22 Articles Published

1. EFFECT OF TRANSVERSE WELD POOL OSCILLATION (TWPO) ON TENSILE PROPERTIES OF AA 6101 T6 ALUMINIUM ALLOY WELDS

Authors: BIPIN KUMAR SRIVASTAVA , JYOTI PRAKASH , S. P. TEWARI

Abstract: In AA6101 T6 aluminium alloy, the weld fusion zones typically exhibit coarse columnar grains because of the prevailing thermal conditions during weld metal solidification. This often causes inferior weld mechanical properties and poor resistance to hot cracking. But when Gas Metal Arc Welding(GMAW) process under oscillatory condition is used then enhancement in mechanical properties noticed. Total cooling rate increases due to weld pool oscillation. Stirring of the weld pool increases the effective value of the thermal conductivity of the liquid pool because heat transfer in the weld pool becomes more effective. This helps nuclei in the weld pool survive and hence promote the formation of equiaxed fine grains in the fusion zone. In the present work, tensile properties, micro hardness, microstructure of the GMAW joints have been evaluated, and the results are compared with oscillated GMAW joints. It is found that GMAW joints under oscillatory condition ( optimum at amplitude 5 micro met

Keywords: AA6101 T6 aluminium alloy, Gas metal arc welding, Tensile properties, Grain size

Pages: 1 - 7 | DOI: 10.15224/978-1-63248-031-6-140

2. PREDICTING CUTTING FORCE FOR FLAT END MILLING BASED ON DEXELS GEOMETRIC MODEL

Authors: M. BEY , S. ABAINIA

Abstract: In milling process, and when machining sculptured surfaces cutting forces are variables. Due to the continuous curvature variations of these surfaces abrupt variations in cutting forces are engender. The aim of this research work is to predict the milling forces along tool path during finishing of sculptured surfaces with flat end mills on 3-axis CNC milling machines, using a predictive mechanistic model of cutting forces and a geometric workpiece modeled with Dexels. The main steps of the proposed approach are: 1) approximation of the workpiece by Dexels, 2) milling simulation that consists to simulate the removal material between tools and workpiece by localization the contact regions and 3) cutting forces prediction.

Keywords: Sculptured Surfaces, Dexel, Flat End Mill, Tool Envelope, Tool-workpiece Contact Regions, Mechanistic Forces Model

Pages: 8 - 12 | DOI: 10.15224/978-1-63248-031-6-141

3. COUPLED ELECTROMAGNETIC AND THERMAL-FLUID ANALYSIS FOR A PERMANENT MAGNET SYNCHRONOUS MOTOR

Authors: HAO-YEN CHANG , YEE-PIEN YANG

Abstract: This paper proposes a coupling analysis of the electromagnetic and thermal-fluid fields in an interior permanent magnet motor for electric vehicles. Both electrical and magnetic materials have temperature-dependent properties. The power loss produced by the electromagnetic analysis reheats the motor and its rise in temperature alters the material properties as well as motor performance. The temperature-dependent power loss is used as a heat source to create a lumped-circuit thermal model in terms of equivalent thermal resistances and thermal capacitances, in order to investigate the transient response of the motor. Simulation results confirmed that coupled electromagnetic and thermal-fluid analysis is able to predict the performance of a motor prior to its prototyping.

Keywords: electromagnetic analysis, thermal-fluid analysis, coupling simulation, temperature dependence.

Pages: 13 - 17 | DOI: 10.15224/978-1-63248-031-6-142

4. ON PRODUCTION OF MAGNETIC MATERIALS HAVING NIO1-XZNOXFE2O4

Authors: CENK MISIRLI , MUMIN SAHIN , MUSTAFA ARAS

Abstract: In this study, characteristics and magnetic properties of magnetic materials having NiO1-xZnOxFe2O4 structure were investigated. Mechanical mixing of high purity NiO, ZnO and Fe2O3 powders were done to obtain homogenous NiO1-xZnOxFe2O4 powder mixture for x=0.15, x=0.50 and x=0.85. These powder mixtures were pressed using hydraulic press machine and then subjected to sintering at same temperatures of 10000C for 1 hour. Obtained specimens were analysed with SEM (Scanning Electron Microscopy) imaging and EDXRF (Energy-Dispersive-X-Ray Fluorescence) technique for the investigation of structural analysis; magnetic properties was determined using VSM (Vibrating Sample Magnetometer).

