KOÇ UNIVERSITY Ph.D. and M.Sc. Programs in MECHANICAL ENGINEERING

Transcription

1 KOÇ UNIVERSITY Ph.D. and M.Sc. Programs in MECHANICAL ENGINEERING Innovative and Applied Research Graduate Scholarships Collaboration with Industry and Leading International Universities English Instruction Diverse Employment Opportunities upon Graduation Computer Aided Numerical Control (CNC) Systems and Machine Tools Automation and Mechatronics Composite Materials Manufacturing Human and Machine Haptics (Biomechanics, Robotics) Multi-Scale Experimental and Computational Mechanics of Materials RESEARCH AREAS Vibrations and Structural Dynamics Modelling and Design of Micro/Macro Systems Computational Materials Science (Polymers, Biomaterials, Shape Memory Alloys) Computational Fluid Dynamics Thermal and Bio/Micro Fluidic Systems Micro-Nano Fabrication Program details and forms are available at:

2 B. Erdem Alaca Ph.D. in Mechanical Engineering, University of Illinois at Urbana-Champaign, Web page: Development of micro and nano electromechanical systems (MEMS/NEMS) Materials behavior Engineering mechanics (elasticity, fracture, fatigue, plasticity) Facilities: Mechanical Characterization and Micro/Nano Systems Laboratories focus on development & fabrication of MEMS/NEMS and multiscale materials testing & modeling. The facilities include a Class-1000 cleanroom with full lithography line and metallization equipment, state-of-the-art mechanical characterization tools. Recent Publications: 1. O. Sardan, B. E. Alaca, A. D. Yalcinkaya, P. Bøggild, P. T. Tang, and O. Hansen, "Microgrippers: a case study for batch-compatible integration of MEMS with nanostructures", Nanotechnology 18, (2007). 2. D. Ulutan, B. E. Alaca, and I. Lazoglu, "Analytical modelling of residual stresses in machining", Journal of Materials Processing Technology 183(1), (2007). 3. K. B. Toga and B. E. Alaca, Junction formation during desiccation cracking, Physical Review E 74(2), (2006). 4. O. Sardan, A. D. Yalcinkaya, and B. E. Alaca, Self-assembly-based batch fabrication of nickel-iron nanowires by electroplating, Nanotechnology 17(9), (2006). Batch-compatible nanowire fabrication Nano-micro integration Design and fabrication of nanotweezers MEMS-based biosensors for drug detection Scale-dependence of mechanical behavior in thin films & multilayer fracture Grants: Fabrication of Nanotweezers by Self-Assembly (TUBITAK) Biosensor for Narcotics (TUBITAK) Current Graduate Students: Alibey Ozturk (B.S.: Bilkent 2006); Ozgur Ozsun (B. S.: Bilkent 2006); H. Ilker Ocakli (B.S.: Bilkent 2006); Gokhan Hatipoglu (B.S.: Koc 2007) Alumni: O. Sardan (B.S.: METU 2004, M.S.: Koc 2006), currently: Ph.D. student in the Department of Micro and Nanotechnology, Danmarks Tekniske Universitet. K. Bugra Toga (B.S.: Koc 2005, M.S.: Koc 2008), currently: Ph.D. student in the Department of Polymer Science and Engineering, University of Massachusetts Amherst. Mehmet Yilmaz (B.S.: IYTE 2005, M.S.: Koc 2007), currently: Ph.D. student in the Department of Mechanical Engineering, Columbia University.

