Sheet adhering method for detecting bending residual stress

A residual stress and patch technology, applied in the field of inspection, can solve the problems of no relevant reports and no standard for H-beam residual stress test, and achieve the effect of being suitable for large-scale promotion and use.

Inactive Publication Date: 2016-12-14
INNER MONGOLIA BAOTOU STEEL UNION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] There is no standard for the residual stress test of H-shaped steel. A

Method used

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  • Sheet adhering method for detecting bending residual stress

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Embodiment Construction

[0022] In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings of the present invention. Based on the embodiments in this application, those of ordinary skill in the art will Other similar embodiments obtained without creative work shall all fall within the scope of protection of this application.

[0023] A patch method for detecting bending residual stress, comprising the following steps:

[0024] Step 1: Select the patch position for detecting the workpiece, and paste the strain gauge 3 on the patch position;

[0025] Such as figure 1 Shown is a schematic diagram of the position of the H-shaped steel patch in the present invention.

[0026] Factors affecting the test results mainly include: the selection of the strain gauge 3 , the placement of the patch, and the degree of tightness bet...

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Abstract

The invention discloses a sheet adhering method for detecting bending residual stress. The sheet adhering method comprises steps of choosing a sheet adhering position for a detection workpiece, adhering a strain gage on a sheet adhering position, fixing a detection workpiece on a press machine, connecting the strain gage to a stress gauge through a lead, detecting and recording an original value, detecting and recording a stress value when the workpiece is bent, and taking the stress value as a bending stress value when the detection workpiece begins to deform. The sheet adhering method for detecting bending residual stress finds out an association relation between the stress value and the bending residual stress, and provides a method for finding out what magnitude of the stress value can cause deformation of H-shaped steel.

Description

technical field [0001] The invention relates to a detection method, in particular to a patch method for detecting bending residual stress. Background technique [0002] There is no standard for the residual stress test of H-shaped steel. As for how much residual stress can cause bending, there is no relevant report. And the bending yield strength cannot be measured on the current tensile testing machine, only the longitudinal yield strength can be tested, and the residual stress value can be estimated through the yield strength. Contents of the invention [0003] The technical problem solved by the present invention is to provide a patch method for detecting bending residual stress, and find out the correlation between the stress value and the bending residual stress. [0004] The technical solution is as follows: [0005] A patch method for detecting bending residual stress, comprising: [0006] Select the patch position to detect the workpiece, and paste the strain ga...

Claims

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Application Information

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IPC IPC(8): G01L5/00
CPCG01L5/0047
Inventor 李国王树林罗涛
Owner INNER MONGOLIA BAOTOU STEEL UNION
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