Keywords: Magnetic Materials; NiO1-xZnOxFe2O4 ; Properties

Pages: 24 - 28 | DOI: 10.15224/978-1-63248-031-6-144

5. MHD NATURAL CONVECTION OF NANOFLUID FILLED TRAPEZOIDAL ENCLOSURE WITH A STATIONARY ADIABATIC CYLINDER

Authors: HAKAN F. OZTOP , FATIH SELIMEFENDIGIL

Abstract: In this study, MHD free convection of a nanofluid filled trapezoidal cavity with a stationary adiabatic circular cylinder is numerically investigated. The bottom wall of the cavity is heated and the side walls are kept at constant temperature lower than that of the heater. Other walls of the enclosure and cylinder surface are assumed to be adiabatic. The governing equations are solved with a commercial solver using finite element method. The effects of the Grashof number, Hartmann number and solid volume fraction of the nanoparticle are numerically studied for both cylinder and no-cylinder configurations. It is observed that averaged heat transfer decreases with increasing Hartmann number, decreasing Grashof numbers and increasing inclination angles of the side walls. The presence of the cylinder deteriorates the averaged heat transfer and this is more pronounced at low Grashof, high Hartmann numbers and high values of inclination angles of side walls. Averaged heat transfer increases

Keywords: MHD, nanofluid, obstacle, CFD, finite element

Pages: 29 - 32 | DOI: 10.15224/978-1-63248-031-6-145

6. ADAADAPTIVE CONTROL OF HYBRID PSO-APGA USING NEURAL NETWORK FOR CONSTRAINED REAL-PARAMETER OPTIMIZATIONPTIVE CONTROL OF HYBRID PSO-APGA USING NEURAL NETWORK FOR CONSTRAINED REAL-PARAMETER OPTIMIZATION

Authors: HIROSHI HASEGAWA , HIEU PHAM , TAM BUI

Abstract: This paper describes an evolutionary strategy called PSOGA-NN, which uses Neural Network (NN) for self-adaptive control of hybrid Particle Swarm Optimization and Adaptive Plan system with Genetic Algorithm (PSO-APGA) to solve large scale problems and constrained real-parameter optimization. This approach combines the search ability of all optimization techniques (PSO, GA) for stability of convergence to the optimal solution and incorporates concept from neural network for self-adaptive of control parameters. It is shown to be statistically significantly superior to other Evolutionary Algorithms (EAs) on numerical benchmark problems and constrained real-parameter optimization.

Keywords: Adaptive Plan, Neural Network, Parallel Genetic Algorithm, Particle Swarm Optimization, Real-parameter

Pages: 33 - 38 | DOI: 10.15224/978-1-63248-031-6-146

7. PROCESSING OF ZA-27 BASED MMC REINFORCED WITH AL2O3 BY CENTRIFUGAL CASTING

Authors: JAGATH M , K CHANNAKESHAVALU , PATHIPATI NAGA JYOTHI , SHAILESH RAO AGARI

Abstract: In the present work, ZA-27 metal matrix composites reinforced with Al2O3 are prepared by Centrifugal casting process. Pre-treated ceramic particles are reinforced into the molten ZA 27 in different weight proportions as 5,10,15,20 and 25 % wt. at rotational speed of the mould as 400rpm. Mechanical properties of these different types of composites are compared in the present analysis. It is observed that with 20 % Wt. of Al2O3, hardness, tensile and compression strength values are improved, but at the cost of ductility.

