Method and system for measuring uniform elongation of pipeline steel

[0042] In this embodiment, a method for measuring the uniform elongation of pipeline steel, see figure 1 , the method includes the following steps:

[0043] S101. Obtain a sample of the pipeline steel plate to be tested;

[0044] S102. Perform a tensile test on the pipeline steel plate sample to obtain an engineering stress-strain curve;

[0045] S103. Obtain a set of data points in a preset interval from the engineering stress-strain curve; wherein, the starting point of the preset interval is the data point corresponding to a strain of 0.5%, and the end point is the strain value corresponding to the maximum stress value increased by 1 The data point corresponding to the -2% strain point;

[0046] S104. Fitting the set of data points to obtain a fitted stress-strain curve;

[0047] S105. Analyzing the formula corresponding to the fitted stress-strain curve to obtain the uniform elongation of the pipeline steel to be tested.

[0048] In the following, taking the measurement of

[0067] In this embodiment, a system for measuring the uniform elongation of pipeline steel, see figure 2 , the system includes:

[0068] The first obtaining module is used to obtain the steel plate sample of the pipeline to be tested;

[0069] The first obtaining module is used to perform a tensile test on the pipeline steel plate sample to obtain an engineering stress-strain curve;

[0070] The second acquisition module is used to acquire a set of data points in a preset interval from the engineering stress-strain curve; wherein, the starting point of the preset interval is the data point corresponding to a strain of 0.5%, and the end point is corresponding to the maximum stress value The strain value increases by 1-2% to the data point corresponding to the strain point;

[0071] The second obtaining module is used to fit the set of data points to obtain a fitted stress-strain curve;

[0072] The third obtaining module is configured to analyze the formula corresponding to th