Vladimir Kocovic

• Doctor of Science - Mechanical Engineering
• Assistant professor at University of Kragujevac

Enterprise sustainability in the era of the fourth industrial revolution necessitates a novel approach involving intelligent technologies and a new role for leadership within sustainability structures, aligning with trends in emerging smart technologies and the Society 5.0 framework. This paper examines the critical role of smart parking in promoti...

In this research, evaluating and selecting design solutions for a small laboratory tensile testing device is stated as a multi-criteria, decision analysis problem, incorporating both quantitative and qualitative criteria. Fuzzy ratings of criteria values are provided by managers, students, and potential customers. Their assessments are described us...

The CNC dry turning of Inconel 625 alloy was investigated in this study. Turning was performed using different feeds, corner radii, and insert types. The dimensions and the arithmetic mean surface roughness were measured before and after turning. The influence of the input parameters and the process modelling were evaluated using a full factorial d...

Polypropylene is a widely used linear hydrocarbon polymer with diverse applications due to its exceptional physicochemical characteristics and minimal changes during the recycling process. Numerous studies have focused on factors influencing the mechanical properties of polypropylene and its application in composites. However, despite their signifi...

Steel has played an indispensable role in numerous industries, particularly in architecture, aerospace, and the automotive sector, and has been one of the most crucial components in manufacturing. The possibility of defects in the steelmaking process has had a substantial impact on the quality and service life of the final product. With the objecti...

Muzzle brakes have a significant effect on reducing the recoil force of weapons during firing. In this paper, muzzle brake as recoil compensator and recoil force for sniper rifle with and without muzzle brake are considered. The objective is to obtain the optimum inclination angle for the blades (side openings) of the muzzle brake in order to reduc...

Osteoarthritis (OA) is a degenerative disease of the knee joint caused by the formation of cracks within the collagen fibers of the articular cartilage. Current research is directed towards less invasive procedures for treating this degenerative disease using tissue engineering and 3D bioprinting. Therefore, it is crucial to obtain the exact shape...

This research includes longitudinal turning of Inconel 601 in a dry environment with PVD coated cutting inserts. Turning was performed for different levels of cutting speeds, feeds, depth of cuts and corner radius. After turning, the arithmetical mean surface roughness was measured. Mean arithmetic surface roughness values ranging from 0.156 μm to...

The paper presents a novel process of micro-cutting wherein the material removal is achieved by applying a constant penetration force of the cutting tool into the workpiece. Penetration force is achieved by a specially designed moving assembly comprising a tool and toolholder. Micro-cutting with constant cutting force is performed on conventional m...

The paper presents theoretical and experimental analyses of the kinetic friction coefficient of a ball bearing in conditions of rotational motion initiated by dynamic impact force. A method has been developed and a measurement system allows the measurement of a kinetic coefficient of friction through the measurement of the angular acceleration. Thi...

The paper investigates the effects of roller pressing on the hardness, roughness, and elastic modulus of wooden workpieces. For research purposes, a roller pressing device based on purely mechanical processing was designed and developed. Four different levels of pressing force have been applied to eight different types of wood: cherry, fir, alder,...

In general, the kinetic friction coefficient can, under any contact loading condition, be determined using methods completely different from the existing methods based on the measurements of contact load and friction force. The proposed method refers to the determination of kinetic friction coefficient using the dynamic equation of motion for a rot...

The paper presents the results related to the development of a modular didactic laboratory set for the experimental study of friction and its implementation in engineering education. Successfully implemented in laboratory exercises and research, the modular set has been upgraded over time. A newly developed module is presented for investigating the...

Using a "loop-the-loop" system, the authors developed a double-track apparatus and based their experimental research on theoretical foundations related to the motion on an inclined plane laid by Leonhard Euler. The method enabled the quantification of very small "energy losses". The paper presents the results of experimental research and the analys...

In recent years, modern industry has been paying great attention to the environmental aspects of processing that relate to the elimination of processes requiring cooling and lubricating agents, whenever possible. Used equipment for cooling and lubrication, according to modern legal regulations, must be stored and destroyed in an appropriate manner,...

In order to achieve a greater efficiency degree of electrical, mechanical or other assemblies that work by consuming any form of energy, the frictional force that occurs between all moving elements of the system should be minimized. Nowadays, a lot of standard sliding and rolling pairs have been developed, which provide linear movement. Since manuf...

Contemporary manufacturing companies secure their existence and conquering new markets through the full implementation of the product lifecycle management (PLM) systems. The so-called CAD/CAM/CAE systems (Computer Aided Design – CAD, Computer Aided Manufacturing – CAM, Computer Aided Engineering – CAE) play a fundamental part of these systems. Duri...

Presented in this work is a study on construction stiffness, based on examination of their neutral lines for various cross-section geometries and different force magnitudes. Investigations were conducted both through numerical simulations and experimentally. The results of numerical simulations indicate that stiffness enhancement reduces deflection...

Analyzed in this paper are barrier properties of wood specimens treated by ball burnishing. For the purpose of experimental investigation, special device was designed which allows continuous monitoring of the volume of water absorbed by specimen within particular time intervals. The device allows water pressurized at 3 bar to efficiently penetrate...

Numerous research results indicate that the finishing processing of metal materials using ball burnishing has positive effects from the aspect of surface roughness decrease to the hardness increase in the surface layers of the processed materials. Little research has been devoted to this type of processing for nonmetal materials. This paper present...

The paper theoretically and experimentally analyzes the influence of increased temperature and load contact in the value of the coefficient of rolling friction. Theoretical analyzes show that at temperatures of the order of 2000C, exist thermal potential necessary to narrow contact zone leads to a redistribution of the contact pressure and an incre...

Experimental investigations static coefficient of friction in lubricated conditions and pre-heating of the sample pin at high temperatures is discussed in this paper. The static coefficient of friction was measured in the sliding steel copper pins per cylinder of polyvinylchloride. Pins are previously heated in a special chamber from room temperatu...

Friction stir processing has extensive application in many technological operations. Application area of friction stir processing can be extended to the processing of non-metallic materials, such as wood. The paper examines the friction stir processing contact between a specially designed hard and temperature-resistant rotating tool and workpiece w...

The paper investigates ball burnishing of openings. A special high-stiffness tool was designed for the purpose of experimentation, allowing the burnishing of 40–120 mm openings. Experiments were performed with aluminium alloy EN AW-6082 (AlMgSi1). The primary goal was to achieve dimensional and geometrical accuracy of the openings. Using a speciall...