3 Çağatay Başdoğan Ph.D. in Mechanical Engineering, Southern Methodist University, Web page: Students in my laboratory gain an interdisciplinary research experience in the areas of Robotics, Mechatronics, Control Systems, Biomechanics, Biomedical Engineering Computer Graphics, Virtual Reality Technology. Work Experience: NWU Research Park ( ), MIT ( ), NASA-JPL/Caltech ( ) The research activities at Robotics and Mechatronics Laboratory (RML) are mainly focused on man-machine interactions (in particular, haptics: sense of touch) in real and virtual worlds. We conduct highly interdisciplinary research at the intersection of mechanical engineering and computer science with applications in different fields. The students working in the RML accumulate knowledge and experience in the areas of electro-mechanical systems, sensors and actuators, control engineering, robotics, physics-based modeling, computer graphics, and virtual environments technology. Characterization of soft tissue properties using a robotic indentor New control algorithms for nano-scanning using a piezo-actuated probe Mechatronics design and development of an experimental set-up for nano-robotics Haptic tele-manipulation of micro-scale objects using optical tweezers Alumni: Graduate: Mert Sedef (now at UNC Chapel Hill), Nesra Yannier (now at Stanford), Aydın Varol (now at EPFL), Evren Samur (now at EPFL), Erk Subası (now at ETH), Ihsan Gunev (now at Ford Motor Company, R&D), Ibrahim Bukusoglu, Undergraduate: Ali Sengul (now at ETH), A. Cengiz Oztireli (now at ETH), Sertac Karaman (from ITU, now at MIT)

4 İpek Başdoğan Ph.D.in Mechanical Engineering University of Illinois at Chicago, Web page: Modeling and design of micro/macro systems Dynamics and structural analysis Vibration isolation and vibro-acoustic interactions Vibration testing and experimental analysis Work Experience: Argonne National Lab. ( ), Jet Propulsion Lab., NASA-Caltech ( ) Design and Vibration Lab (DVL) at Koc University, has facilities for the measurement and analysis of the vibrational properties of a wide range of mechanical structures and systems. Our team members work on research projects for government, private and industrial sponsors in dynamic characterization and design of micro electro mechanical systems and large scale systems such as automotive parts. The State-of-the-art equipment, instrumentation, and computational facilities available in the laboratory include: Dataphysics SignalCalc Mobilyzer (15 channel) data acquisition system Two Polytec Laser Doppler Vibrometers (PDV 100 and OFV 505) Polytec Fiber-Optic Interferometer (OFV-551 ) and the controller (OFV 5000) PCB accelerometers and hammer kit. Dataphysics vibration system Out-of-plane and in-plane vibration measurement system for micro systems Multiple pc platforms Available software includes: Matlab, ANSYS (Finite Element Modeling Software), ME Scope (Modal Analysis Software), LMS-Sysnoise (Vibro-Acoustic Simulation Software), Labview, and etc. Vibration measurement system for large scale systems In-plane & out-of-plane vibration measurement system for micro systems Dynamic characterization MEMS of Dynamic characterization of automobile parts Current Research Projects Development of a Design Methodology for Microelectromechanical Systems. Sponsor: Network of Excellence on Micro-Optics European FP6 Program and TUBITAK Nonlinear and Linear Modeling of Weatherstrip Seal and Investigation of its Effects in Vehicle Vibrations. Sponsor: Ford Motor Company Development of a Model Validation Methodology for the Design of Micro Systems. Sponsor: Network of Excellence on Micro-Optics European FP6 Program and TUBITAK In-plane Vibration Measurements of Micro Scale Devices Using Sub-Pixel Image Registration Algorithms and Stroboscopic Illumination. Sponsor: Network of Excellence on Micro-Optics European FP6 Program and TUBITAK Reduction of the Sound Pressure in Passenger Cabin of Automobiles Using Various Vibration Control Techniques. Sponsor: Ford Motor Company Current graduate students: Tolga Buyukyazi (BS: Bogazici, 2004), Gulsen Kamci (BS: ITU, 2006), Ilgar Veryeri (BS: METU, 2006). Alumni: F. Can Meral (Ph.D. Candidate, University of Illinois at Chicago, USA), Ozan Anac (Ph.D. Candidate, University of California at Irvine, USA), Emre Dikmen (Ph.D. Candidate, University of Twente, Netherlands).

