Browsing Mechanical Engineering by Author "Özyeğin University"
Now showing items 21-40 of 459
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Application of a novel friction stir spot welding process on dissimilar aluminum joints
Bajilane, Isam Jabbar Ibrahim; Yapıcı, Güney Güven (Elsevier, 2018-10)Intermediate layer friction stir spot welding (IL-FSSW) is introduced in this study as a novel spot welding technique to eliminate the keyhole associated with the conventional friction stir spot welding (FSSW). This process ... -
Application of chemical mechanical polishing process on titanium based implants
Özdemir, Zeynep; Ozdemir, A.; Başım, Gül Bahar (Elsevier, 2016-11-01)Modification of the implantable biomaterial surfaces is known to improve the biocompatibility of metallic implants. Particularly, treatments such as etching, sand-blasting or laser treatment are commonly studied to understand ... -
Application of friction stir spot welding on additive manufactured carbon fiber composite
Raza, Muhammad Farhan; Yapıcı, Güney Güven (Trans Tech Publications Ltd, 2022)Friction stir spot welding as a solid state processing technique is used to join dissimilar and similar metals, composites and polymers. This study illustrates the implementation of friction stir spot welding (FSSW) on ... -
Application of giesekus model for capillary extrusion of rubber compound
Talib, Nayyef Ahmed; Ertunç, Özgür (The Society of Chemical Engineers, 2019-02)Extrudate swell is an important phenomenon occurring when high viscoelastic materials, such as rubber and rubber compounds, are extruded. In this work, the effects of relaxation time and relaxation mode on swell predictions ... -
Application of novel constrained groove pressing routes on austenitic stainless steel
Özdemir, Zeynep Güler; Yapıcı, Güney Güven (Springer, 2021-11)In this study, a novel set of constrained groove processing routes was put forward especially to underline the variation of strain paths. Namely, 304 stainless steel sheets were processed by five distinctly specified ... -
Assessments on the improved modelling for pneumatic artificial muscle actuators
Peternel, L.; Uğurlu, Regaip Barkan; Babic, J.; Morimoto, J. (IEEE, 2015)In this paper, we present an analysis regarding the pneumatic air muscle modelling, with a particular emphasis on the exoskeleton robot control. We propose two calibration approaches for obtaining the model identification ... -
Automated flow rate control of extrusion for 3D concrete printing incorporating rheological parameters
Ahi, Oğulcan; Ertunç, Özgür; Bundur, Zeynep Başaran; Bebek, Özkan (Elsevier, 2024-04)The use of inline quality assessment technologies is of great importance in meeting the consistent extrusion requirements of 3D concrete printing (3DCP) applications. This paper presents a system to regulate extrusion speed ... -
Benchmark study of 2D and 3D VOF simulations of a simplex nozzle using a hybrid RANS-LES approach
Bal, M.; Kayansalçik, Gökhan; Ertunç, Özgür; Erhan Böke, Y. (Elsevier, 2022-07-01)In this study, a simplex nozzle is tested with water for the benchmarking of different flow simulation models. A large scale Plexi-glass transparent nozzle is used to reduce the influence of production tolerances on the ... -
Benchmarking torque control strategies for a torsion-based series elastic actuator
Uğurlu, Regaip Barkan; Sarıyıldız, E.; Kansızoğlu, Ahmet Talha; Özçınar, Erim Can; Coruk, Sinan (IEEE, 2022-06)The diversity in torque-controlled actuators has enabled researchers to address numerous physical human-robot interaction applications with enhanced safety, dependability, and interaction capability [1]. Yet, only a few ... -
Biomaterials applications of chemical mechanical polishing
Başım, Gül Bahar; Özdemir, Zeynep; Mutlu, Ö. (IEEE, 2012)Chemical Mechanical Polishing (CMP) is used in semiconductor industry to enable planarization of the interlayer dielectrics and metals. In this study, CMP is used as a polishing technique to modify the surface roughness ... -
