Browsing Mechanical Engineering by Author "2"
Now showing items 41-60 of 88
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Force reference extraction via human interaction for a robotic polishing task: Force-induced motion
In this paper, a method to control a manipulator using force-induced trajectory is proposed. The trajectory is learned from an operator doing the polishing task using a tool attached to the robot's end-effector. The learning ... -
Fracture behavior of ultrafine-grained titanium under tension at elevated temperatures
Sajadifar, Seyed Vahid; Maier, H. J.; Yapıcı, Güney Güven (ASME, 2020-10-01)This investigation focused on the deformation response and microstructural changes of severely deformed titanium during post-severe plastic deformation tension, at temperatures of 300–600 °C and at strain rates of 0.001–0.1 ... -
A fundamental approach to electrochemical analyses on chemically modified thin films for barrier CMP optimization
Yagan, Rawana; Başım, Gül Bahar (IOP Publishing, 2019-04-09)Chemical Mechanical Planarization (CMP) process development for 10nm nodes and beyond demands a systematic understanding of atomic-scale chemical and mechanical surface interactions for the control of material removal, ... -
Gabor filter based localization of needles in ultrasound guided robotic interventions
Kaya, Mert; Bebek, Özkan (IEEE, 2014)This paper presents an entropy based parameter tuning method for needle segmentation, and a probability map based needle tip estimation method using Gabor-based line filter. The proposed automatic parameter tuning method ... -
High temperature characteristics of Al2024/SiC metal matrix composite fabricated by friction stir processing
Ghobadlou, Ali Hosseinzadeh; Yapıcı, Güney Güven (Elsevier, 2018-07-25)In the present study, friction stir processing (FSP) is used for the synthesis of an aluminum metal matrix composite (MMC) reinforced by SiC particles. MMC specimens with reinforced microstructures exhibited significant ... -
High temperature deformation behavior of 4340 steel: activation energy calculation and modeling of flow
Sajadifar, Seyed Vahid; Yapıcı, Güney Güven; Ketabchi, M.; Bemanizadeh, B. (Elsevier, 2013-12)The 4340 steel is extensively utilized in several industries including automotive and aerospace for manufacturing a large number of structural components. Due to the importance of thermo-mechanical processing in the ... -
High temperature flow response modeling of ultra-fine grained titanium
Sajadifar, Seyed Vahid; Yapıcı, Güney Güven (MDPI AG, 2015)This work presents the mechanical behavior modeling of commercial purity titanium subjected to severe plastic deformation (SPD) during post-SPD compression, at temperatures of 600-900 °C and at strain rates of 0.001-0.1 ... -
Hot deformation behavior of ultra-fine grained pure Ti
Sajadifar, Seyed Vahid; Yapıcı, Güney Güven (Trans Tech Publications, 2013-11)In the present study, compression tests were performed at a strain rate of 0.001 to 0.1 s(-1) and in the range of 600 degrees C to 900 degrees C to investigate the high temperature deformation behavior and flow stress model ... -
Image registration method for mobile-device-based multispectral optical diagnostics for buildings
Şahin, Cem Doğan; Mengüç, Mustafa Pınar (The Optical Society, 2019-09-10)The recent advances in mobile device hardware and software introduced new opportunities to perform more advanced computation and measurements for buildings. Multispectral optical imaging is a widely recognized technique ... -
Improving selectivity on germanium CMP applications
Karagöz, Ayşe; Başım, Gül Bahar (ECS, 2014)In the presented paper, the adsorption characteristics of cationic and anionic surfactants on germanium and silica were studied in order to improve selectivity in germanium based shallow trench isolation chemical mechanical ... -
Influence of heat treatment parameters on the functional behavior and corrosion performance of a shape memory wire actuator
Şimsek, Görkem Muttalip; Yapıcı, Güney Güven (Trans Tech Publications Ltd, 2020-04)In the present study, the effect of heat treatment parameters on the functional response, corrosion behavior and microstructural evolution of NiTi shape memory alloys were investigated. Various heat treatment regimes were ... -
Influence of turbulent flow characteristics on flame behaviour in diffuser combustors
Nazzal, Ibrahim Thamer; Ertunç, Özgür (Elsevier, 2019-03-01)The influence of turbulence on flame location in a diffuser-type combustor is the focus of this study. Two types of diffuser combustors were selected to study the influence of turbulence intensity and length scale on flame ... -
Integrated engineering and architecture for the energy efficient academic buildings
Mengüç, Mustafa Pınar; Somuncu, Yasemin; Çağlayan, Şahin; Özcan, Saadet; Sefer, Burak; Simitli, Utku (International Building Performance Simulation Association, 2015-12)In this paper, we outline a comprehensive and integrated collaboration between engineering and architecture team to build an energy efficient building. Within the framework of the EU FP7 project, titled NEED4B, we have ... -
An integrated homogenization–based topology optimization via RBF mapping strategies for additively manufactured FGLS and its application to bandgap structures
Şimşek, Uğur; Gayir, C. E.; Kiziltas, G.; Şendur, Polat (Springer Nature, 2020)The manufacturing of lattice structures has been greatly facilitated thanks to the advances in additive manufacturing. Functionally graded lattice (FGL) structures, a major class of such structures, developed using topology ... -
An investigation into flow and heat transfer for a slot impinging synthetic jet
Ghaffari, Omidreza; Solovitz, S. A.; Arık, Mehmet (Elsevier, 2016-09)According to the latest trends in miniature consumer and military electronics, there is a need for compact cooling solutions to meet performance requirements at compact volumes. Successful technology must feature a thin ... -
An investigation into momentum and temperature fields of a meso-scale slot synthetic jet for a small jet-to-surface spacing
Ghaffari, Omidreza; Doğruöz, M. B.; Arık, Mehmet (Begell House Inc., 2014)Impinging synthetic jets have been identified as a promising technology for cooling miniature structures. Recognizing their thermal performance on the target surface requires a fundamental understanding of the momentum ... -
An investigation into performance characteristics of an axial flow Fan using CFD for electronic devices
Hashim, Hafiz Muhammad; Doğruöz, M. B.; Arık, Mehmet; Parlak, M. (ASME, 2015)Rotating fans are widely utilized in thermal management applications and their accurate characterization has recently become even a more critical issue for thermofluids engineers. The present study investigates the ... -
Investigation of combined optical and thermal effects on phosphor converted light-emitting diodes with liquid immersion cooling
Kahvecioğlu, Halil İbrahim; Tamdoğan, E.; Arık, Mehmet (SPIE, 2018)The inclusion of phosphor into a high brightness light-emitting diode (LED) package is a complicated task since LEDs are encapsulated with a phosphor and epoxy mixture to convert blue photons to white light. Moreover, this ... -
An investigation of performance of synthetic jets emanating from circular, elliptical and rectangular nozzles
Işıl, Onuralp; Doğruöz, M. B.; Arık, Mehmet (IEEE, 2018-07-24)Impinging synthetic jets have been considered as a future solution for cooling miniature structures. Synthetic jet performance is sensitive to a number of parameters such as orifice size, orifice shape and nozzle-to-target ... -
Investigation of power distribution on an axial fan
Hashim, Hafiz Muhammad; Yasa, Y.; Dogruoz, M. B.; Arık, Mehmet; Mese, E. (IEEE, 2016)Forced convection cooling systems utilize fans which can be axial or radial, small or large in many different configurations. Efficiency of a fan depends on its electrical and mechanical designs as well as the environmental ...
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