5 Demircan Canadinç Ph.D. in Mechanical Engineering, University of Illinois at Urbana-Champaign, Web page: home.ku.edu.tr/~dcanadinc Materials behavior Multi-scale experimental and computational mechanics of materials Engineering mechanics (elasticity, fatigue, plasticity) Diffusionless phase transformations in metallic alloys Shape memory alloys Biomaterials, ultrafine-grained materials and high-strength steels Recent Publications: 1. T. Niendorf, H.J. Maier, D. Canadinc, I. Karaman: On the Cyclic Stability and Fatigue Performance of Ultrafine-grained Interstitial-free Steel under Mean Stress Key Engineering Materials 2008; vol : pp T. Niendorf, H.J. Maier, D. Canadinc, G.G. Yapici, I. Karaman: Improvement of the Fatigue Performance of an Ultrafine-grained Nb-Zr Alloy by Nanosized Precipitates Formed by Internal Oxidation Scripta Materialia 2008; vol. 58: pp T. Niendorf, D. Canadinc, H.J. Maier, I. Karaman: The Role of Heat Treatment on the Cyclic Stress-Strain Response of Ultrafine-grained Interstitial-free Steel International Journal of Fatigue 2008; vol. 30: pp D. Canadinc, H.J. Maier, M. Haouaoui, I. Karaman: On the Cyclic Stability of Nanocrystalline Copper Obtained by Powder Consolidation at Room Temperature Scripta Materialia 2007; vol. 58: pp T. Niendorf, D. Canadinc, H.J. Maier, I. Karaman, G.G. Yapici: Microstructure Mechanical Property Relationships in Ultrafine-grained NbZr Acta Materialia 2007; vol. 55: pp T. Niendorf, D. Canadinc, H.J. Maier, I. Karaman: On the Microstructural Stability of Ultrafine-grained Interstitial-free Steel under Cyclic Loading Metallurgical and Materials Transactions A 2007; vol. 38: pp P. Gabor, D. Canadinc, H.J. Maier, R.J. Hellmig, Z. Zuberova, Y. Estrin: The Influence of Zirconium on the Low-Cycle Fatigue Response of Ultrafine-Grained Copper Metallurgical and Materials Transactions A 2007; vol. 38: pp Experimental and computational fatigue of Ultrafine-grained steels 3-dimensional finite element analysis of rolling contact fatigue Development of new shape memory alloys for biomedical applications Diffusionless phase transformations in metallic alloys and shape memory alloys Visco-plastic self-consistent modeling of heavy plastic deformation in nitrogen-alloyed Hadfield manganese steels Negative strain rate sensitivity in Hadfield steel polycrystals

6 İsmail Lazoğlu Ph.D. in Mech. Engineering, Georgia Institute of Technology, Web page: Automation and Mechatronics High Precision Manufacturing Processes and Systems Computer Aided Design, Engineering, Manufacturing and Control (CAD /CAE /CAM /CNC) Industrial Robotics, Reverse Engineering and Rapid Prototyping System Dynamics and Control Bio-Mechanics, Developments of Artificial Organs and Medical Assist Systems Facilities: In the Manufacturing Automation and Research Center (MARC) at Koc University, multi-disciplinary theoretical and experimental researches are performed in a wide spectrum of engineering. In MARC, research facilities includes; Machine Tools: Mazak FJV200 Ultra High Speed, High Precision CNC Machining Center; Mazak Nexus Turning Center. Sensors, Actuators, Measurements and Control Systems: High speed data acquisition systems; 3 Axis Dynamometer; Laser Dynamic Position and Velocity Sensors; Optic Microscope; Vibration and Modal Analysis Systems; Various force, temperature, pressure, flow, position sensors; LabView ; Real time controllers; Programmable Logic Controllers (PLC); Various stepping and servo motors; High precision infra-red thermal measurement system Inspection Equipment 3D Coordinate Measurement Machine (CMM); Mitutoyo Surface