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A convenient residual stress measurement equipment and method

A technology of residual stress and measuring equipment, which is applied in the direction of measuring force, measuring devices, instruments, etc., can solve the problems of complex equipment and unsuitable residual stress measurement requirements of engineering sites, etc., and achieve the effect of simple operation and portable equipment

Inactive Publication Date: 2016-08-31
BEIHANG UNIV
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Problems solved by technology

However, the equipment of this kind of system and method is complicated, and it is not suitable for the residual stress measurement requirements of the engineering site

Method used

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  • A convenient residual stress measurement equipment and method
  • A convenient residual stress measurement equipment and method
  • A convenient residual stress measurement equipment and method

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Embodiment Construction

[0026] specific implementation plan

[0027] The residual stress measurement equipment and method provided by the present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] Such as Figure 2-Figure 5 As shown, the convenient and flexible residual stress measurement method provided by the present invention comprises the following steps in order:

[0029] 1) The metal test piece 1 is prepared, the metal test piece 1 is partially polished, and the metal test piece 1 is sprayed with white primer and black speckle in sequence.

[0030] 2) Install the component 3, fix the three magnetic brackets of the fixed platform 7 with the magnetic tripod bracket in the component 3 on the metal test piece 1, adjust the height of the three magnetic brackets and the CCD electron microscope 4, turn on the lighting fixture 8, So that the CCD electron microscope 4 can obtain a clear image, the lighting fixture 8 can be an LED lighting lamp.

[0031...

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Abstract

A convenient residual stress measurement device and method uses a two-dimensional digital speckle correlation method to perform correlation calculation on the speckle images of the plane specimen before and after the residual stress is released, and obtains the regional strain field before and after the release. The stress relief of the test piece can be realized by drilling device or impact indentation device. According to the theoretical formula of the residual stress of the drilling method or the impact indentation method, the residual stress of the test piece is calculated. The system can flexibly choose the method of stress release according to different needs, and has the advantages of high precision, non-contact, and convenient operation.

Description

technical field [0001] The invention relates to a small and convenient metal plate residual stress measuring device, which belongs to optical measurement experimental mechanics, engineering materials, residual stress measurement of drilling method and residual stress measurement of impact indentation method. technical background [0002] During the manufacturing process, the components will be affected and affected by factors such as various processes; when these factors disappear, if the above-mentioned effects and influences on the components cannot disappear completely, there will still be some effects and influences remaining on the components. Inside, this residual effect and influence is called residual stress or residual stress. Residual stress is the initial stress on the section of the component that has not been loaded yet. During the service process of the component, it is superimposed with the working stress caused by other loads, causing secondary deformation an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/00
Inventor 李晓星葛宇龙杨岩峰郑航
Owner BEIHANG UNIV
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