Department of Mechanical Engineering

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Recent Submissions

Performance improvement in a vertical latent thermal energy storage tank with crossing heat transfer tubes Baghaei Oskouei, Seyedmohsen; Bayer, Özgür (2024-05-30) In a vertical latent thermal energy storage (LTES) tank, the lack of natural convection and domination of conduction results in a slow charging rate. On the other hand, due to large thermal resistances between the cold sur...
Simulation of crack closure effect on cracked beam vibrations Günhan, Dağhan; Acar, Bülent; Kadıoğlu, Fevzi Suat (2024-05-02) Vibrations of beams containing cracks are usually investigated by using open or breathing crack models. Neither one of these approaches considers the plasticity induced crack closure (PICC) phenomena which occurs in fatigu...
Effect of impinging flow on hydrothermal characteristics of a pipe-network mini channel heatsink Salamatbakhsh, Elyas; Bayer, Özgür; SOLMAZ, İsmail (2024-05-01) In the current work, a lattice-structured mini channel heatsink is subjected to an impinging flow (IF) in which the flow enters from the top and exits from the lateral sides. An experimental setup is built, and numerical s...
Investigation of the translaminar fracture behavior of the fiber-reinforced composites stitched perpendicular to their plane Asan, Ahmet Murat; Kaman, Mete Onur; Dağ, Serkan; Erdem, Serkan; Turan, Kadir (2024-05-01) To increase the fracture toughness, the two-dimensional laminated textiles can be stitched with fibers throughout their thickness. But the stitch properties effect the mechanical behavior of the composite plates. Because o...
Comparative Analysis of Solar Tower and Parabolic Trough Systems for Solar Heat in a Steel Industry Değirmenci, Deniz; Güner, Levent; Taylan, Onur; Inceoğlu, Didem Nedret; Sakallı, Server; Ünal, Erdal (2024-04-10) Concentrated Solar Thermal (CST) systems emerge as a promising alternative to replace fossil fuels used in industrial thermal processes due to their high energy density and dispatchability. In this study, a comparative ana...
Effect of nanoheterogeneities on the fracture toughness and tensile ductility of CuTa metallic glass thin films Behboud, Ali B.; Fadaie, Amir; Motallebzadeh, Amir; ŞEHİRLİ, SERVET; Özerinç, Sezer (2024-04-05) Nanoheterogenenous metallic glasses (MG) can offer improved ductility through a nanoscale modulation in their mechanical properties. However, the relationship between the modulation parameters and the mechanical behavior i...
Biochar gasification: Insights from pyrolysis atmospheres and gasification heating rates Akgül, Alican; Akın, Süleyman Şener; Güleç, Fatih; Kazanç Özerinç, Feyza (2024-03-15) Gasification is a promising technology for the synthesis of syngas and hydrogen, with char reactivity being a pivotal factor in the design of industrial gasifiers. Despite extensive studies on the gasification characterist...
Fracture toughness of AlTiN coatings investigated by nanoindentation and microcantilever bending Kaygusuz, Burçin; Motallebzadeh, Amir; Karadayı, Özcan; Kazmanlı, Muhammet Kürşat; Özerinç, Sezer (2024-02-15) Metal nitride coatings are increasingly used in MEMS applications. The brittle nature of these coatings makes fracture one of the main failure mechanisms during operation. Therefore, quantifying the fracture toughness of n...
A Novel Approach for Local Structural Modification of Nonlinear Structures Ceren Ekinci, E.; Bülent Özer, M.; Özgüven, Hasan Nevzat (2024-01-01) Structural modification methods provide powerful tools to calculate the dynamic behavior of a modified structure from that of the original one. In general, either the modal properties or responses of the original structure...
A Non-retracted Path Generation Algorithm for Material Extrusion Type of Additive Manufacturing Ozcan, Melih; Hergul, Yigit; Yaman, Ulaş (2024-01-01) Path planning algorithms are utilized in various fields to improve the efficiency of the defined tasks. Regarding extrusion based additive manufacturing (AM) technologies, an optimized path performs the same task in less t...
