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Method for detecting working stress based on blind hole method

A technology of working stress and blind hole method, which is applied in the direction of measuring force components, measuring devices, testing of mechanical parts, etc., can solve the problems of low measurement accuracy, achieve the effect of improving detection accuracy and reducing costs

Pending Publication Date: 2020-12-04
CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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Problems solved by technology

[0010] In order to improve the problem of low measurement accuracy existing in the existing method of using the blind hole method to detect the working stress in the related art, this application provides a method for detecting the working stress based on the blind hole method

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  • Method for detecting working stress based on blind hole method
  • Method for detecting working stress based on blind hole method
  • Method for detecting working stress based on blind hole method

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Embodiment Construction

[0059] The following is attached Figure 1-3 The application is described in further detail.

[0060] The embodiment of the present application discloses a method for detecting working stress based on the blind hole method, which includes the following steps:

[0061] S1: establish the mathematical relationship between the strain release coefficient and the release strain, and calculate the theoretical value of the strain release coefficient by the finite element method;

[0062] S2: Drill a blind hole on the surface of the component under test and measure the first release strain;

[0063] S3: Carry out plastic strain correction at the edge of the hole to the strain relief coefficient, and obtain the first release correction strain relief coefficient;

[0064] S4: Carrying out drilling processing strain correction to the strain relief coefficient to obtain a second revised strain relief coefficient;

[0065] S5: Calculate the working stress according to the stress conditio...

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Abstract

The invention relates to a method for detecting working stress based on a blind hole method, and belongs to the technical field of stress detection, and the method comprises the following steps: building a mathematic relationship between a strain release coefficient and release strain, and calculating a theoretical value of the strain release coefficient through a finite element method; drilling ablind hole in the surface of the measured component and measuring a first release strain; correcting hole edge plastic strains of the strain release coefficient to obtain a first corrected strain release coefficient; correcting drilling strain of the strain release coefficient to obtain a second corrected strain release coefficient; and calculating the working stress according to the stress condition and the loaded condition of the measured component. The method for detecting the working stress based on the blind hole method provided by the invention has the advantages of high detection efficiency and high precision.

Description

technical field [0001] The present application relates to the technical field of stress detection, in particular to a method for detecting working stress based on a blind hole method. Background technique [0002] The blind hole method is a commonly used stress detection method, which has the characteristics of little damage to the workpiece, no influence on the performance of the workpiece, simple and easy to implement, and is currently widely used in the measurement of working stress in engineering. [0003] The principle of the blind hole method is to paste a plane three-way strain rosette on the measurement part of the workpiece surface, and then drill a small hole with a diameter and depth of about 2mm, which will cause the surrounding stress field to change, and measure the release strain in three directions before and after the hole. , the stress of the measured part can be calculated according to the following formula: [0004] [0005] [0006] [0007] wh...

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Application Information

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IPC IPC(8): G06F30/23G06F30/17G01L5/16G01M13/00G01B21/32G06F119/14
CPCG06F30/23G06F30/17G01L5/16G01M13/00G01B21/32G06F2119/14
Inventor 郑云逯鹏陈煊赵寒川王天奇李亮赵松涛
Owner CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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