Faculty of Mechanical Engineering
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Item type:Publication, Comfort analysis of vehicle driver’s seat through simulation of the sitting process(Josip Juraj Strossmayer University of Osijek, Slavonski Brod, Croatia, 2014-04); ; In this paper, a method for ergonomic analysis of the seating comfort in the driver’s seat for passenger vehicles is presented in two phases. In the first phase, the comfort seating postures of the driver are analyzed considering the comfort angles for the placement of human body and the necessary space for foot controls in vehicles, as well as the ranges of adjustments of the driver's seat and steering wheel. According to the determined comfort postures, the seat-human body virtual system is modeled. In the second phase, virtual testing of the seating comfort is performed with two different body sizes for 50th and 80th percentiles of virtual mannequins. The results can be used further to improve the arrangement of the basic comfort components for the driver's seat in vehicles. Virtual solid model of driver's body and driver's seat was created, especially for analysis of the pressure distribution on the contact surface of the virtual human body and the seat cushion foam. Virtual testing was performed using software package ABAQUS, simulating processes with finite element analysis method (FEA). The testing includes variation of the spatial mechanical properties of polyurethane foam and variation of the male body sizes for 50th and 80th percentiles. The results from the virtual testing were verified experimentally using pressure distribution mapping sensors. Using the virtual testing system for seating comfort, design changes of the seat can be introduced and verified. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Determination of disassembly interference matrix and improved nondestructive disassembly sequences for the product(Faculty of technical sciences Novi Sad, DEPARTMENT OF PRODUCTION ENGINEERING, 2018-09)This paper presents improved method for determination of disassembly interference matrix and improved nondestructive disassembly sequences during the product evaluation stage. The main objective of the improved method for nondestructive disassembly is increasing of recycling, recovery or reuse of the components. The determination of disassembly interference matrix is based on information obtained from 3d CAD model of product and developed software package. The goal of this research is to support and help product designer to create product with improved performance in order to nondestructive disassembly and predict, evaluate and define nondestructive disassembly sequences with low costs for disassembly, minimizing of reorentation of tools in the design stage when the 3d CAD model of product is avaliable. Verification of the improved method for determination of disassembly interference matrix and improved nondestructive disassembly sequenses is presented through an illustrative example. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, BICYCLE HELMET DESIGN AND THE VIRTUAL VALIDATION OF THE IMPACT, AERODYNAMICS AND PRODUCTION PROCESS(Facta Universitatis, 2017-11) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Nondestructive disassembly process of technical device supported with augmented reality and RFID technology(Faculty of Mechanical engineering – Banja Luka, 2017-05); This paper presents nondestructive disassembly process of technical device supported with augmented reality system and RFID technology. During the last few decades, the rapid development of automobiles, electric and electronic equipment, resulted in creation of billions tones of waste. For instance, “around 3 billion tonnes of waste are generated in the EU each year - over 6 tonnes for every European citizen. The new recycling/reuse concept uses the nondestructive disassembly process of technical device supported with augmented reality and RFID technology. System includes marking the products with components of interest by using a RFID tag. The products can be marked with a RFID tag that will contain the ID of the product design in the centralized database. The recycling/reuse facilities use this ID to download data relevant for nondestructive disassembly of the product and obtaining the components of interest. The system is modular and extensible in terms of the services and remanufacture offered. The overall system has a forum that is helpful in communication between recycling/reuse facilities and product designers. Augmented reality system offers video presentation when possible to visualize the disassembly process. The database contains valuable data for the product regarding the materials and component of interest used for each of the components in the product. Main objective of this paper is developing of a new recycling/reuse concept by using the nondestructive disassembly process supported with augmented reality and RFID technology. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Mechatronic and MCAD modelling of novel telemanipulator for minimally invasive surgery(Lviv Polytechnic National University and Warsaw University of Technology, 2016-10) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Design of bicycle plastic bottle holder and technological aspects by using solidworks plastic(Lviv Polytechnic National University and Warsaw University of Technology, 2016-10); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Influence of oil quality and viscosity on some quality components of vehicle power transmission(Faculty of Mechanical engineering-Skopje, 2016-10); ; In this paper, the influence of oil quantity and viscosity on the heating state of the vehicle power transmission aggregate and the loo of power in it are analysed. Employing the design of experiments method, statistical mathematic model is determined by which the relation between the above stated components of the aggregate quality and the oil placed in it is determined. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Modification of the diaphragm spring fingers beginnings and its influence on the spring stress distribution and stiffness curve(Faculty of Mechanical engineering-Skopje, 2016-10); ; ; The diaphragm spring is often used as part of the vehicle clutch assembly. The main function of the spring is to engage and disengage the pressure plate and the driven plate (clutch disk). At the time when the clutch is disengaged, the pressure plate is released and the driver can change or shift the gear. The spring is pressed with the press/release bearing from the top. The analyzed spring consists of several spokes (called spring fingers) that are set in conical shape. The spring finger beginning is the most stressed part of the spring. It acts as a lever and is subjected to numerous cycles of exploitation. In this paper is analyzed the stress distribution of the spring finger beginning. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, 3d finite element analysis of tooth contact of spur gear(Faculty of Mechanical engineering-Skopje, 2016-10); ; ; In this paper a study for determination of the maximum contact stresses in the tooth contact zone among a couple of spur gear is realized by using 3d finite element analysis. The most common damages which can be seen on tooth surface are pitting and the reason for that are contact (Hertz) stresses. In this research the analytical strength calculations and virtual testing are used for obtaining a maximum contact stresses. The results obtained are compared with the value given by two approaches, the theory of Hertz and virtual testing. The obtained results are very similar which is shown graphically in the paper. Therefore, the presented method for determination of maximum contact stresses in the tooth contact zone and the 3d finite element analysis enables obtaining improved spur gear for a relatively short time and reduces price. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Computer-aided design of stirrup cutting and bending machine for mass production(Technical University of Sofia, Center for research and design in human comfort, energy and environment, 2015-05)Product development is a complex and important phase of overall creative chain of new product development. University education has big problems in making of quality and personnel who will give solutions to all challenges meet in the practice. The industry will confront more and more with the absence of quality personnel and will require from the university to educate personnel who will be able to respond to the today and future challenges. In order to improve this situation for young engineers who work in the companies, it is required for engineering education to improve of key qualification during studies. In the framework of the KaLeP (the Karlsruhe education model for product development) educational model and its use in the higher education, an example of implementation of the integrated product development (IP) at the Faculty of Mechanical Engineering in Nis is presented, it’s achieved through the training of young engineers to implement KaLeP for product development in regional industries.