Humanized brain organoids-on-chip integrated with sensors for screening neuronal activity and neurotoxicity Saglam-Metiner, Pelin; Yıldırım, Ender; Dincer, Can; Basak, Onur; Yesil-Celiktas, Ozlem (2024-01-01) The complex structure and function of the human central nervous system that develops from the neural tube made in vitro modeling quite challenging until the discovery of brain organoids. Human-induced pluripotent stem cell...
Four-Bar Function Generation Using Excel Solver Söylemez, Eres; Kiper, Gökhan (2024-01-01) The Chapter presents a simple and efficient way of approximating a function with a four-bar mechanism using four or five design parameters including one or both of the initial crank angles. The method only involves solutio...
Experimental Modal Analysis of Structures with High Nonlinear Damping by Using Response-Controlled Stepped-Sine Testing Karaağaçlı, Taylan; Özgüven, Hasan Nevzat (2024-01-01) In the last decade, various promising nonlinear modal identification techniques have been developed based on the nonlinear normal mode (NNM) concept. Most of these techniques rely on the phase resonance testing approach wh...
Close-contact melting and natural convection in unconstrained melting: A parametric study Baghaei Oskouei, Seyedmohsen; Li, Zi-Rui; Bayer, Özgür; Fan, Li-Wu (2024-01-01) Close-contact melting (CCM) is a phenomenon that can be achieved in latent thermal energy storage (LTES) units where the falling of solid PCM is realized. On the other hand, natural convection (NC) plays an important role ...
Effect of Structural Parameters on the Nonlinear Vibration of L-Shaped Beams Ekici, Yigitcan; Ciğeroğlu, Ender; Yazıcıoğlu, Yiğit (2024-01-01) In this chapter, nonlinear vibration analysis of L-shaped beams is performed for different structural parameters, and the effects of these parameters are observed. The L-shaped beam is composed of two beams joined end to e...
A rotary extrusion system with a rectangular-orifice nozzle: toward adaptive resolution in material extrusion additive manufacturing Gharehpapagh, Bahar; Dilberoglu, Ugur M.; Yaman, Ulaş; Dolen, Melik (2024-01-01) Material extrusion additive manufacturing (MEAM) has revolutionized the production of complex designs while minimizing the amount of effort required due to its simple production pipeline. However, MEAM naturally comes with...
Predictive search model of flocking for quadcopter swarm in the presence of static and dynamic obstacles Önür, Giray; Turgut, Ali Emre; Şahin, Erol (2024-01-01) One of the main challenges in swarm robotics is to achieve robust and scalable flocking, such that large numbers of robots can move together in a coordinated and cohesive manner while avoiding obstacles or threats. Flockin...
Dual Horizon Peridynamic Approach for Studying the Effect of Porous Media on the Dynamic Crack Growth in Brittle Materials Altay, Ugur; DÖRDÜNCÜ, MEHMET; Kadıoğlu, Fevzi Suat (2024-01-01) This study aims to investigate the effect of the stop-hole configurations on dynamic cracks using the dual-horizon peridynamic approach (DHPD). The traditional PD formulations require uniform discretization for the solutio...
The TRChallenge: Experimental Quantification of Nonlinear Modal Parameters and Confrontation with the Predictions Bhattu, Arati; Jamia, Nidhal; Hermann, Svenja; Müller, Florian; Scheel, Maren; Özgüven, Hasan Nevzat; Schwingshackl, Christoph; Krack, Malte (2024-01-01) In recent years, the prediction of the behavior of structures with high-level nonlinearities has been a challenging area of research. In 2021, the Tribomechadynamics Research Challenge was proposed to evaluate the current ...
Development of a dynamic simulation model for CNC table vibration estimation in milling operations Frezeleme işleminde CNC tabla titreşimlerinin kestirimi için dinamik simülasyon modeli geliştirilmesi Altun, Barış; Çalışkan, Hakan; Özşahin, Orkun (2024-01-01) Recent developments under Industry 4.0 allows to collect and analyze measurements during milling process. For such projects to be done, software needs to be developed. Developing software through testing is expensive and t...

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