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An analysis of random mechanical failures of bucket wheel excavator
(Institut za ispitivanje materijala, Beograd, 2015)
In this article random mechanical failures of bucket wheel excavator at open cast mine "Tamnava Zapad" are analysed. Random mechanical failures of mining equipment may represent an important factor in coal production because ...
Selecting hardfacing technologies for ventilation mill suction plates and extending its working life
(Institut za ispitivanje materijala, Beograd, 2015)
This paper presents results of the suction plate surface modification by hardfacing, of the ventilation mill in the Kostolac B power plant. Before applying hardfaced suction plates to exploitation conditions, it is necessary ...
Determining reliability functions of steam turbine in power plant 'Nikola Tesla, block a4'
(Institut za ispitivanje materijala, Beograd, 2016)
Determination of reliability indicators of steam turbine system in the thermal power plant 'Nikola Tesla, Block A4'during useful life period is based on a ten-year operational database. By implementation of mathematical ...
Risk analysis in the case of air storage tank failure at rhpp bajina basta
(Institut za ispitivanje materijala, Beograd, 2018)
The paper presents the risk analysis of an air tank failure at RHPP Bajina Basta. The applied procedure involves the determination of the risk matrix, i.e. the combined probability (frequency) of events and consequences ...
Tensile behaviour of polyethylene under different loading rates in the presence of imperfections
(Institut za ispitivanje materijala, Beograd, 2016)
This paper highlights the changes of polyethylene behaviour during various loading rates. The experimental programme was carried out on samples taken from PE80 polyethylene gas pipes with simulated imperfections with ...
Low-temperature corrosion damage and repair of boiler bottom panel tubes
(Institut za ispitivanje materijala, Beograd, 2017)
The method used for repairing of the bottom panel of hot water boiler of 30 MW power, manufactured by Remming (a part of the 'Valjevo' Heating Plant) is presented in this paper along with the reasons why damage has occurred. ...
Integrity assessment of regulation system pipeline elements in hydroelectric generating set a6 of hydro power plant 'djerdap 1'
(Institut za ispitivanje materijala, Beograd, 2016)
Vertical Kaplan turbines with nominal power of 176 MW manufactured in Russia are installed in 6 hydroelectric generating sets at hydro power plant 'Djerdap 1' (Kladovo, Serbia). Most of the components are made of materials ...
Numerical assessment of stress intensity factors at tips of multi-site cracks in unstiffened panel
(Institut za ispitivanje materijala, Beograd, 2017)
The aim of this paper is to establish and demonstrate diverse capacity and performances of different numerical methods for calculating stress intensity factors' (SIFs) histories versus crack length for problems involving ...
Thermal creep analysis of pressurized thick-walled cylindrical vessels
(Institut za ispitivanje materijala, Beograd, 2018)
Thermal stresses are calculated in thick-walled circular cylinder under internal and external pressure. The concept of transition theory and generalized strain measures is employed for the creep analysis of thick-walled ...
Assessment of integrity of pressure vessels for compressed air
(Institut za ispitivanje materijala, Beograd, 2021)
Fracture mechanics approach for structural integrity assessment is described in the case of pressure vessels for compressed air. The results of non-destructive testing indicated unacceptable defects on the vessels and set ...