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Vol.21, No. 1-2 (2024)

Volume 21 Issue 1 2024

Publishing collaboration

info

Edited by:

Prof.dr. Fuad Hadžikadunić

Vol 21, No 1 (2024):

Mašinstvo

Published: 30.06.2024.

Current issue
30.06.2024. Professional pappers
NUMERICAL ANALYSIS OF STRESS STATE OF PRESSURE VESSEL

By Bahrija Čuturić, Ermin Bajramović, Fadil Islamović, Dženana Gačo

30.06.2024. Professional pappers
DYNAMIC ANALYSIS OF THE MIXER CONSTRUCTION FOR MIXING LIQUIDS INSIDE THE TANK

By Elma Ekinović, Amel Karić, Kenan Šabanović, Adnan Barlov

30.06.2024. Orginal scientific papers
INFLUENCE OF CUTTING PARAMETERS ON THE PROCESS OF STYROFOAM CNC CUTTER OPERATION USING EXPERIMENTAL-MATHEMATICAL MODELING

By Sabahudin Ekinović, Amila Mehić, Harun Hercegovac

30.06.2024. Professional pappers
WELDED JOINT BEHAVIOR DURING TENSILE TESTING AT DIFFERENT TEMPERATURES

By Belma Islamović Čavkić, Ermin Bajramović

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30.06.2024. Professional pappers
NUMERICAL ANALYSIS OF STRESS STATE OF PRESSURE VESSEL

By Bahrija Čuturić, Ermin Bajramović, Fadil Islamović, Dženana Gačo

Pressure vessels that are exposed to high stresses, due to unfavorable working conditions during exploitation, must be properly designed, taking into account all calculation factors, in order to be safe during their expected lifetime. Checking the condition of the vessel, or analyzing the load of the vessel in working and test conditions, is mandatory. In recent times, numerical analysis represents one of the most important methods of analyzing the stress states of all structural elements, including pressure vessels. It enables precise determination of the location of the greatest stresses and deformations. In this paper, a stress analysis of a vertical cylindrical pressure vessel type VS 110 with a spiral for heating and cooling, with a volume of 3750 liters and a working pressure of 3 bars, which is used for the preparation of medicines in the pharmaceutical
industry, was performed. The calculation of the vessel was made according to the EN 13445 standard and regulations on pressure vessels. Then a numerical stress analysis was performed in the Autodesk Inventor 2023 software package. The results of the numerical analysis show that the highest stresses occur in the torispherical parts of the vessel end. Furthermore, the cylindrical nozzles on the shell as well as on the torispherical ends act as a reinforcement of the vessel because there is a stress reduction in their vicinity.

30.06.2024. Professional pappers
DYNAMIC ANALYSIS OF THE MIXER CONSTRUCTION FOR MIXING LIQUIDS INSIDE THE TANK

By Elma Ekinović, Amel Karić, Kenan Šabanović, Adnan Barlov

31.12.2021. Professional pappers
CREATING A QUALITY NETWORK INFRASTRUCTURE FOR THE PURPOSE OF SUCCESSFUL BUSINESS

By Muharem Redžibašić

30.12.2022. Orginal scientific papers
MATHEMATICAL AND NUMERICAL ANALYSIS OF THE RELATIONSHIP AMONG THE LOSCHMIDT CONSTANT, THE AVOGADRO CONSTANT, AND THE SPEED OF SOUND IN IDEAL AND REAL GASES AT STANDARD STATE

By Nagib Neimarlija, Muhamed Bijedić, Nusret Imamović

In this paper, a differential equation is derived relating to the relationship among the Loschmidt constant, the Avogadro constant, and the speed of sound in gases as a function of the thermodynamic properties of the gas (pressure, temperature, and volume). To confirm the validity of the derived equation, the ratio of the constants NL/NA and the deviation of the NL/NA ratio for several ideal gases (hydrogen, helium, carbon monoxide,
nitrogen, oxygen, carbon dioxide, methane) were calculated using the ideal-gas equations of state (Pv=RT). The calculation of the ratio of the constants NL/NA and the deviation of the NL/NA ratio from the value for the gases at standard state (i.e., temperature 273.15 K and pressure 101325 Pa) is in a good agreement with the results published in literature, given the fact that the literature data of the NL/NA ratio is 0.04461498 at standard state. As the second step in confirming the validity of the derived equation, the ratio of the constants NL/NA and the deviation of the NL/NA ratio for several real gases (hydrogen, helium, carbon monoxide, nitrogen, oxygen, carbon dioxide, methane) were calculated using the real-gas Van der Waals equation of state. In this case, the calculation results are also in agreement with the reference value.

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