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Analysis of pipeline vibration
Jurij Avsec, Urška Novosel, 2019, izvirni znanstveni članek

Opis: Vibrations occur in almost all energy systems. This article presents an analysis of vibrations in pipelines under the influence of fluxes of displaced persons with a pressure difference or with the help of electromagnetic forces. For this purpose, we analysed pipelines of different diameters and the flow of crude oil within the pipelines.
Ključne besede: pipeline vibration, pipeline fluid flow, continuous vibration
Objavljeno v DKUM: 05.12.2023; Ogledov: 202; Prenosov: 6
.pdf Celotno besedilo (604,14 KB)
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Gender gap in Slovakia : selected problems of education and career
Katarína Danielová, Viliam Lauko, 2016, izvirni znanstveni članek

Opis: The article focuses on the gap between women education and their career. Women’s education has significantly increased in a few last years, but their position on the labour market has been more difficult in comparison with men. The share of economical active women and also the share of working women with higher education have been growing till the present time. However, it is questionable how do women use their higher education in career or whether they can build even some career. We have used the data from Statistical Office of the Slovak Republic and some problems have been presented in the area of Slovakia on the level of regions (kraje).
Ključne besede: gender gap, education, career, Slovakia, leaky pipeline
Objavljeno v DKUM: 17.04.2018; Ogledov: 1314; Prenosov: 114
.pdf Celotno besedilo (1,91 MB)
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Deformation and energy parameters of fracture of steel of the main gas pipeline
P. O. Maruščak, Sergey Panin, Ulyana Polyvana, Tomaž Vuherer, Anna Guzanová, Janette Brezinová, 2015, izvirni znanstveni članek

Opis: By example of steel 17G1S, the regularities in the impact fracture of Charpy specimens at normal and low temperatures are described. The relationship between the energy parameters of fracture (impact toughness) and the deformation response of the material (the height of shear lips) of the specimens from the pipe steel is established. The micromechanisms of impact fracture of the material are described. At 20 °C and –30 °C, focal splitting of the material was observed on the fracture surface of specimens; at –60 °C, the material failed in a brittle manner by the mechanism of cleavage.
Ključne besede: impact toughness, main gas pipeline, failure analysis
Objavljeno v DKUM: 08.08.2017; Ogledov: 1060; Prenosov: 373
.pdf Celotno besedilo (2,03 MB)
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Low temperature impact toughness of the main gas pipeline steel after long-term degradation
P. O. Maruščak, Irina Danyliuk, R.T. Biščak, Tomaž Vuherer, 2014, izvirni znanstveni članek

Opis: The correlation of microstructure, temperature and Charpy V-notch impact properties of a steel 17G1S pipeline steel was investigated in this study. Within the concept of physical mesomechanics, the dynamic failure of specimens is represented as a successive process of the loss of shear stability, which takes place at different structural/scale levels of the material. Characteristic stages are analyzed for various modes of failure, moreover, typical levels of loading and oscillation periods, etc. are determined. Relations between low temperature derived through this test, microstructures and Charpy (V-notch) toughness test results are also discussed in this paper.
Ključne besede: impact toughness, fracture, damage, gas pipeline, steel, degradation
Objavljeno v DKUM: 03.04.2017; Ogledov: 1389; Prenosov: 429
.pdf Celotno besedilo (699,32 KB)
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