Analytical expression for the strain coefficient A of a cylinder under external pressure
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Everyone: Has anyone read the article titled \"Formula for Calculating the Critical Strain Value A of External Pressure Cylinders Under Instability\" written by Mr. Xu from Sinopec Luoyang Research Institute? Is there a problem with the calculation using the formula in the text? I tried to calculate it; some results were quite accurate, while others had a large deviation Has anyone studied it?
Is no one involved? :'(:'(
Could you send me the results of your calculations? ckx169@126.com
A simple calculation done using Excel. . .
There is indeed a problem with Formula 3; I called President Xu, who said he no longer has those documents. However, the range covered by Formula 3 seems to be within the slanted segment.
For programming, using analytical expressions is the most convenient.
Then it’s better to use logarithmic interpolation properly: L
Interpolation is inaccurate in certain areas.
Why not use the GB150 formula?
GB150 does not have a formula for the B value. . . As long as an interpretation exists, it can only be used in the elastic deformation region; it cannot be applied beyond that region. The analytical formula is essentially a mathematical representation of the curve.