Browsing by Author "Toros, Serkan"
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6082 alüminyum alaşımının şekillendirme sınır diyagramının deneysel ve nümerik incelenmesi
Sürücü, Halit İlhan (Niğde Ömer Halisdemir Üniversitesi / Fen Bilimleri Enstitüsü, 2017)Günlük hayatta gerek ulaşım sektöründe gerek yüksek mukavemet gerektiren alanlarda kullanılan malzemelerin ağır olması yakıt sarfiyatına ve gereksiz ağırlık artışına neden olmaktadır. Son yıllarda sac malzemelerin ... -
6082 alüminyum alaşımının şekillendirme sınır diyagramının deneysel ve nümerik incelenmesi
Sürücü, Halit İlhan (Niğde Ömer Halisdemir Üniversitesi / Fen Bilimleri Enstitüsü, 2017)Günlük hayatta gerek ulaşım sektöründe gerek yüksek mukavemet gerektiren alanlarda kullanılan malzemelerin ağır olması yakıt sarfiyatına ve gereksiz ağırlık artışına neden olmaktadır. Son yıllarda sac malzemelerin ... -
COMPARISON OF (G '/G)-METHODS FOR FINDING EXACT SOLUTIONS OF THE DRINFELD-SOKOLOV SYSTEM
Daghan, Durmus; Yildiz, Ozlem; Toros, Serkan (WALTER DE GRUYTER GMBH, 2015)Nonlinear Drinfeld-Sokolov system is studied analytically by using four different methods (G'/G)-expansion, direct algebraic, different form of the (G'/G)-expansion methods, and direct integration) and the results are found ... -
Contribution of functionally graded material modelling on finite element simulation of rod end parts in automotive steering system
Toros, Serkan; Altinel, Kayhan (KOREAN SOC MECHANICAL ENGINEERS, 2016)One of the most important manufacturing steps of the rod end materials is the induction process by which the both hardness of the surfaces and the toughness of the part can be adjusted at the same time. In the study, rod ... -
EFFECT OF PRE-STRAINING ON THE SPRINGBACK BEHAVIOR OF THE AA5754-0 ALLOY
Toros, Serkan; Alkan, Mahmut; Ece, Remzi Ecmel; Ozturk, Fahrettin (INST ZA KOVINSKE MATERIALE I IN TEHNOLOGIE, 2011)This study presents the effect of pre-straining on the springback behavior of the AA5754-0 aluminum-magnesium (Al-Mg) alloy sheet under V bending by an experimental and finite-element simulation studies. Pre-straining ... -
Effects of aging parameters on formability of 6061-O alloy
Ozturk, Fahrettin; Esener, Emre; Toros, Serkan; Picu, Catalin R. (ELSEVIER SCI LTD, 2010)6XXX series aluminum-magnesium-silicon (Al-Mg-Si) alloys are medium strength alloys widely used as automotive body materials. The mechanical properties of these alloys are adjusted by performing age hardening heat treatments. ... -
Effects of anisotropic yield functions on prediction of forming limit diagrams of DP600 advanced high strength steel
Ozturk, Fahrettin; Toros, Serkan; Kilic, Suleyman (ELSEVIER SCIENCE BV, 2014)In recent years, numerous researchers have reported that the predicted forming limit diagrams strongly depend on the method of determining the material parameters used in the yield functions and the corresponding the shape ... -
Effects of different optimization methods on the predictions of YLD2000 yield criterion coefficients
Kılıç, Süleyman; Kacar, İlyas; Öztürk, Fahrettin; Toros, Serkan (Niğde Ömer Halisdemir Üniversitesi, 2019)The improved yield criteria are generally used in the finite element simulations of plastic deformation processes. Calculation accuracies of these criteria coefficients result successful simulation outcomes. In this study, ... -
Effects of electrolyte pattern on mechanical and electrochemical properties of solid oxide fuel cells
Timurkutluk, Bora; Celik, Selahattin; Toros, Serkan; Timurkutluk, Cigdem; Mat, Mahmut D.; Kaplan, Yuksel (ELSEVIER SCI LTD, 2012)In order to enhance the electrochemical performance and reduce the operation temperature of a conventional electrolyte supported solid oxide fuel cell (SOFC), a three layered electrolyte with various geometry is designed ... -
THE EFFECTS OF MATERIAL THICKNESS AND DEFORMATION SPEED ON SPRINGBACK BEHAVIOR OF DP600 STEEL
Toros, Serkan; Kilic, Suleyman; Ozturk, Fahrettin (TRANS TECH PUBLICATIONS LTD, 2011)There is an increase trend in the use of advanced high strength steels in automotive industry due to a combination of high strength and good formability in order to achieve substantial weight reduction. Lightening by using ... -