Roughness Measurement System Software: Unigraphics NX5 CAD/CAM Package; CATIA V5; PRO/Engineer CAD/CAM; ANSYS; LabView; CutPro; MARCut. Recent Publications: 1. Kaymakci, M.., Lazoglu, I., "Tool Path Selection Strategies For Complex Sculptured Surface Machining", Machining Science and Technology, An International Journal, Taylor & Francis Group, Vol. 12, Issue 1, pp , Dinc, C., Lazoglu, I., Serpenguzel, A., "Analysis of Thermal Fields in Orthogonal Machining with Infrared Imaging", Journal of Material Processing Technology, Elsevier Science Ltd., Vol. 198, pp , Lazoglu, I., Kratz.H., Buyukhatipoglu, K., Klocke, F., "Forces and Temperatures in Hard Turning", Machining Science and Technology, An International Journal, Taylor & Francis Group, Vol.10, No:2, pp , Optimization of New Automotive Engine Production. Funded by RENAULT Development of a High Precision Robot with Parallel Kinematics for Micro Machining of Free Form Surfaces. Funded by the Scientific and Technical Research Council of Turkey (TUBITAK) An Investigation on the Impact Fatigue Characteristics of Compressor Valve Leaves. Funded by the Ministry of Industry and Trade, and Arcelik A.S.. Process Modeling and Optimization of High Speed Production Systems. Funded by the Young Scientists Career Program of the TUBITAK Residual Stress Analysis in Jet Engine Manufacturing. In collaboration with Pratt & Whitney-Canada. Feedrate Scheduling in 3D Free-form Machining. In collaboration with ModuleWorks GmbH, Germany. Bio-Mechanics of femur bone fracture. with Yeditepe University Hospital. Development of a new Implantable and Miniature Left Ventricular Heart Assist System. Funded by the TUBITAK and in collaboration with Yeditepe University Hospital. Grants: Optimization of New Automotive Engine Production. Funded by RENAULT, Development of a High Precision Robot with Parallel Kinematics for Micro Machining of Free Form Surfaces. TUBITAK, MAG, An Investigation on the Impact Fatigue Characteristics of Compressor Valve Leaves. Funded by the Ministry of Industry and Trade, and Arcelik A.S., Development of a new Implantable and Miniature Left Ventricular Heart Assist System. Funded by the TUBITAK and in collaboration with Yeditepe University Hospital., TUBITAK, MAG Project No: 106M309, Rapid prototyping, Process Modeling and Optimization of Computer Controlled High Speed Production Systems. Funded by the Young Scientists Career Program of the TUBITAK, Project No 104M287 Thermal Analysis of CNC Machining Processes with Infra-red Camera. Funded by TUBITAK, Project No: 101M043. Thermal, Mechanical and Dynamic Analysis of Hard Turning Process. In collaborations with Technical University of Aachen, Germany, Renault-Nissan Company from France and Seco Tools AB from Sweden.- Supported partly by the Research Scholarship Program of the Deutscher Akademischer Austauschdienst (DAAD) for Foreign Scientists. Modeling Mechanics and Dynamics of Drilling Proces. Developing process models for improving productivity and hole quality in the manufacturing of refrigerator compressor pistons. Funded by Arcelik A.S, Current Graduate Students: A. Can Altunlu (İTÜ, 2007), Emre Bıyıklı, Enis Akgün, Fazlı Nalcı (Koc Univ., 2007), A. Canberk Manav (Koc Univ., 2006), Erdem Cerit (Yeditepe, 2006), Çınar Erşanlı (Marmara, 2006),. Alumni: Birhan U. Güzel (Bogazici, 2001), Kıvılcım Büyükhatipoğlu (METU 2002), Müge Pirtini (ITU 2002), Davut Otar (Bogazici U 2002), Hüseyin Erdim (METU 2003), Burak Öztürk (METU 2003), Cenk Dinç (ITU 2004), Murat Ötkur (ITU 2004), Durul Ulutan, Gökhan Yıldız, Mustafa Kaymakcı, Onur Demir (Koc Univ., 2005).

