Altan Kayran

E-mail
akayran@metu.edu.tr
Department
Department of Aerospace Engineering
Scopus Author ID
Web of Science Researcher ID
Flutter Optimization of a Wing-Engine System with Passive and Active Control Approaches
Asadi, Davood; Farsadi, Touraj; Kayran, Altan (2021-04-01)
In the present study, the flutter performance of a composite thin-walled beam wing-engine system is optimized by implementing two different control approaches: 1) passive open-loop and 2) active closed-loop control. Sequen...
Flutter study of flapwise bend-twist coupled composite wind turbine blades
Farsadi, Touraj; Kayran, Altan (2021-03-01)
Bending-twisting coupling induced in big composite wind turbine blades is one of the passive control mechanisms which is exploited to mitigate loads incurred due to deformation of the blades. In the present study, flutter ...
Improvement of structural characteristics of composite thin-walled beams using variable stiffness concept via curvilinear fiber placement
Farsadi, Touraj; Bozkurt, Mirac Onur; Çöker, Demirkan; Kayran, Altan (2021-01-01)
© IMechE 2021.This study presents the use of variable stiffness concept via curvilinear fiber placement to achieve improved structural characteristics in composite thin-walled beams (TWBs). The TWB used in the study is con...
Classical flutter analysis of composite wind turbine blades including compressibility
Farsadi, Touraj; Kayran, Altan (Wiley, 2020-08-01)
For wind turbine blades with the increased slenderness ratio, flutter instability may occur at lower wind and rotational speeds. For long blades, at the flutter condition, relative velocities at blade sections away from th...
Reduced order nonlinear aeroelasticity of swept composite wings using compressible indicial unsteady aerodynamics
Farsadi, Touraj; Rahmanian, Mohammad; Kayran, Altan (Elsevier BV, 2020-01-01)
Nonlinear dynamic aeroelasticity of composite wings in compressible flows is investigated. To provide a reasonable model for the problem, the composite wing is modeled as a thin walled beam (TWB) with circumferentially asy...
COMPARATIVE STRUCTURAL OPTIMIZATION STUDY OF COMPOSITE AND ALUMINUM HORIZONTAL TAIL PLANE OF A HELICOPTER
Arpacıoğlu, Bertan; Kayran, Altan (2019-11-11)
This work presents structural optimization studies of aluminum and composite material horizontal tail plane of a helicopter by using MSC. NASTRAN SOL200 optimization capabilities. Structural design process starts from conc...
AEROELASTIC MODELING AND ANALYSIS OF HIGH ASPECT RATIO WINGS WITH DIFFERENT FIDELITY STRUCTURAL MODELS
Çiçek, Gökçen; Kayran, Altan (2019-11-11)
This paper is concerned with the aeroelastic modeling and analysis of high aspect ratio wings with large torsional deflections with different fidelity structural models. The approach for structural modeling presented here...
Multibody Simulation of Helicopter Rotor with Structural Flexibility
Turan, Bali İhsan; Kayran, Altan (2019-10-30)
AN INVESTIGATION ON DEVELOPMENT OF A PREDICTION MODEL FOR FATIGUE LIFE OF OPEN HOLE SPECIMENS WITH DOUBLE THROUGH THE THICKNESS CRACKS USING RESPONSE SURFACE METHODOLOGY
Shabestari, Sohrab Heidari; Kayran, Altan (2019-09-18)
In this study, a model for predicting the life of open hole specimens with a double through the thickness fatigue cracks emanating from the fastener hole walls is suggested. The model predicts the life of 2024-T3 aluminum ...
A Comparison Study On Strength Analysis Of Composite Repair Adhesive Zone By Analytical Methods And Abaqus Cohesive Zone Modelling Techniques
Ekren, Mustafa; Kayran, Altan (2019-09-18)
Prediction of the failure in composite repair is a widely studied subject in the literature due to the increasing importance of analysis over the expensive testing. Interlaminar failure is one of the most common failure mo...
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