Keywords: ZA-27 metal alloy, MMC, Al2O3 ceramic particles

Pages: 39 - 43 | DOI: 10.15224/978-1-63248-031-6-147

8. OPTIMIZATION OF PRODUCTION ORDERS INPUT TO MANUFACTURING SYSTEM CREATING DATABASE OF SIMULATION MODELS TO SUPPORT THE TEACHING

Authors: IVANA SIMEONOVOVA , ROBERT HOFMAN , RADEK KNOFLÍCEK

Abstract: This article is part of a project Creating database of simulation models to support the teaching of subjects: Modeling and simulation of production systems (GMV, GMV-A) and Production Planning and control (GPR, GPR-A) supported by Science Fund of FME 2014. The folowing arcticle is part of simulation models database designed for educational purposes. It describes practical use of line production system computer simulation. The aim of simulation is to find optimal distribution of production orders input to manufacturing system. Simulation is a noninvasive method by which can be monitored and analyzed the behavior of real system or system in level of design. This means that it is possible to examine the effect of changes in the production system without consequences, which should have their application to the real system. In this article is described the definition of simulation model to which are performed experiments. The experimental results can be applied in practice for streamlining

Keywords: computer simulation, simulation model, normal distribution, optimization, local minimum

Pages: 49 - 53 | DOI: 10.15224/978-1-63248-031-6-149

9. HIGH PRODUCTIVITY OF SUBMERGED ARC WELDING ACHIEVED WITH MULTIPLE-WIRE TECHNOLOGY

Authors: CARMEN CATALINA RUSU , ELENA SCUTELNICU , LUIGI-RENATO MISTODIE , NICUSOR ENE

Abstract: The paper addresses a comparative analysis between theoretical and experimental results of the deposition rates, achieved by Submerged Arc Welding, when single and multiple wires technologies are applied. Two welding variants have been investigated in the research program, one power source welding on the one hand and two power sources welding (Tandem technique) on the other hand. Classical welding current power sources - i.e. standard DC and rectangular waveform AC - and also the most recent inverter power source, which allows waveform modulating, were selected and used in the experimental program. Comparing the deposition rates achieved in the case of using two conventional power sources systems (Tandem Single + Single wire welding) with values achieved in the case of multiple-wire welding technique (even if a traditional welding system with only one single power source is used), a higher productivity of the welding process has been noticed when multiple-wire technology is applied. Fi

Keywords: submerged arc welding, Tandem, Twin, ICETM, multiple-wire welding technique, deposition rate

Pages: 54 - 58 | DOI: 10.15224/978-1-63248-031-6-150

10. VIBRATION ANALYSIS OF NANOBEAM CARRYING NANOPARTICLE BASED ON NONLOCAL ELASTICITY THEORY

Authors: NECLA TOGUN

Abstract: In this study, vibration of effect of nanoparticle on an Euler-Bernoulli nano-beam is investigated using nonlocal elasticity beam theory. Equation of motion of nanobeam is obtained using Hamilton’s principle. The dimensionless equations are solved for the various boundary conditions. Approximate solutions of the equations are obtained by using the method of multiple scales a perturbation technique. The first terms of the perturbation series lead to the linear problem. Exact solutions are given natural frequencies for the linear problem. The effects of the different nonlocal parameters () and mass ratios () as well as effects of different boundary conditions on the vibrations are determined.

Keywords: vibration, nanobeam, nanoparticle, perturbation method, nonlocal elasticity

Pages: 59 - 63 | DOI: 10.15224/978-1-63248-031-6-151

11. INVESTIGATION OF TEMPERATURE FIELD GENERATED BY THE TANDEM SUBMERGED ARC WELDING PROCESS

Authors: BOGDAN GEORGESCU , CARMEN CATALINA RUSU , DAN BIRSAN , DANIEL VISAN , EMIL CONSTANTIN , LUIGI-RENATO MISTODIE , OCTAVIAN MIRCEA