A biomimicry design for nanoscale radiative cooling applications inspired by Morpho didius butterfly
Didari, Azadeh; Mengüç, Mustafa Pınar (Nature Publishing Group, 2018-11-15)In nature, novel colors and patterns have evolved in various species for survival, recognizability or mating purposes. Investigations of the morphology of various butterfly wings have shown that in addition to the pigmentation, ... -
Biomimicry designs for passive optical solutions for nanoscale radiative cooling applications
Didari, Azadeh; Mengüç, Mustafa Pınar (SPIE, 2018)Inspired by the mechanism of the wings of Morpho butterfly, here we propose biomimicry designs which have the potential to be used for radiative cooling purposes. We numerically analyzed the spontaneous emission at near-field ... -
Boiling heat transfer enhancement of magnetically actuated nanofluids
Şeşen, M.; Tekşen, Y.; Şahin, B.; Şendur, K.; Mengüç, Mustafa Pınar; Koşar, A. (AIP, 2013)Nanofluids offer a potential breakthrough as next-generation heat transfer fluids since they offer exciting new possibilities to enhance heat transfer performance compared to pure liquids. A major drawback for using ... -
A Cahn-Hilliard modeling of metal oxide thin films for advanced CMP applications
Karagöz, Ayşe; Şengül, Yasemin; Başım, Gül Bahar (ECS, 2014)Chemical mechanical planarization (CMP) process enables topographic selectivity through formation of a protective oxide thin film on the recessed locations of the deposited metal layer, while a continuous chemical oxidation ... -
Calibration of 2D ultrasound in 3D space for robotic biopsies
Ahmad, A.; Çavuşoğlu, M. C.; Bebek, Özkan (IEEE, 2015)Freehand Ultrasound technique is widely used in intraoperative biopsy procedures for detecting the volumes of interest. Freehand ultrasound probe is faster and flexible with 6 degrees of freedom. Thats why the imaging ... -
The cauchy problem for a one-dimensional nonlinear elastic peridynamic model
Erbay, Hüsnü Ata; Erkip, A.; Muslu, G. M. (Elsevier, 2012-04-15)This paper studies the Cauchy problem for a one-dimensional nonlinear peridynamic model describing the dynamic response of an infinitely long elastic bar. The issues of local well-posedness and smoothness of the solutions ... -
Centroidal momentum observer: Towards whole-body robust control of legged robots subject to uncertainties
Oral, Dilay Yesildağ; Barkana, D. E.; Uğurlu, Regaip Barkan (IEEE, 2022)This paper aims to provide robust dynamic motion control and eliminate parameter uncertainty in single-legged robots with a centroidal momentum-based control algorithm. In order to ensure the continuity of the movement ... -
Challenges and solutions for application and wider adoption of wearable robots
Babič, J.; Laffranchi, M.; Tessari, F.; Verstraten, T.; Novak, D.; Šarabon, N.; Uğurlu, Regaip Barkan; Peternel, L.; Torricelli, D.; Veneman, J. F. (Cambridge University Press, 2021)The science and technology of wearable robots are steadily advancing, and the use of such robots in our everyday life appears to be within reach. Nevertheless, widespread adoption of wearable robots should not be taken for ... -
Challenges for radiative transfer 1: towards the effective solution of conjugate heat transfer problems
Howell, J. R.; Mengüç, Mustafa Pınar (Elsevier, 2018-12)This paper lists crucial challenges in radiative transfer with the objective of gathering information on improving and choosing methods for solving conjugate heat transfer problems. Developments in computational and ... -
Characteristics of low reynolds number steady air jet impingement heat transfer over vertical flat surfaces
He, X.; Lustbader, J. A.; Arık, Mehmet; Sharma, R. (IEEE, 2012)In this paper, heat transfer characteristics of single-slot steady-impinging air jets on a 25.4 mm × 25.4 mm vertical surface were experimentally investigated. The experiments were conducted with four different nozzles ...
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