Mechanical and engineering systems
Permanent URI for this collectionhttps://dspace.univ-boumerdes.dz/handle/123456789/9645
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Item Thermodynamic analysis of a condenser vacuum from the central Ras-Djinet(Université M’Hamed Bougara Boumerdes : Faculté de Technologie, 2017) Rahmani, Abdenour; Rial, Soumia; Djedid, T.(Promoteur)In this Work he studied the influence of the temperature and flow of sea water, therefore the inlet air,exchange surface,impassibility on the vacuum of the condenser. We have applied the thermal NUT method in order to evaluate the thermal exchange of the gas condenser. And we have realized a thermodynamic analysis of the overall water vapor circuit.We found that the temperature of sea water increases, the condensation temperature increase while the pressure of the condenser of the cycle efficiency decreaseItem Thermal and mechanical study of niigata 6MG28BX piston engine(Université M’Hamed Bougara Boumerdes : Faculté de Technologie, 2017) Bourouis, Athmane; Deriche, Mohammed Amine; Djedid, Toufik(Promoteur)The Main objective of this study is to appreciate the material choice in the Diesel engine piston head with direct injection on the mechanical and thermal stresses.We focused our study on the 6MG28BX engine type NIIGATA.For this study,the simulation is done applying the finite elements method using ANSYS software.Then,an analysis of deformations on each material was made.The obtained results were compared to obtain the best characteristicsItem Study of the mechanical behavior of single edage notched tension (SENT)(Université M’Hamed Bougara Boumerdes : Faculté de Technologie, 2017) Chafai, Oussama; Kaabouche, Ali; Settet, Ahmed Tidjani(Promoteur)In this Work,we tried to understand and estimate the composite material’s rupture and how it reacts in the presence of different fracture dimensions especially for composite materials that are made by carbon/epoxy and glass/epoxy,so we prepared specimens using this two materials then we created different crack sizes and angles in the aim to see the propagation of the cracks and deduce the displacement,the deformation and stresses.We simulated plan specimens (without crack) and specimens that gave us the weakest results using the simulation program ‘Ansys’.then we tried to compare theses experimental results with the other results that are obtained using simulation study of the critical specimensItem Study of honeycomb panels under tensile stresses and bending(Université M’Hamed Bougara Boumerdes : Faculté de Technologie, 2017) Djellab, Amira; Hamzaoui, Nabil; Settet, Ahmed Tidjani(Promoteur)In this paper,we study the stresses applied to honeycomb sandwich panels.To do this we have prepared three samples of panels with the same core and faces of different materials and these are carbon fiber fabrics and glass fibers and then applied two types of stresses:tensile and flexural.The third type,shear stress, was illustrated using ANSYS software.The results obtained allowed us to distinguish the critical zones from the stress concentrations on the sandwich panelItem Study of active vehicle suspension systems with fuzzy logic controller(Université M’Hamed Bougara Boumerdes : Faculté de Technologie, 2017) Mouffok, Bessma; Settet, Ahmed Tidjani(Promoteur)The Objective of this work to study the active and the passive suspension for compared it with the sky-hook model reference ,with different road profile.The performance of the controller is compared with fuzzy logic controller and the active suspension system by performing computer simulations through the MATLAB and SIMULINKItem Static analysis of a smart sandwich beam subject to an extension force(Université M’Hamed Bougara Boumerdes : Faculté de Technologie, 2017) Maghnini, Khaled; Mekiri, Abdelghani; Aghib, Salah(Promoteur)The Composite materials in magnetorheological elastomer (intelligent material) possess mechanical properties important.These materials are incorporated into mechanical structures such that the beams,plates and shells,these structures sandwiches in MRE are recently used in many industrial sectors because of their high flexural stiffness accompanied by strong energy dissipation.In this work we studied the static behavior of beam composed of a core in elastomer magnetorheological inserted between two skins in aluminum.To well understand the behavior of these structures there has developed a digital approach by the method of Ritz as well as a simulation by MEF under the Code of calculation ABAQUS,the results found are well faceItem Reliability study of the ajax_supirior compressor(Université M’Hamed Bougara Boumerdes : Faculté de Technologie, 2017) Seddiki, Nourhane; Djedid, Toufik(Promoteur)The Work presented in this project has an objective to analyze the reliability of a volumetric compressor using Weibull method to evaluate the actual state of the machine.To realize this work we have used the historical data of the machine evaluated by the company during the last 5 yearsItem Influence of the orientation of a multiple crack in V-shape under tensile stresse(Université M’Hamed Bougara Boumerdes : Faculté de Technologie, 2017) Ghazli, Tarik; Mezili, Adel; Settet, Ahmed Tidjani(Promoteur)We studied the influence of the orientation of the crack under tensile testing of composite plates (glass / epoxy and carbon / epoxy).We four chapters. First,the definition and characteristics,the advantage and the disadvantage of the composite materials, we also spoke about the laminate and the orientation of the fibers.Second,the theories and laws of failure and fracture according to different criteria,energy criterion,Tsai_wu criterion,tsai-hill criterion.Thirdly, we experimented on fiberglass and carbon fiber reinforced epoxy matrix plates with different sizes and orientations of cracks.Finally, we made a model using the Abaqus software to compare the results Between experimental and simulationItem Effet of the turbofan thrust improvement on the fan blades strength(Université M’Hamed Bougara Boumerdes : Faculté de Technologie, 2017) Boumedine, Asma; Hemidi, Ouarda; Brahimi, Faïza(Promoteur)In this Work he interested in showing the effect of the Mach number as well as the material type of the fan blades of a turbo fan on the resistance of the structures to the forces exerted by the fluid The work has three main parts geometric modeling which consists of constructing the 3D geometry of the blade of the fan by generating the profiles on a three dimensional measuring machine.The simulation of the flow through the fan blades using one of the best CFD codes,ANSYS CFX and finally the simulation of the movement of the structure with the ABAQUSsoftwareItem Effect of the compressor cooling on the blades mechanical strength(Université M’Hamed Bougara Boumerdes : Faculté de Technologie, 2017) Iben El Boushaki, Zakaria; Berchache, Mourad; Brahimi, F.(Promoteur)In this Work, he will address to the study of the air flow simulation over a compressor blade and measuring the forces acting on them,so to analyze the Aerodynamic flow over the blade, computational fluid dynamics (CFD) is a powerful method for this simulation.The flow around the compressor blade is studied and analyzed using three types of Materials ( Steel,Titanium Alloy,Aluminum Alloy) with the profile NACA 65-10%,the same operating conditions are applied to compute the performance parameters,i.e. Static pressure, Velocity and the aerodynamic coefficients which are the Lift and the drag,after that we conclude the forces according to these two parameters (Lift and Drag).Then we will address to study the effect of the aerodynamic forces which are by the air flow on the blade surface and its influence on the Von Mises stress and the total deformation to see which of these three materials is better for operating and more powerful and resistant than the two others while the forces are acting on them