Abstract: Process welding simulation is a useful tool for investigation of heat transfer, temperature field distribution, melted pool dynamics, cooling rate and, further, prediction of microstructure changes in the welded joint. The high temperature reached in the fusion zone and heat affected zone can cause phase transformations and alteration of the mechanical properties produced in the parent metal. Given the great influence of heat transfer, an accurate evaluation of temperature field generated by the welding processes is needed, in order to properly predict the base material behaviour, such as microstructure evolution, stress analysis and, finally, the quality level of the welded joint. The paper presents a detailed investigation of temperature field distribution in the case of Tandem Submerged Arc Welding (TSAW) process applied to join plates of pipeline steel. A 3D numerical model was developed and experimentally validated by comparing the thermal cycles achieved through finite element an

Keywords: Tandem Submerged Arc Welding, FEA, infrared thermography, thermocouples

Pages: 64 - 68 | DOI: 10.15224/978-1-63248-031-6-152

12. MONITORING SYSTEM OF TEMPERATURE FIELD IN PIPELINE SUBJECTED TO MULTI-WIRE SUBMERGED ARC WELDING

Authors: CARMEN CATALINA RUSU , ELENA SCUTELNICU , LUIGI-RENATO MISTODIE , NICUSOR ENE

Abstract: The investigation focuses on particular aspects and features related to the spatial measurement of temperatures, in the case of longitudinal multiple-wire submerged arc welding of pipelines. The research methodology is based on the combination of traditional measuring methods of temperature, such as thermocouples and digital pyrometers, with modern methods, like infrared thermography technique. The infrared thermography method provides the temperature field distribution on the welded plate surface, while numerical methods give information on temperature in the entire welded joint, including on the plate thickness. The authors propose a dual monitoring system of temperature measurement in longitudinal welded pipelines which comprises K-type thermocouples and an infrared thermo-camera. The temperatures values are recorded through four devices (recorders) with different number of channels which continuously monitor the temperature in the welded joint. The thermo-camera is used to acquire

Keywords: submerged arc welding, pipelines, temperature, monitoring, thermography, thermocouples

Pages: 69 - 73 | DOI: 10.15224/978-1-63248-031-6-153

13. STABILITY OF POWER GRIDS WITH SIGNIFICANT SHARE OF WIND FARMS

Authors: ANDRZEJ BIELECKI , MARZENA BIELECKA , MATEUSZ WOJCIK , MIROSLAW WLUKA , TOMASZ BARSZCZ

Abstract: Wind power is a promising source of energy. It has, however, its own specificity. Unpredictability and low wind conditions stability are the important problems the users of wind power are faced with. These problems are considered in the paper. The type of big wind turbine is described as well.

Keywords: power grids, vertical axis wind turbines

Pages: 74 - 78 | DOI: 10.15224/978-1-63248-031-6-154

14. OPC UA FOR MACHINE TENDING INDUSTRIAL ROBOTS PROTOTYPIC DEVELOPMENT OF AN OPC UA SERVER FOR ABB INDUSTRIAL ROBOTS

Authors: BURKHARD KITTL , FLORIAN PAUKER , IMAN AYATOLLAHI

Abstract: In this paper an information model and a prototype OPC UA server using this model for data acquisition, event generation and remote control of a machine tending industrial robot is described. Necessary information is transferred from the ABB machine tending software, mapped to appropriate nodes of the information model, and exposed by the OPC UA server. The authors believe that OPC UA with its extensible modelling potential is well suited as a communication technology in this field of manufacturing automation. OPC UA is still not being applied to its full potential in this area. Occasionally some industry driven efforts are observed to map existing data models to the most recent OPC specifications (UA), but the development of semantic rich information models is mainly neglected. For demonstration purpose a prototypic OPC UA server with a simple information model for an ABB IRB 120 industrial robot was realized. The robot controller provides the server with data by using the ABB PC Inte

Keywords: OPC UA, robot, machine tending, ABB, communication interface

Pages: 79 - 83 | DOI: 10.15224/978-1-63248-031-6-155

15. MATHEMATICAL MODEL OF AUTONOMOUS UNDERWATER VEHICLE

Authors: BORIS GURENKO

Abstract: In this paper, we propose an approach of the construction of a mathematical model of AUV, taking into account the hydrodynamic characteristics, which were obtained with CFD software. AUV considered in this article has a torpedo shape with a thrust-vectoring module and two (horizontal and vertical) auxiliary thrusters located in the bow.

