Makina Mühendisliği: Recent submissions

  • Quasi-LPV modeling and control of twin rotor multiple input multiple output system 
    Baştürk, Halil İbrahim. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)
    The aim of this thesis is to design a Linear Parameter Varying (LPV) controller for Twin Rotor Multiple Input Multiple Output System (TRMS) which has highly nonlinear and cross coupled mathematical model, using Linear ...
  • Design of composite laminates for optimum frequency response 
    Kayıkçı, Rengin. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)
    In this study, natural frequency response of symmetric laminated composite plates was optimized. An analytical model accounting for bending-twisting effects was used to determine the laminate natural frequency. In this ...
  • Domain decomposition analysis of aerodynamic coupling 
    Aydın, Özkan. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)
    The main objective of this research is the computational modeling and analysis of aerodynamic-coupling effects of multiple bodies in motion in a fluid using domain decomposition techniques. Simulation of such a flow field ...
  • The precipitate evolution in the nickel-based superalloy IN738LC 
    Erdeniz, Dinç. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)
    IN738LC is a polycrystalline, nickel-based superalloy, which is widely utilized in a variety of applications such as jet engines and land-base gas turbines. This material provides high performance at temperatures above ...
  • Experimental and numerical investigation of tool-part interacions in composites manufacturing 
    Özsoy, Övül Özgü. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)
    Composite parts may undergo some shape distortions due to the residual stresses generated during the cure cycle. This may cause difficulties in assembling composite structures. This experimental and numerical work is done ...
  • Effects of compatibilizer type and proceessing parameters on mechanical properties of polypropylene-clay nanocomposites prepared by melt mixing 
    İşlier, M. Bora. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)
    The effects of compatibilizer type and the processing conditions on polypropyleneclay nanocomposite preparation by melt extrusion were investigated. The objective of the study was to optimize the nanocomposite formulation ...
  • Computational investigation of non-isothermal lid-driven flow in arc-shape cavities 
    Adli, Ali Reza Rezaei. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)
    This thesis is concerned with the numerical analysis of laminar unsteady flow and heat transfer in lid-driven arc-shape cavities with different aspect ratios for which the top lid, maintained at lower temperature, is driven ...
  • Combined longitudinal-torsional vibration of sandwiched piezoelectric ultrasonic transducers 
    Demir, Bülent Güven. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    In this thesis, combined longitudinal-torsional vibration of ultrasonic transducer using impedance matching method is studied. In combined vibration, two modes must resonate in the same frequency. Impedance matching method ...
  • Finite element analysis of bolted joint subjected to impact loading 
    Tanlak, Niyazi. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)
    Mechanical components are commonly fastened together through bolts. Many times, they are subjected to impact loads in use. The behavior of the joints under these conditions should be known in a design process. The objective ...
  • The effects of alloying elements on the microstructure and annealing behavior of the twin-roll cast AA1050 strip 
    Karakoyun, Fatih. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    There are two main routes of sheet aluminum production DC casting and hot rolling route and continuous casting and cold rolling route. DC casting and hot milling route is the conventional way of production, the process is ...
  • Control of an obstacle avoider mobile robot using image processing 
    Kulgu, Turgay. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    This study investigates control of a mobile Lego robot moves towards to the specified target without hitting the obstacles with the help of image processing. An experimental set-up was designed and conducted for experiments. ...
  • The effects of process parameters on the cell morphology of the aluminum foam 
    Uçak, Tolga. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    Aluminum foams have gained a considerable amount of attention in recent years with their very low specific weight, relatively high compression strength among cellular materials combined with good energy absorption. In the ...
  • Influence of processing variables tools and materials on the physical properties of powder metallurgy products 
    Topaloğlu, Vasil. (Thesis (M.S.)- Robert College. Faculty of Graduate School of Engineering, 1965., 1965.)
  • Optimum preform and die shape design for improved hardness distribution in cold forged parts 
    Tümer, Haluk. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    To predict and then to control hardness distribution in a cold formed part is important, since it is a critical property due to its effects on the forgability of the part and its performance in use. In cold forming processes, ...
  • Determination of the effect of viscoelasticity on the bond strength of a dental metal-ceramic system using finite element method 
    Ünlü, Utku Cemal. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    Porcelain-fused-to-metal (PFM) is a kind of restoration process used in pros- thetic dentistry, where a certain metal is cast as basement on which the dental ceramic is fused by firing. Due to the difference in the ...
  • K-dominanat region in 2-D functionally graded materials under mixed mode loading 
    Altay, Gökce. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    The extent of K-dominant region around the crack tip of a functionally graded plate under mixed mode loading is investigated. A center cracked plate is used for the study. The stress intensity factors and T-stresses are ...
  • Aerodynamic analysis of a paraglider wing using domain decomposition techniques 
    Başol, Altuğ Melik. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    The flow around a curvature tube is investigated using it as a simple 2D model of a paraglider wing based on the similarity between their top views. The solutions are obtained for five different angle of attacks varying ...
  • IDLE speed control of a diesel engine 
    Akyıldız, Bahadır. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    In this thesis, model based idle speed control of a diesel engine is studied. Since diesel engine models derived from first principles are very complicated, a mean-value diesel engine model which captures the dynamics of ...
  • The effects of solidification conditions on the formability of the twin-roll cast AA1050 strip 
    Atlı, Kadri Can. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    Twin-roll casting (TRC) is a continuous sheet metal casting process, which was developed as an alternative to the conventional “ingot casting and hot mill method” of sheet metal production. Unlike the latter method, TRC ...
  • Effects of thermal conditions on the mechanical properties of squeeze cast ZA-27 alloy 
    Morgül, Erol. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    Squeeze casting is a generic term to specify a fabrication when solidification is promoted under high-pressure within a re-usable die. It is a metal-forming process, which combines permanent mould casting with die forging ...