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Residual stress prediction method, device, server and storage medium

A technology of residual stress and prediction method, applied in the direction of measuring device, prediction, force/torque/work measuring instrument, etc., can solve the problem of inaccurate contour data and so on

Active Publication Date: 2019-12-03
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiment of the present invention provides a residual stress prediction method, device, server and storage medium, so as to solve the problem of inaccurate contour data obtained by measurement, and can also be aimed at Batch calculation of residual stress distribution of specimens with the same geometry

Method used

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  • Residual stress prediction method, device, server and storage medium
  • Residual stress prediction method, device, server and storage medium
  • Residual stress prediction method, device, server and storage medium

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Embodiment 1

[0089] Embodiment 1 of the present invention provides a method for predicting residual stress. The method is aimed at the measured deformation profile obtained after cutting a test piece containing residual stress using a profile method. The test piece that the present invention adopts is compact tensile test piece, and its shape is as Figure 1a As shown, the cutting surface is at position 110 in the figure, Figure 1b , 1c are the left view and the front view of the compact tensile specimen, respectively, the unit of length is mm, Figure 1d Schematic diagram of the cut compact tensile specimen. It can be understood that the test piece in the embodiment of the present invention may also be another type of test piece, which is not limited in the present invention. After cutting, measure based on the cutting surface of the specimen, such as Figure 1e As shown, the cutting starting position of the measuring cutting surface is the notch end 120 of the test piece, the measuri...

Embodiment 2

[0146] The residual stress prediction device 800 provided in Embodiment 2 of the present invention can execute the residual stress prediction method provided in any embodiment of the present invention, and has corresponding functional modules and beneficial effects for executing the method. The device can be composed of software and / or hardware (integrated circuit) and can generally be integrated into a server or terminal device. Figure 8 It is a schematic structural diagram of a residual stress prediction device 800 in Embodiment 2 of the present invention. refer to Figure 8 , the residual stress prediction device 800 in the embodiment of the present invention may specifically include:

[0147] The construction unit 810 is used to construct a stress function, wherein the independent variable of the stress function is the distance between the measurement point and the notch end of the test piece, and the dependent variable is the residual stress of the measurement point;

...

Embodiment 3

[0203] Figure 9 A schematic structural diagram of a device / terminal / server provided in Embodiment 3 of the present invention, such as Figure 9 As shown, the device / terminal / server includes a processor 910, a memory 920, an input device 930, and an output device 940; the number of processors 910 in the device / terminal / server may be one or more, Figure 9 Take a processor 910 as an example; the processor 910, memory 920, input device 930 and output device 940 in the device / terminal / server can be connected by bus or other methods, Figure 9 Take connection via bus as an example.

[0204] The memory 920, as a computer-readable storage medium, can be used to store software programs, computer-executable programs and modules, such as program instructions / modules corresponding to the subject update method in the embodiment of the present invention (for example, the residual stress prediction device 800 construction unit 810, extension unit 820, expansion unit 830, calculation unit...

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Abstract

The embodiment of the invention discloses a residual stress prediction method, a residual stress prediction device, a server and a storage medium. The method comprises the following steps: constructing a stress function; symmetrically extending the stress function to construct a periodic function; expanding the periodic function by using a group of preset-order trigonometric series; respectively calculating a first deformation profile of the cutting surface by taking each order of trigonometric series as a residual stress value; fitting the first deformation profile with a second deformation profile obtained by experimental measurement to determine a coefficient corresponding to each triangular series; confirming the expression of the stress function according to the coefficient corresponding to each order of trigonometric series; and calculating by taking the distance between the point to be measured and the notch end of the test part as the input value of the stress function so as topredict the residual stress of the point to be measured. According to the technical scheme provided by the embodiment of the invention, the problem of inaccurate profile data obtained by measurementis solved. The batch calculation can be realized for residual stress distribution of test parts with the same geometrical shape.

Description

technical field [0001] The embodiments of the present invention relate to the field of residual stress detection, and in particular to a residual stress prediction method, device, server and storage medium. Background technique [0002] The contour method is a destructive residual stress measurement method that obtains the residual stress distribution by measuring the displacement caused by the stress release. This method can obtain the residual stress value of each point on the surface to be measured and draw a two-dimensional residual stress distribution map . The basic principle is: when an object containing residual stress is cut in half, deformation caused by stress release will occur on the newly generated surface. Assuming that the stress release process is elastic and no new deformation is artificially introduced, this The magnitude of the force used by the deformation force to press back to the initial plane state is the magnitude of the initial residual stress. ...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06F17/15G06F17/14G06F17/12G06Q10/04G01L5/00
CPCG06F17/15G06F17/12G06F17/14G06Q10/04G01L5/0047
Inventor 孙浩程李东风
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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