Keywords: mathematical model, underwater vehicle, autonomous vehicle

Pages: 84 - 87 | DOI: 10.15224/978-1-63248-031-6-156

16. AN EXPERIMENTAL ANALYSIS OF SURFACE ROUGHNESS OF EN9 STEEL UNDER THE INFLUENCE OF PRESSURIZED STEAM JET

Authors: AMIT KUMAR LAKRA , JOSEPH EKKA

Abstract: This paper discusses the ideal solution for minimizing surface roughness in grinding operation on EN9 steel by using pressurized steam jet as a coolant and analyse it using Grey Relational Analysis methodology. The collective analysis of the measured results were performed with the help of commercial software package Minitab 17 and the experiments were conducted using L18 orthogonal array experimental design technique. The test conditions matrix included three different values of steam pressures, two different values of feed rates, three different values of depth of cut and three surface treatment conditions which were used as parameters during grinding operation, while cutting speed was kept constant at 2840 rev/min. The determination of optimum cutting conditions for minimizing the surface roughness was observed analytically under the effect of different cutting parameters on surface roughness. The experimental results revealed that the optimal combination of machining parameters for

Keywords: ANOVA, Pressurized Steam Jet, Surface Roughness, Grinding, Grey Relational Analysis, Orthogonal Array, Surface Treatment Condition

Pages: 112 - 116 | DOI: 10.15224/978-1-63248-031-6-179

17. MECHANICAL BEHAVIOR OF MWCNT REINFORCED GFRP COMPOSITES UNDER FATIGUE CONSTANT AMPLITUDE LOADINGS WITH THE PRESENCE OF ARTIFICIAL NOTCHES

Authors: ACHILLES VAIRIS , ILONA LAZARIDOU , NIKOLAOS D. ALEXOPOULOS

Abstract: This work studies the effect of artificial surface notches on glass fiber reinforced polymers (GFRPs) under constant amplitude fatigue loadings and for various nano-reinforced matrices. Different concentrations of Multi-Wall Carbon Nanotubes (MWCNTs) were added to the resin before the vacuum assisted resin infusion (VARI) of the composites. Three different MWCNT nanocomposites were manufactured that had concentrations namely 0.5, 0.75 and 3.0 wt% MWCNTs. Before testing, an artificial notch was introduced and two different regions of the composite was continuous monitored during mechanical testing: (a) healthy (without defect) and (b( notched (with the presence of defect). Fatigue tests were performed and with different fatigue maximum stress levels so as to address all fatigue regimes. It was found that a sudden increase takes place on the transition of stage III of the fatigue mechanism. This sudden increase point in the electrical resistance change was applied maximum stress as well

Keywords: Carbon nanotubes, Glass fibers, Mechanical properties, Electrical resistance change method

Pages: 102 - 105 | DOI: 10.15224/978-1-63248-031-6-167

18. STUDY THE INTERNAL SURFACE AND GEOMETRICAL CHARACTERISTICS OF CYLINDRICAL WORKPIECE IN ECH

Authors: JATINDER KAPOOR , SANDEEP SALARIA

Abstract: Electrochemical honing (ECH) is an electrolytic precision micro-finishing technology based on the hybridization of the electrochemical machining and conventional honing process. The ECH technology provides the controlled functional surface generation and fast material removal capabilities of work piece in a single action. This paper presents the distinctive findings of wide-ranging experimental research designed to explore the effect of key ECH process parameters on the workpiece surface micro-geometrical and material removal aspects. In the present work, an experimental setup was designed to study the effect of key parameters on the performance of internal surface and geometric characteristics. The electrolyte concentration, rotary speed, sticks out pressure and flow rate are process parameters selected for the experimental work. Design of experiment is employed for conducting the experiment and analyzing the data. Quadratic equations have been developed to analyze the effect of param