EVALUATION OF TENSILE PROPERTIES OF HIGH STRENGTH STEELS AT WARM TEMPERATURES AND VARIOUS STRAIN RATES
Ozturk, Fahrettin; Toros, Serkan; Bas, M. Hakan; Kilic, Suleyman (VERLAG STAHLEISEN MBH, 2008)The use of advanced high strength steels in automotive industry has been increased recently. Dual-phase (DP) high-strength steel, which is an advanced high strength steel, has gained great attention due to its high strength ... -
Finite Element Simulation of Diametral Strength Test of Hydroxyapatite
Ozturk, Fahrettin; Evis, Zafer; Toros, Serkan (AMER INST PHYSICS, 2010)In this study, the diametral strength test of sintered hydroxyapatite was simulated by the finite element software, ABAQUS/Standard. Stress distributions on diametral test sample were determined. The effect of sintering ... -
Flow curve prediction of Al-Mg alloys under warm forming conditions at various strain rates by ANN
Toros, Serkan; Ozturk, Fahrettin (ELSEVIER SCIENCE BV, 2011)This paper describes an approach based on artificial neural network (ANN) to identify the material flow curves of strain hardened 5083-H111 and 5754-O Al-Mg alloys at the temperature ranges from room temperature (RT) to ... -
Katı oksit yakıt pillerinde anot gazı geri kazanımı için ejektör geliştirilmesi
Genç, Ömer (Niğde Ömer Halisdemir Üniversitesi / Fen Bilimleri Enstitüsü, 2018)Bu tez kapsamında 4 kW güç kapasiteli metan yakıtlı bir katı oksit yakıt pili sistemi için ejektör tasarımı yapılmıştır. Ejektör giriş basıncı, çıkış basıncı, egzoz hattı giriş basıncı, egzoz hattı çıkış basıncı ve metan ... -
Mechanical and electrochemical behavior of novel electrolytes based on partially stabilized zirconia for solid oxide fuel cells
Celik, Selahattin; Timurkutluk, Bora; Toros, Serkan; Timurkutluk, Cigdem (ELSEVIER SCI LTD, 2015)In this study, 3 mol% yttria stabilized zirconia (3YSZ) is investigated as a SOFC electrolyte alternative to 8 mol% yttria stabilized zirconia (8YSZ). The mechanical and electrochemical properties of both materials are ... -
Microstructural finite element modeling of redox behavior of Ni-YSZ based ceramic SOFC anodes
Toros, Serkan (ELSEVIER SCI LTD, 2016)One of the main challenges in solid oxide fuel cell (SOFC) is the redox problem of Ni-based anodes. Therefore, the redox tolerance of the anode should be improved to increase the service life of the system. Since the real ... -
Parameters Determination of Yoshida Uemori Model Through Optimization Process of Cyclic Tension-Compression Test and V-Bending Springback
Toros, Serkan (LATIN AMER J SOLIDS STRUCTURES, 2016)In recent years, the studies on the enhancement of the prediction capability of the sheet metal forming simulations have increased remarkably. Among the used models in the finite element simulations, the yield criteria and ... -
Review of warm forming of aluminum-magnesium alloys
Toros, Serkan; Ozturk, Fahrettin; Kacar, Ilyas (ELSEVIER SCIENCE SA, 2008)Aluminum-magnesium (Al-Mg) alloys (5000 series) are desirable for the automotive industry due to their excellent high-strength to weight ratio, corrosion resistance, and weldability. However, the formability and the surface ... -
Rod başlarında indüksiyon yüzey sertleştirme işleminin ömür ve mekanik kuvvet dayanımlarına etkisi
Altınel, Kayhan (Niğde Üniversitesi / Fen Bilimleri Enstitüsü, 2015)Bu yüksek lisans çalışmasında, rot başlarında indüksiyon yüzey sertleştirme işleminin ömür ve mekanik kuvvet dayanımlarına etkisi araştırılmıştır. Rot başı üretiminin en önemli imalat adımlarından biri olan indüksiyon ... -
Tensile deformation behavior of AA5083-H111 at cold and warm temperatures
Ozturk, Fahrettin; Toros, Serkan; Kilic, Suleyman (CARL HANSER VERLAG, 2010)The effects of strain rate and temperature on the deformation behavior of hardened 5083-H111 aluminum magnesium alloy sheet were investigated by performing uniaxial tensile tests at various strain rates from 0.0083 to 0.16 ...
