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Small punch testing system based on acoustic emission sensor and testing method thereof

A technology of acoustic emission sensor and test system, which is applied in material analysis using acoustic emission technology, and testing material strength and instrument using stable tension/pressure, which can solve the problem that the deformation of the sample sheet cannot be reflected in real time, and the test data is unreliable. , There is no specific device to monitor the problem of sample flakes, etc.

Inactive Publication Date: 2018-10-23
THE UNIV OF NOTTINGHAM NINGBO CHINA
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  • Abstract
  • Description
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Problems solved by technology

[0003] (1) Measuring the displacement of the punch is not accurate enough to reflect the deformation of the sample sheet in real time
[0004] (2) There is no specific device to monitor the crack of the sample sheet, resulting in the image obtained by the test is not the real fracture of the sample sheet, so that the test data is unreliable and the result is not accurate enough

Method used

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  • Small punch testing system based on acoustic emission sensor and testing method thereof
  • Small punch testing system based on acoustic emission sensor and testing method thereof
  • Small punch testing system based on acoustic emission sensor and testing method thereof

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Experimental program
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Embodiment

[0021] Embodiment: The loading system mainly includes a load sensor 1 , a punch 2 , a linear variable differential transformer 3 , and a cylindrical connecting rod 4 . The load sensor 1 is used to control the magnitude of the force sensed by the punch, and the load sensor is connected to the cantilever beam 15 in a hydraulic load control manner, which can control both the magnitude of the load and the punching speed. Two linear variable differential transformers 3 are directly connected to the punch 2, and the movement of the punch 2 drives the movement of the linear variable differential transformer 3, which is used to measure the displacement distance of the punch to characterize the deformation of the sample sheet. A cylindrical link 4 connects the load cell 1 to the punch 2 . The clamping device mainly includes an upper nut 5, a chuck 6, a pin 7 and a sample support table 8. In order to avoid oxidation of the punch and the clamping device, they are all made of high-tempera...

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Abstract

The invention discloses a small punch testing system based on an acoustic emission sensor and a testing method thereof. The small punch testing system comprises a loading system, a clamping device, asound-emission sensing system, a suspension girder arm, and a smelting furnace. The system has the characteristics of high accuracy, compact structure, flexible installation and dismounting, corrosionresistance, high bearing performance, and long service life and the like.

Description

technical field [0001] The invention relates to the technical field of detecting and evaluating micro samples, in particular to a small punch test system based on an acoustic emission sensor and a test method thereof. Background technique [0002] The small punch test technology has the dual advantages of almost non-destructive and convenient sampling. It has been applied to occasions where conventional mechanical experiments cannot be performed due to sampling and sample preparation restrictions. The yield strength and elastic modulus of materials are tested with miniature small punch samples. The mechanical properties such as volume and plasticity have high engineering application value. According to the experimental curve, the important data such as the maximum load, maximum displacement and small punch energy of the small punch test are obtained, and various mechanical performance parameters of the material are analyzed and obtained. At this stage, the small punch test ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N29/14
CPCG01N3/08G01N29/14G01N2291/0237
Inventor 陈浩李昕
Owner THE UNIV OF NOTTINGHAM NINGBO CHINA
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