Keywords: Electrochemical Honing, Surface roughness, Out of Roundness, Electrolyte concentration, Stick out pressure

Pages: 98 - 101 | DOI: 10.15224/978-1-63248-031-6-165

19. ANALYSE FOR TYPES AND METHODS OF WELDING IN INERT GAS ENVIRONMENT

Authors: IVAN STEFANOV ZYUMBYULEV , STEFAN KIRILOV KARTUNOV

Abstract: Argon, helium, hydrogen, nitrogen, oxygen, and carbon dioxide are the shielding gases employed in we ding. Some othem differ greatly in their specific weight, chemical behavior, energy content, and espec ally thermal conductivity, energies of dissociation and ronization, and other properlres. By optimally combining a variety of characteristics, gas mrxtures of particular benefit will be obtained, above all ensuring sound welds and the desired profitability, Examples of a number of materials welded with various pro cesses will be presented and discussed.

Keywords: welding in inert gas, Constant Flow Gas Mixers

Pages: 93 - 97 | DOI: 10.15224/978-1-63248-031-6-158

20. ADVANCED RE-ENGINEERING APPROACH IN HUMANOID ROBOT DEVELOPMENT

Authors: SEBASTIAN FELDMANN

Abstract: Based on new findings from human communications research, which show that in a social environment robots are accepted only if they are able to perform natural human movement, this contribution presents a new approach to improve the development process of humanoid robot prototypes under the term of social acceptance. Using the examples of the human shoulder- and the human hip-movement, there will be examined how the concept of re-engineering can be introduced at humanoid robot development in early stage. It is demonstrated how the inclusion of knowledge about the anatomic basis of human movement can help to overcome major problems of acceptance currently discussed by the literature under the term Uncanny Valley.

Keywords: Re-Engineering, Humanoid Robot, Uncanny Valley, Skeleton, Development

Pages: 18 - 23 | DOI: 10.15224/978-1-63248-031-6-143

21. SOLAR-BIOMASS DRIVEN EJECTOR REFRIGERATION SYSTEM

Authors: MENANDRO S. BERANA , MARK ANTHONY B. REDO

Abstract: Based on new findings from human communications research, which show that in a social environment robots are accepted only if they are able to perform natural human movement, this contribution presents a new approach to improve the development process of humanoid robot prototypes under the term of social acceptance. Using the examples of the human shoulder- and the human hip-movement, there will be examined how the concept of re-engineering can be introduced at humanoid robot development in early stage. It is demonstrated how the inclusion of knowledge about the anatomic basis of human movement can help to overcome major problems of acceptance currently discussed by the literature under the term Uncanny Valley.

Keywords: ejector, cooling system, solar, biomass

Pages: 88 - 92 | DOI: 10.15224/978-1-63248-031-6-157

22. STUDY THE INTERNAL SURFACE AND GEOMETRICAL CHARACTERISTICS OF CYLINDRICAL WORKPIECE IN ECH

Authors: JATINDER KAPOOR , SANDEEP SALARIA

Abstract: Electrochemical honing (ECH) is an electrolytic precision micro-finishing technology based on the hybridization of the electrochemical machining and conventional honing process. The ECH technology provides the controlled functional surface generation and fast material removal capabilities of work piece in a single action. This paper presents the distinctive findings of wide-ranging experimental research designed to explore the effect of key ECH process parameters on the workpiece surface micro-geometrical and material removal aspects. In the present work, an experimental setup was designed to study the effect of key parameters on the performance of internal surface and geometric characteristics. The electrolyte concentration, rotary speed, sticks out pressure and flow rate are process parameters selected for the experimental work. Design of experiment is employed for conducting the experiment and analyzing the data. Quadratic equations have been developed to analyze the effect of param

Keywords: Electrochemical Honing, Surface roughness, Out of Roundness, Electrolyte concentration, Stick out pressure

Pages: 98 - 101 | DOI: 10.15224/978-1-63248-031-6-165