Reasons for crack nucleation in welded joints of main gas-pipelines after a long-term operation

International Conference on Mechanical Engineering, Automation and Control Systems 2016

机械制造;无线电电子学;计算机科学

Maruschak, P.O.^1 ; Bishchak, R.T.^2 ; Shlapak, L.S.^2 ; Panin, S.V.^3,4

Ternopil Ivan pul'Uj National Technical University, Ruska str., 56, Ternopil

46001, Ukraine^1

Ivano-Frankivsk National Technical University of Oil and Gas, 15 Karpatska str., Ivano-Frankivsk

76000, Ukraine^2

Institute of Strength Physics and Materials Science RAS, 2/4, Akademicheskii ave., Tomsk

634021, Russia^3

National Research Tomsk Polytechnic University, Lenin ave., 30, Tomsk

634050, Russia^4

关键词: Crack nucleation;    Micro-defects;    Micromechanisms;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/177/1/012114/pdf
DOI  :  10.1088/1757-899X/177/1/012114

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

A crack of operational origin in the welded joint of the main gas pipeline is analyzed. The reasons for its nucleation and impact on technological microdefects that were formed earlier during the welding are found. Micromechanisms and stages of nucleation and propagation of the crack are investigated.