Technical Diagnostics and Non-Destructive Testing #2, 2020, pp. 31-36
Analysis of semi-empirical equations for determination of stress concentration in volumetric damages on pipeline surface
P.S. Yukhymets1, L.J. Yurko1, S.V. Kobelsky2, V.I. Kravchenko2
E.O. Paton Electric Welding Institute of NASU, 11 Kazymyr Malevych, Kyiv, 03150. E-mail: email@example.com
G.S. Pisarenko Institute for Problems of Strength of NASU, 2 Timiriyazivs’ka str., Kyiv, 01014, Ukraine. E-mail: firstname.lastname@example.org
The paper deals with comparative analysis of some equations for calculation of stresses in a corrosion damage zone on pipeline
surface. Stresses calculated by FEA in the area of volumetric surface defects were used as the reference values. The geometric
parameters required for calculations were presented as a corresponding set of random independent values that varied within certain
limits. Optimal dependencies were determined, the application of which provides moderately conservative values and a relatively
narrow range of low values of stress concentration factor, when calculating the maximum stresses in the defects on the outer and
inner surfaces, respectively. Ref. 19, Tabl. 3, Fig. 5.
stress concentration, corrosion defects, pipelines
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