Department of Aerospace Engineering, Article

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Çöker, Demirkan (35)
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Yalçınkaya, Tuncay (34)
Söken, Halil Ersin (32)
Kurtuluş, Dilek Funda (30)

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Recent Submissions

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)
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 ...
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...
Experimental study on efficient propulsion system for multicopter UAV design applications
Goli, Srikanth; Kurtuluş, Dilek Funda; Alhems, Luai M.; Memon, Azhar M.; Imran, Imil Hamda (2023-12-01)
The usage of multicopter unmanned aerial vehicles (UAVs) has increased for various military and civilian purposes. The choice of propulsion system of such a vehicle is crucial to fulfill the intended mission requirements. ...
Estimating the pressure force around swimming plankton using micro particle image velocimetry
Ergin, Fahrettin Gokhan; Gunaydinoglu, Erkan; Kurtuluş, Dilek Funda; Wadhwa, Navish (2023-12-01)
Obtaining pressure force for freely swimming microorganisms is a challenging yet important problem. Here, we report the swimming kinematics and dynamics of the zooplankton Acartia tonsa nauplius investigated using Micro Pa...
A numerical ballistic performance investigation of Armox 500T steel through ductile damage models
Göçmen, Yağmur; Erdoğan, Can; Yalçınkaya, Tuncay (2023-11-15)
In this work, the ballistic response of an armor steel, Armox 500T, is numerically investigated through finite element (FE) analysis by utilizing the Johnson–Cook (JC) and modified Mohr–Coulomb (MMC) damage models, with a ...
A Numerical Study on the Ballistic Performance of Projectiles Formed by Shaped Charge
Göçmen, Yağmur; Erdoğan, Can; Yalçınkaya, Tuncay (2023-11-01)
Analog sun sensor measurement correction using deep neural network
Söken, Halil Ersin; Sozen, Semsettin Numan; Gokce, Murat; Yavuzyilmaz, Cagatay; Gulmammadov, Farid (2023-10-01)
Sun sensors are commonly used attitude sensors because of their low cost, mass, volume, and power consumption. Analog Sun sensors (ANSS), which are smaller but usually less accurate than digital ones, are especially prefer...
Ductile failure of Inconel 718 during flow forming process and its numerical investigation
Erdoğan, Can; Vural, Hande; Karakaş, Aptullah; Fenercioğlu, Tevfik Ozan; Yalçınkaya, Tuncay (2023-10-01)
Understanding the fracture mechanisms and predicting failure in forming processes is of great interest to increase formability and numerical methods have been proven effective. Incremental forming processes such as flow fo...
Full envelope nonlinear flight controller design for a novel electric VTOL (eVTOL) air taxi
Suiçmez, E.C.; Kutay, Ali Türker (2023-10-01)
On-demand urban air transportation gains popularity in recent years with the introduction of the electric VTOL (eVTOL) aircraft concept. There is an emerging interest in short/medium range eVTOL air taxi considering the cr...
In-situ observation and numerical study of dynamic delamination in tapered composite laminates
Dashatan, Saeid Hosseinpour; Parnas, Kemal Levend; Çöker, Demirkan; Bozkurt, Mirac Onur; Ozen, Emine Burcin (2023-05-15)
In this study, dynamic delamination behavior in asymmetric GFRP tapered laminates under quasi-static tensile loading is investigated experimentally and numerically. Abaqus/Explicit cohesive interface modeling is utilized t...
Optimization of reward shaping function based on genetic algorithm applied to a cross validated deep deterministic policy gradient in a powered landing guidance problem
Nugroho, Larasmoyo; Andiarti, Rika; Akmeliawati, Rini; Kutay, Ali Türker; Larasati, Diva Kartika; Wijaya, Sastra Kusuma (2023-04-01)
One major capability of a Deep Reinforcement Learning (DRL) agent to control a specific vehicle in an environment without any prior knowledge is decision-making based on a well-designed reward shaping function. An importan...
Leading-Edge Vortex Characteristics of Surging-Translating Flexible Wings
Yazdanpanah, Mahdi ; Perçin, Mustafa (2023-01-31)
This study experimentally investigates the flow fields around rigid and chordwise-flexible wings, performing a rectilinear translational motion starting from rest. A rigid wing and two flexible wings with an intermediate d...
Creating tougher interfaces via suture morphology in 3D-printed multi-material polymer composites by fused filament fabrication
Altuntas, Umut; Çöker, Demirkan; Yavas, Denizhan (2023-01-05)
This study presents a facile strategy for architecting the interface morphology to create tougher and stronger interfaces in additively manufactured multi-material polymer composites. A sutural interfacial morphology betwe...
Unsteady aerodynamic performance of SD7062 airfoil at high Reynolds number
Anilir, Berkan; Kurtuluş, Dilek Funda (2023-01-01)
Aerodynamic performance of SD7062 airfoil in two-dimensional unsteady flows at high Reynolds number (Re approximate to 5 x 10(6)) has been investigated numerically for a wide range of angles of attack. The k-omega SST turb...
Incorporating delayed star tracker measurements in Gokturk-2 satellite attitude filter
Kahraman, Ozgur; Söken, Halil Ersin (2023-01-01)
Star trackers (STRs) are widely used for fine attitude estimation. Due to the processing time for tasks such as star identification, tracking, and attitude solution, a STR can provide the attitude quaternion measurements w...
Insights from 3D modeling and fluid dynamics in COVID-19 pneumonia
GÖKCAN, MUSTAFA KÜRŞAT; Kurtuluş, Dilek Funda; Aypak, Adalet; Köksal, Murathan; Ökten, Sarper R. (2023-01-01)
We address the lack of research regarding aerodynamic events behind respiratory distress at COVID-19. The use of chest CT enables quantification of pneumonia extent; however, there is a paucity of data regarding the impact...
Wake patterns and mode switching at low Reynolds numbers
Naeem, Nabih; Fouda, Mahmoud; Guney, Mertcan; Kurtuluş, Dilek Funda (2023-01-01)
Instantaneous wake structures behind a 2% thick NACA 0002 symmetric airfoil are numerically studied in 2D at six different angles of attack for Reynolds numbers ranging from 100 to 3,000. Classification of the flow pattern...
Pre- and post-stall characteristics of a very light aircraft's wing for different design parameters
Anılır, Berkan; Kurtuluş, Dilek Funda (2023-01-01)
The impact of taper ratio, dihedral angle and wing tip shape on the aerodynamics of a very light aircraft’s wing has been investigated by performing URANS simulations at Reynolds number of 5 × 106 for pre- and post-stall c...
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