; the upper base plate 1-1 and the lower base plate 1-2 are connected by four circular support columns 1-3 with the same size and structure, and the support columns 1-3 are evenly distributed in the At the four corners of the upper base plate 1-1 and the lower base plate 1-2. Two bearing holes are symmetrically opened on the upper center lin...

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Abstract

The invention discloses a testing device and a testing method capable of simulating pipeline blasting fracture morphology. The testing device comprises a supporting device, a high-speed impact stretching device, a clamping device, a slide bearing, a damping device, an ejecting mechanism, a high-speed loading device and a data collecting system. A machining method is utilized to process a test material into a tensile sample with the length of 300mm and in a dumbbell shape, and a V-shaped notch is formed in the middle of one side of a parallel section of the test sample in the wall thickness direction. The testing device and the testing method have the advantages that the testing results of the testing device can truly reflect facture morphology of a practical engineering pipeline in blasting, the problem of test failure due to the fact that abnormal fracture completely different from entity blasting fraction morphology is generated by directly hammering the test sample in an original drop weight tear test is solved, can be effectively simulated mechanical response of pipelines in blasting / impact load and is beneficial to engineering application and engineering design of the materials.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technical field of material fracture toughness testing, and relates to a testing device and a testing method for simulating the fracture surface of pipeline blasting. [0003] 【Background technique】 [0004] Toughness is one of the important mechanical properties of metal materials and the basis for fracture control of metal components. For the fracture toughness test of steel pipes for oil and gas pipelines, Charpy impact test (CVN) and KIC, J integral, (CTOD) tests based on fracture mechanics are often used. These samples are small samples, and the thickness of the actual structural material is relatively different big. The full-thickness drop weight tear test (Drop-Weight Tear Tests on Line Pipe, DWTT) is a dynamic tear test, often by testing the fracture shear area of ​​metal materials to judge its fracture toughness. The principle is to drop a heavy hammer from a certain height, break a sample with a notch (V...

Claims

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Application Information

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IPC IPC(8): G01N3/30
CPCG01N3/30G01N2203/0017G01N2203/0067
Inventor 何小东张庶鑫仝珂梁明华蔺卫平宋广三张雪琴
Owner BC P INC CHINA NAT PETROLEUM CORP
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