Demirkan Çöker

E-mail
coker@metu.edu.tr
Department
Department of Aerospace Engineering
Scopus Author ID
Web of Science Researcher ID
2D and 3D simulations of dynamic delamination in curved unidirectional CFRP laminates subjected to moment/axial combined loading
Ata, Tamer Tahir; Çöker, Demirkan (2021-07-15)
© 2021 Elsevier LtdDynamic failure of 30-ply curved unidirectional CFRP laminate under quasi-static moment/axial combined loading used in the experiments of Tasdemir (2018) is investigated numerically. 2D and 3D explicit f...
In-situ investigation of dynamic failure in [0(5)/90(3)](5) CFRP beams under quasi-static and low-velocity impact loadings
Bozkurt, Mirac Onur; Çöker, Demirkan (2021-03-01)
In this paper, experimental work to investigate the failure sequence in cross-ply CFRP beams under quasi-static and low-velocity impact (LVI) loadings is presented. [0(5)/90(3)](s) CFRP beams with thick clustered plies are...
Intersonic shear crack propagation using peridynamic theory
Yolum, Ugur; Çöker, Demirkan; Guler, Mehmet A. (2021-02-01)
Dynamic crack propagation of mode-II cracks is simulated using bond-based Peridynamic Theory (PD) implemented in finite element analysis software ABAQUS. The specimen is a bonded homogeneous Homalite plate with a pre-notch...
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...
Strength analysis of a 5-m composite wind turbine blade under static and fatigue loading conditions
Muyan, C.; Çöker, Demirkan (2020-10-23)
© Published under licence by IOP Publishing Ltd.This study focuses on the static and fatigue strength analysis of the existing 5-m RUZGEM composite wind turbine blade with and without defect in the form of debonding. Puck ...
3D Simulation of Dynamic Interlaminar Failure in Curved Unidirectional CFRP Laminates
Ata, Tamer Tahir; Çöker, Demirkan (null; 2020-09-01)
3D Simulation of Dynamic Interlaminar Failure in Curved Unidirectional CFRP
Çevik, Ahmet; Çöker, Demirkan (null; 2020-09-01)
Development of Bolted Flange Design Tool Based on Artificial Neural Network
Yıldırım, Alper; Akay, Ahmet Arda; Gülaşık, Hasan; Çöker, Demirkan; Gürses, Ercan; Kayran, Altan (ASME International, 2019-7-17)
<jats:p>Finite element analysis (FEA) of bolted flange connections is the common methodology for the analysis of bolted flange connections. However, it requires high computational power for model preparation and nonlinear ...
Comparison of damage mechanisms in curved composite laminates under static and fatigue loading
Tasdemir, B.; Çöker, Demirkan (Elsevier BV, 2019-04-01)
In this paper, damage progression in curved CFRP composite laminates are experimentally investigated for static and fatigue loadings. Two different cross-ply laminate thicknesses are examined with grouped plies to elucidat...
Simulation of Drop-Weight Impact Test on Composite Laminates using Finite Element Method
Bozkurt, Mirac Onur; Parnas, Levend; Çöker, Demirkan (Elsevier BV; 2019-01-01)
This study presents the simulation of standard drop-weight impact test on a [0/90/0]s composite laminate. For this purpose, a three-dimensional virtual test setup is developed in ABAQUS/Explicit finite element tool. Hemisp...
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