Department of Aerospace Engineering

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Recent Submissions

Bioinspired soft-hard interfaces fabricated by multi-material additive manufacturing: A fracture mechanics investigation using essential work of fracture ALTUNTAŞ, UMUT; Çöker, Demirkan; Yavas, Denizhan (2024-08-01) This study employs the Essential Work of Fracture (EWF) concept to evaluate the interfacial fracture toughness of bioinspired interfaces between soft and hard polymer phases. The experimental framework utilizes a model mat...
Effect of flame characteristics on an isolated ethanol droplet evaporating through stagnation methane/air flames: An experimental and numerical study Kaya Eyice, Deniz; Karaca, Mehmet; Halter, Fabien; Gökalp, İskender; Chauveau, Christian (2024-07-01) A single ethanol droplet evaporation through laminar methane/air stagnation flame is investigated at lean, stoichiometric and rich conditions experimentally and numerically. For the droplets having initial diameters of 20-...
Experimental investigation of momentum ratio and impingement angle effects on spray characteristics of triplet and pentad injectors Gulmez, Senem; Kahveci, Harika Senem (2024-07-01) A comprehensive experimental investigation is conducted to analyze the effects of momentum ratio and impingement angle on impinging spray characteristics of triplet and pentad injectors by using Phase Doppler Anemometry (P...
Hydroacoustic analysis of tip-vortex cavitation behind a ship propeller Başkan Perçin, Özge; Fiscaletti, Daniele; Elsinga, Gerrit; Van Terwisga, Tom (2024-06-05)
A non-iterative boundary element formulation for nonlinear viscoelasticity Akay, Ahmet Arda; Gürses, Ercan; Göktepe, Serdar (2024-06-01) In this study, we propose a non-iterative boundary element method (BEM) of highly nonlinear viscoelasticity in time domain. The computationally attractive iteration-free algorithmic structure is achieved by the linearizati...
Effect of Induction and Blade Elasticity Modelling on Wind Turbine Rotor Performance Predictions Aryan, Navıd; Öztürk, İldeniz; Putra, Muhammad Juanda; Sezer Uzol, Nilay; Oğuz, Elif; Greco, Luca (2024-05-27)
Numerical Simulations of Floating Offshore Wind Turbines using Open-Source Codes on HPC Putra, Muhammad Juanda; Sezer Uzol, Nilay; Uçar, Muhammed; Oğuz, Elif (2024-05-15) In the present study, the numerical modeling and simulations of a Floating Offshore Wind Turbine (FOWT) are presented. The analyses are carried out utilizing a variety of open-source codes and run on a High-Performance C...
Investigation of failure mechanisms in dual-phase steels through cohesive zone modeling and crystal plasticity frameworks Aydiner, Ilbilge Umay; Tatlı, Berkehan; Yalçinkaya, Tuncay (2024-03-01) Dual-phase (DP) steels are characterized by their good formability and interesting material properties, which primarily originate from their unique composition, combining the ductile ferrite phase with the hard martensite ...
Comparison of Linear and Nonlinear Twist Extrusion Processes with Crystal Plasticity Finite Element Analysis Şimşek, Ülke; Davut, Kemal; Miyamoto, Hiroyuki; Yalçınkaya, Tuncay (2024-03-01) The mechanical characteristics of polycrystalline metallic materials are influenced significantly by various microstructural parameters, one of which is the grain size. Specifically, the strength and the toughness of polyc...
High Aspect Ratio Composite Wings: Geometrically Nonlinear Aeroelasticity, Multi-Disciplinary Design Optimization, Manufacturing, and Experimental Testing Farsadi, Touraj; Ahmadi, Majid; Şahin, Melin; Haddad Khodaparast, Hamed; Kayran, Altan; Friswell, Michael I. (2024-03-01) In the field of aerospace engineering, the design and manufacturing of high aspect ratio composite wings has become a focal point of innovation and efficiency. These long, slender wings, constructed with advanced materials...
Improving the Load Carrying Capacity of Highly Tapered Laminates Ergin, Fırat; Kayran, Altan (2024-02-08) Kat düşme bölgelerindeki artan gerilimler, katman ayrılmasına neden olur ve çok sayıda katın kısa mesafede sonlandırıldığı kompozit parçaların mukavemetini azaltır. Bu çalışmada, yüksek oranda konikleştirilmiş lamine kompo...
Phase field modeling of fatigue crack growth retardation under single cycle overloads Waseem, Sarim; Erdoğan, Can; Yalçınkaya, Tuncay (2024-02-01) A zone-based crack retardation model that responds to single cycle overloads is applied to a phase field fatigue framework. Fatigue crack growth is incorporated through the degradation of fracture toughness in the phase fi...
High-fidelity simulations of low-velocity impact induced matrix cracking and dynamic delamination progression in CFRP beams Batmaz, Onur Ali; Bozkurt, Mirac Onur; Gürses, Ercan; Çöker, Demirkan (2024-02-01) A high-fidelity finite element model is constructed to simulate the low-velocity line-impact experiments conducted by Bozkurt and Coker on [05/903]s CFRP beams. The simulations utilize a user-implemented three-dimensional ...
Aerodynamic Measurements and Benefit Quantification of a Boundary Layer Ingested Propulsion System Bilyaz, İbrahim Soner; Başkan Perçin, Özge (2024-01-04)
High-speed observation of dynamic delamination failure in tapered composite laminates under tensile loading Bozkurt, Mirac Onur; ÖZEN, EMİNE BURÇİN; Yavuz, Burak Ogun; Parnas, Kemal Levend; Çöker, Demirkan (2024-01-01) This article presents high-fidelity observations of the time evolution of unstable delamination growth in tapered composite beams under tensile loading via ultra-high-speed camera in conjunction with digital image correlat...
Bioinspired Interfaces for Improved Interlaminar Shear Strength in 3D Printed Multi-material Polymer Composites ALTUNTAŞ, UMUT; Çöker, Demirkan; Yavas, Denizhan (2024-01-01) Additively manufactured soft-hard composite materials are significant because they combine the benefits of both soft and hard materials, creating a new class of materials with unique properties. The interfaces between the ...
Adjoint based aerodynamic shape optimization of a semi-submerged inlet duct and upstream inlet surface Küçük, Umut Can; Tuncer, İsmail Hakkı (2024-01-01) Aerodynamic performance of a semi-submerged inlet exposed to a significant amount of boundary layer ingestion is optimized using the open-source flow and adjoint solver SU2. Pressure recovery is taken as the objective func...
Distributed Robust Formation Control of Heterogeneous Multi-UAVs with Disturbance Rejection Imran, Imil Hamda; Kurtuluş, Dilek Funda; Memon, Azhar M.; Goli, Srikanth; Kouser, Taiba; Alhems, Luai Muhammad (2024-01-01) This paper investigates the formation control of multiple heterogeneous quadrotor unmanned aerial vehicles (UAVs). The research focuses on developing a distributed robust formation control strategy to effectively manage th...
A Dual Quaternion Based Visual Odometry Method for a Lunar Lander Uzun, Semra Sultan; Söken, Halil Ersin (2024-01-01) Visual sensors have a major advantage over traditional sensing methods for navigation in unknown environments since they provide rich information about the environment. However, they do not offer direct navigation measurem...
Fault-tolerant ADCS for Small Satellites Using Bayesian Networks Yildirim, Cansu; Söken, Halil Ersin (2024-01-01) The Attitude Determination and Control System (ADCS) in satellites uses different modes to estimate and control attitude during various mission phases. This study presents an ADCS design for an Earth-observing small satell...

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