7 Metin Muradoğlu Ph.D. in Mechanical & Aerospace Eng, Cornell University, Web page: Micro/biofluidics Multiphase/multifluid flows Turbulent combustion Computational fluid dynamics (CFD) In our research, we specialize in fluid mechanics, combustion and scientific computing. We re primarily concerned with the accurate modeling and computation of dispersed multiphase flows applied to or inspired by micro/biofluidic systems and turbulent flows with and without chemical reactions. Recent Publications: 1. M. Muradoglu, G. Axel and H.A. Stone, A Computational Study of Axial Dispersion in Segmented Gas-Liquid Flow, Physics Fluids, (accepted), (2007). 2. M. Muradoglu and H.A. Stone, Motion of Large Bubbles in Curved Channels, J. Fluid Mech., (2007) 3. Buoyancy-Driven Motion and Breakup of Viscous Drops in Constricted Capillaries, Int. J. Multiphase Flow, (2006) 4. An Auxiliary Grid Method for Computations of Multiphase Flows in Complex Geometries, J. Comp. Physics, (2006). Printing biological tissues by picoliter droplets Modeling of soluble surfactants in microchannels Computational modeling of physics of droplets PDF modeling of swirling flames PDF modeling of local extinction and reignition in turbulent flames Emusification by flow focusing (left exp. and right simulation) Mixing by bubbles in a curved microchannel (Muradoglu and Stone 2005) Bluff-body flame Grants: Mikro Labaratuvar (Lab-On-A-Chip), Birim Mikro İşlemler ve Bilgisayar Simulasyonları, TUBİTAK Grant#MAG-105M043 ( ) Physics of Droplet, COST Action 21 ( ) Current Graduate Students:İsmail Filiz (B.S.: Koc 2006); Savaş Taşoğlu (B.S.: METU 2006); Mert Gür (B.S.: METU 2006). Alumni: A. Doruk Kayaalp, Murat Soydan, Ufuk Olgac, Emrah Gölbaşı, Satayef Kassabbashi, Özkan Eren Collaborators: Prof. Howard A. Stone (Harvard University), Prof. Axel Günter (University of Toronto), Prof. Utkan Demirci (Harvard University), Prof. Gretar Tryggvason (WPI).

8 Mehmet Sayar PhD. in Materials Science and Engineering, Northwestern University, Web: Computational materials science Polymer physics Polyelectrolytes Mechanics of single molecules Biologically inspired materials Liquid crystals Imagine that you need to design a machine which will work at a length scale of 10-9 meters. This machine will be invisible to the naked-eye, it has to obtain it's energy from the environment, and it has to be assembled either by itself or by similar nano-machines. At such a small length scale single molecules will constitute your structural components, and the only way to glue or weld your machine components together will be molecular bonds/forces. Even though it sounds incredibly complex, we are surrounded by such machines. From single-cell organisms to human-beings all living creatures depend on the proper functioning of such molecular machines. My research is focused on understanding the mechanics and dynamics of such machines and also the properties of materials that are needed to construct them. By using computer simulations, I try to understand the basic design principles for nano-materials/nano-machines. As an example, the DNA molecule which carries our genetic code is packed in our cells, which has a much smaller diameter compared to the Fig 1: Aggregation of DNA-like extremely large length of the molecules into cylindrical bundles molecule. Not only this molecule has to be packed into such a small space, one has to also design a mechanism such that the genetic information can be accessed easily. Nature achieves this by using a delicate balance of molecular forces. By performing computer simulations of assembly of DNA-like molecules (Fig. 1) one can understand the basic mechanism, and implement/improve this knowledge to design new smart materials or machines. Another example comes from the biologically inspired materials. One way to create new materials is to couple biological building blocks (aminoacids, nucleotides, etc.) with synthetic ones (e.g. polyethylene). Such Fig 2: Self-assembled hierarchical networks molecules enable us to design functional materials, as well as help us to understand how the Nature works. By designing an amphiphile composed of a short peptide sequence and a short alkyl chain, scientists in Samuel Stupp's group have demonstrated the formation of a hierarchical network structure. By computer simulations we have studied the formation of such networks to tailor design the building blocks for specific applications. Bubble formation in DNA molecule (collaboration with Dr. Kabakcioglu), DNA-based hydrogels, Bundle formation in stiff polyelectrolyte systems, Agent based modeling of dynamical systems (collaboration with Canan Atilgan and Ali Rana Atilgan). Grants: Partner group with Max-Planck Institute for Polymer Research, Mainz/Germany ( ), Tubitak Career Award ( ). Current Grad Students: Özge Engin (ITU 2005), Barış Avşaroğlu (ITU 2006).

