SCIDAR - A Digital Archive of the University of Kragujevac

This paper presents a comparative analysis of numerical simulations of blood flow through the left ventricle using SPH (LS-DYNA) and FVM (Ansys Fluent) solvers. Numerical simulations based on SPH and FVM methods can provide a more comprehensive understanding of cardiac blood flow patterns. In Fluent, left ventricle walls were modeled as boundary conditions with zero fluid velocity, while in the LS-DYNA software the walls were modeled with fixed particles. Boundary conditions were also prescri...

Traditional methods for analysing geotechnical structures typically rely on the deterministic approach, where the primary focus is on determining factor of safety (FoS) for structure. However, this approach may yield different failure probabilities despite similar values of safety factors due to conservative assumptions and unreliable initial data. This paper integrates reliability approach, finite element method (FEM), and machine learning (ML) to enhance safety assessments in geotechnical e...

When selecting a production technology of a massive and/or responsible machine part, all the important parameters, including material properties, its price and availability on the market, as well as own technological capabilities and procedure limitations, need to be considered. Knowing all these factors is of a great importance, due to their great influence on the produced parts’ final quality. The machine part, considered in this research, made of the Q+T (quenching + tempering) steel 4...

Road traffic accidents are identified as a significant societal issue based on extensive and comprehensive research in public health and traffic safety. Such incidents lead to significant negative outcomes, including human casualties, economic consequences, vehicle damage, and significant medical costs. Developing predictive models is crucial for identifying risk factors associated with accidents, thereby improving understanding of accident causes and enabling more effective prevention interv...

This paper presents a case study on the repair of oldtimer parts, with a particular focus on the damaged air duct that connects the heating and cooling system to the car's cabin. The replacement of such parts is challenging due to the cessation of production, making reverse engineering a feasible solution. Using the high-resolution and high-accuracy Artec SPIDER 3D scanner, the damaged part was digitized, followed by shape reconstruction and 3D CAD modeling processes. Furthermore, the model ...

Gear train optimization is a constant subject of research with the goals of its adequate and justified use. One of the more important segments of optimization is the criteria of gear train volume. This paper is oriented on the analysis of the problem of decreasing gear train volume from a gear shaft axis position aspect. A heuristic approach has been developed for positioning shaft axes along a golden spiral contour, and the methodology for this alternative solution of optimization problems w...

Composite materials are still not in widespread use in the industry due to their unexplored potential. One of the uses of composite materials can be in drive shafts. Using lightweight materials for propulsion components can potentially significantly decrease their weight in comparison to their metal counterparts, while maintaining performance characteristics. Drive shafts are subjected to torsion and in rare cases they are subjected to bending. This paper explores the angle of twist in case o...