Branko Tadic's research while affiliated with University of Kragujevac and other places

... Brzakovic et al. [9] presented theoretical and experimental analyses of the kinetic friction coefficient of a ball bearing under rotational motion initiated by dynamic impact force. A method and measuring system were developed to determine the value of the kinetic coefficient of friction by measuring the angular acceleration. ...

... For example, in Figure 5, there are cases (marked in red) when the measured value exceeds the values provided by the scale, particularly for workpieces fixed in a 3-jaw chuck with a piston diameter of 150 mm. This indicates the need for immediate intervention in the technological process [18]. In order to prevent such phenomena, shortcomings have been identified, and many recommendation measures have been developed to improve the accuracy of turning. ...

... The remaining personal profile answers reveal the ship's type and the ship's length overall on which participants sail ( Figure 4). The largest group of participants sailed on liquified natural gas (LNG) carriers (91), followed by cruisers (59), dry bulk carriers (27), container ships (22), tankers (13), and others (8). Participants, based on the length of the ship on which they serve, can be categorized into six groups: (i) 4.1% of respondents serve on ships from 100 to 150 m; (ii) 12.3% of respondents sail on ships from 150 m to 200 m; (iii) 17.3% of participants serve on ships from 200 m to 250 m; (iv) 46% of respondents represent the largest group, and they serve on ships from 250 m to 300 m; (v) 17.3% serve on ships from 300 m to 350 m; and (vi) last, the smallest group, 6%, are the navigators, who sail on the largest vessels, larger than 350 m. ...

... Following Euler's idea, several tribometers intended for the determination of kinetic friction coefficient were realised [23][24][25][26]. The published results indicate a great potential for this method in terms of an essential understanding of dynamic processes, friction phenomena, and a wide range of possible applications. ...

... The duration to break, which was observed, reflects the material's ductility and energy absorption capacity before failure. As noted by Kostic et al. [14], measurements of elastic modulus can be unreliable under low forces and minor elongations, potentially influencing these observations. Longer times to break typically suggest a more ductile material that can deform extensively before rupture. ...

... Still, the larger deviation from g at small angles might be attributed to effects stemming from the transition from static to kinetic friction, such as minuscule stick-slip motion [21]. To amplify the angle-dependent effects, a stainless steel object sliding on a stainless steel surface can be used [22]. ...

... Te validated results are under an acceptable percentage of error. Te optimal parameters predicted in DOM and TOPSIS optimization techniques are acceptable for performing the hard-turning operation on a hard steed to enhance better machinability results [39,40]. ...

... In the study [29], a mechanical model of cutting forces was developed by considering the trajectory of the cutting edge and the geometric error of the system. The practical prevalence of instantaneous models of tool cutting edge loads in industry limits the time-consuming determination of tangential and radial material coefficients [30]. Experimental determination of material coefficients for multi-layer metallic materials, where machinability varies from layer to layer, represents an additional challenge. ...

... The tensile force is transferred from the test specimen to the grips by friction forces acting on A-A surfaces. In cases of such transfer of load, significant compliance occurs in the contact zone between the grips and the specimen [41,42]. ...

... Approaches using LCA are often used to evaluate EE, as shown in the studies of [47][48][49][50]. Life cycle assessment of a product or service consists of a methodology that evaluates the environmental burdens associated with a product, process, or activity, identifying energy and materials used and waste released into the environment. ...