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

Cranioplasty is the surgical repair of a bone defect in the skull that is left behind after a severe injury or previous operation. It is usually done to protect underlying brain tissue, reduce local pain and to improve the cranial vault aesthetics. Cranial prostheses can be made from different types of materials: autologous bone, titanium, ceramics...

By Denis Spahić, Hakija Bečulić

Contraction is a part of a wind tunnel that has the greatest impact on the air flow quality in the test section. The constriction ratio, the cross section shape, the length and wall shape are constructive parameters that influence the uniformity of the flow, the flow turbulence intensity, the flow rotation angularity, the appearance of the flow sep...

By Ernad Bešlagić

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

The paper presents the volume-of-fluid (VOF) method for interface capturing in free surface flows in OpenFOAM® software. The VOF-model utilises an algebraic compressive scheme to effectively shrink the transitional region between the liquid and the gaseous phase. The capabilities of the model are demonstrated by simulating two-dimensionalaxisym...

By Edin Berberović

The paper analyzes the behavior of the plastic container during the buckling, ie during the load effect on the containers. The analysis was experimentally performed on several different types of containers. The container material is polypropylene. Experimental determination of pressure force and corresponding deformation was performed in thelaborat...

By Damir Hodžić, Atif Hodžić, Fadil Islamović