Vol. 12 3, 2022 p 224 - 229


Article name, authors, abstract and keyword


Evaluation of the pipeline stress-strain state in the dent area under bending load

Anatoly A. Ignatik a, axim . Shenets a

a Ukhta State Technical University, 13 Pervomayskaya Str., Ukhta, 169300, Russian Federation

DOI: 10.28999/2541-9595-2022-12-3-224-229

Abstract: The purpose of the work is to determine the stress fields of the pipe in the dent area under bending load. The object of research was a pipe with the following geometric characteristics: an outer diameter 325 mm, a nominal wall thickness 9 mm, a length 3 m; a pipe steel grade is 14є. There is a dent on the pipe in the area of the pipe top line. Geometric parameters of the dent: length 240 mm, width 148 mm, maximum depth 11.8 mm, relative depth 3.6 %. The review of literary sources on the topic of the article is carried out. Insufficient study of the stress-strain state of the pipe in the dent area by means of physical and full-scale experiments using strain gauges and with a detailed determination of stress and strain fields was found. In the experimental part of the work a bending load in the vertical plane acted on a pipe with a dent. Using electrical resistor strain gauges measurements of hoop, longitudinal strains and strains at an angle of 45 degrees to the pipe axis in the nodes of the coordinate grid applied in the defect area were carried out. The fields of hoop and longitudinal stresses, as well as equivalent stresses, presented in tabular form, in the area of the dent when exposed to the pipe by a bending load are obtained. The most loaded point in the area of the dent, which is located in the zone of the greatest depth of the defect, is determined.

Keywords: dent, bending load, equivalent stress, hoop stresses, longitudinal stress, stress-strain state, laboratory stand

For citation:
Ignatik A. A., Shenets . . Evaluation of the pipeline stress-strain state in the dent area under bending load. Science & Technologies: Oil and Oil Products Pipeline Transportation. 2022;12(3):224229. https://doi.org/10.28999/2541-9595-2022-12-3-224-229

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