This work presents the combined method for determination of mechanical characteristics of elastic balls filled with fluid by using compression test and appropriate analytical-numerical method. Ordinary playing balls, being modelled with the Mooney-Rivlinmaterial model, are used in the study. Results obtained by this combined numerical-experimental ...

By Aleksandar Karač, Muamer Kargić

This paper describes the application of international standards, recommendations and guides, as well as other input data, to determine the interval of recalibration of laboratory equipment in the laboratory for testing the product safety testing LIND in Zenica, Bosnia and Herzegovina. An example of a pressure sensor on a 4-axis device for measuring...

By Samir Lemeš, Amir Kubat, Senad Pašalić, Alma Bečirović, Murčo Obućina

While performing ordinary oil condition monitoring on industrial systems, we can often notice that hydraulic oil has changed its color. The source of the problem can be very difficult to locate and is often consequence of complex chemical processes in hydraulic oil. Finding the root cause of oil varnishing in hydraulic machine design and its operat...

By Vito Tič, Darko Lovrec

This paper presents the results of the activities of Kakanj cement Plant and the German organization GIZ carried out during the Project: „Coprocessing of municipal waste as alternative fuel in cement industry“ in period from June 2015. to June 2018. Partners in the project were:- Faculty of Mechanical Engineering Zenica (partner of Kaka...

By Almir Bajtarević, Amna Bajtarević, Fuad Hadžikadunić

Waste water is taken from the place of origin to the receiver with the prior treatment of sewage consisting of a set of pipes, canals and structures. Sewerage is done by domestic (sanitary) and industrial wastewater.Treatment (conditioning) of wastewater is a procedure for reducing pollutants to those quantities or concentrations by which purified ...

By Haris Mešić

Twin screw compressors are extensively used in applications which require pressures higher then allowable pressure in oil free compressors but would benefit from oil free operation such as food processing, pharmaceutical industry etc. The major limitation for achieving high pressures is due to prohibitively high temperature increase in oil free ope...

By Ahmed Kovačević, Sham Rane, Nikola Stošić, Graham Stupple

Hydraulic cylinder malfunctions are very common causes for the failure of the operation of the hydraulic system. Most common causes are in cylinder’s seal failure, whereby the error by replacing the seals can be relatively quickly eliminated. In the case of frequent occurrence of the same failure, the problem should be more carefully addresse...

By Darko Lovrec, Vito Tič

The basic objective of machine structure testing is to reduce the number of structures without satisfactory quality, which are either discarded as scrap or sent for additional machining. The non-destructive testing can detect surface and internal errors in structures, depending on the applied testing method, which enables total quality of the produ...

By Esad Bajramović, Kemal Dekanović, Emir Bajramović

The permanent theme at the machine trade fairs is Industry 4.0, and it is apparent that dramatic changes are taking place in the industry. Industry 4.0 will be a milestone when it comes to increasing production and efficiency. Within this vision comes the SOPHIA, IoT Biesse platform, which enables its clients access to a wide range of services for ...

By Alan Lisica

PowerPoint is a popular classroom tool to make simple presentations. Such presentations can be flat when creating interactive lessons for students to use while sitting in front of the computers. Using built-in scripting features, Visual Basic for Applications, the interactivity of PowerPoint can be extended to unlimited dimensions. This paper has t...

By Alma Žiga, Hermina Alajbegović