9 E. Murat Sozer Ph.D. in Mechanical Engineering, University of Delaware, Web page: Manufacturing of composite materials; Process modeling in composites manufacturing; Resin Transfer Molding (RTM) and Vacuum Assisted RTM (VARTM) processes; Strategic control for automation of composites manufacturing processes; Nonlinear unsteady free-surface flows with Vortex Sheet Method. Facilities: Composite Materials Manufacturing Lab (CMML) focuses on RTM and VARTM processes which are used to manufacture fiber-reinforced polymers (FRP). RTM is commonly used in aerospace, marine and automotive industries. The parts can be manufactured with high specific strength, low dimensional tolerances and good surface finish. In this process, a fabric preform is placed in a mold cavity; and a thermoset polymer is injected into the mold cavity. By using a control system, the variations in the process are detected during the mold filling stage, and control actions are taken to influence the flow pattern so that the mold cavity is filled completely. Different sensor systems were used in our projects: thermocouples, pressure transducers, point- and lineal-voltage sensors. Our lab is equipped with two flow-rate controlled RTM injection machines (Radius Eng.), molds, DAQ system (National Instruments), mold filling simulation program (LIMS, Univ. of Delaware), CFD program: FLUENT, sensors, and a vacuum pump. Recent Publications: 1. Tuncol G., Danisman M., Kaynar A. ve Sozer E.M., Constraints on Monitoring Resin Flow in the Resin Transfer Molding (RTM) Process by Using Thermocouple Sensors, Composites Part A, 38(5), , (2007). 2. Danisman M., Tuncol G., Kaynar A. and Sozer E.M., Monitoring of Resin Flow in the Resin Transfer Molding (RTM) Process Using Point-Voltage Sensors, Composites Science and Technology, 67(3-4), , (2007). 3. Advani, S. G., and Sozer, E. M., Process Modeling in Composites Manufacturing, Marcel Dekker, Inc., New York, Design and manufacturing of a RTM mold integrated with sensors and DAQ system; Monitoring of part dimensions and control of process parameters in VARTM; Sensor development. RTM MOLD Point-Voltage sensors connected to bolts Plastic ring Thermocouple Insulating plastic tubes Copper rod Cables go to DAQ cards & power supplies Copper tip Multi-function bolt Copper tube Grants: Automated Manufacture of Composite Materials by Solving the Issues of RTM. TUBITAK, MAG Career Project, MAG-104M290, April 2005 September Current Graduate Students: Bekir Yenilmez (BS: METU 2006); Tolga Bayrak (BS: METU 2006). Alumni: Goker Tuncol (BS: METU 2003, MS: Koc 2005, now at Michigan State Univ); Murat Danisman (BS: METU 2004, MS: Koc 2006, now at OTOSAN); Alper Kaynar (BS: Koc 2005); Murat Senan (BS: METU 2005, MS: Koc 2007), Tarkan Guclu (BS: ITU 2005, MS: Koc 2007).