Browsing by Author "Baykasoğlu, Cengiz"
Now showing items 1-20 of 24
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Bir kanatçık tahrik sistemi yapısının sistem davranışına etkilerinin sayısal ve deneysel olarak incelenmesi
Keleş, Murat (Hitit Üniversitesi Fen Bilimleri Enstitüsü, 2018)Kanatçık tahrik sistemi mühimmata yönelim hareketini sağlayan kanatçıkları hareket ettiren sistemler olup, mühimmatın başarılı bir uçuş yapabilmesi için bu sistemlerin davranışları ile ilgili belirsizliklerin minimum ... -
A comparative study on crashworthiness of thin-walled tubes with functionally graded thickness under oblique impact loadings
Baykasoğlu, Cengiz; Baykasoğlu, Adil; Tünay, Merve (Taylor and Francis Ltd., 2019)The main objective of this study is to investigate the effects of functionally graded thickness (FGT) patterns and cross-sectional shapes (i.e. circular, square and hexagonal) on crashworthiness performance of thin-walled ... -
Crashworthiness optimization of circular tubes with functionally-graded thickness
Baykasoğlu, Adil; Baykasoğlu, Cengiz (Emerald Group Publishing Ltd., 2016)Purpose: The purpose of this paper is to develop a new multi-objective optimization procedure for crashworthiness optimization of thin-walled structures especially circular tubes with functionally graded thickness. ... -
Development of a design for a crash energy management system for use in a railway passenger car
Meran, Ahmed Partovi; Baykasoğlu, Cengiz; Muğan, Ata; Toprak, Tuncer (SAGE Publications Ltd, 2016)A design approach for a crash energy management (CEM) system for a N13-type railway passenger car used by the Turkish State Railway Company is developed in this paper. The components of the CEM system are honeycomb-structured ... -
Effect of attachment types and number of implants supporting mandibular overdentures on stress distribution: A computed tomography-based 3D finite element analysis
Arat Bilhan, Selda; Baykasoğlu, Cengiz; Bilhan, Hakan; Kutay, Ömer; Muğan, Ata (Elsevier Ltd, 2015)The objective of this study was to calculate stresses in bone tissue surrounding uncoupled and splinted implants that are induced by a bite force applied to the mandible and to determine whether the number of mandibular ... -
Effects of lithium doping on hydrogen storage properties of heat welded random CNT network structures
Baykasoğlu, Cengiz; Öztürk, Zeynel; Kırca, Mesut; Çelebi, Alper Tunga; Muğan, Ata; To, Albert C. (Elsevier Ltd, 2016)This paper presents the effects of lithium doping on the hydrogen storage capability of heat welded random carbon nanotube (CNT) network structures having different cross-link densities at room temperature. Cluster based ... -
Energy absorption of circular aluminium tubes with functionally graded thickness under axial impact loading
Baykasoğlu, Cengiz; Tünay, Merve (Taylor and Francis Ltd., 2015)The main objective of this study is to investigate the effects of thickness-gradient patterns on energy absorption characteristics of aluminium-based circular tubes under axial impact loading. Functionally graded thickness ... -
Energy absorption of thin-walled tubes enhanced by lattice structures
Çetin, Erhan; Baykasoğlu, Cengiz (Elsevier, 2019)Thin-walled structures filled or covered by various materials have been proposed for energy absorption applications in recent years. At this point, additive manufacturing technologies provide an unprecedented opportunity ... -
An experimental study on the compressive response of CFRP honeycombs with various cell configurations
Pehlivan, Levent; Baykasoğlu, Cengiz (Elsevier Ltd, 2019)The experimental investigation on the compressive response of carbon fiber reinforced polymer (CFRP) honeycombs with various cell configurations was carried out in the present work. The CFRP honeycomb specimens were ... -
Failure analysis of graphene sheets with multiple Stone-Thrower-Wales defects using molecular mechanics based nonlinear finite element models
Baykasoğlu, Cengiz; Muğan, Ata (Hitit Üniversitesi Fen Bilimleri Enstitüsü, 2018-06-09)Experimental studies show that Stone-Thrower-Wales (STW) defects generally exist in graphene sheets (GSs) and these defects considerably affect the fracture strength of GSs. Thus, prediction of failure modes of GSs with ... -
Fonksiyonel derecelendirilmiş ince cidarlı tüplerin çarpışma dayanımlarının incelenmesi
Tunay Çetin, Merve (Hitit Üniversitesi Fen Bilimleri Enstitüsü, 2015)Bu tez çalışmasında, eksenel ve eğik darbe yüklemeleri altında fonksiyonel olarak derecelendirilmiş kalınlıklı ve eşdeğer kalınlıklı ince cidarlı alüminyum silindirik tüplerin çarpışma davranışları sistematik olarak ... -
Hydrogen storage in heat welded random CNT network structures
Öztürk, Zeynel; Baykasoğlu, Cengiz; Çelebi, Alper Tunga; Kırca, Mesut; Muğan, Ata; To, Albert C. (Elsevier Ltd, 2015)The objective of this study is to investigate hydrogen storage capability of heat welded random carbon nanotube (CNT) network structures. To achieve this objective, different three-dimensional random CNT network structures ... -
Kafes yapı dolgulu hibrit tüplerin enerji sönümleme performanslarının sonlu elemanlar yöntemi kullanılarak incelenmesi
Çetin, Erhan; Baykasoğlu, Cengiz (2019)İnce cidarlı tüplerin enerji sönümleme performanslarının iyileştirmesine yönelik literatürde birçok farklı yaklaşım önerilmiştir. Bu bağlamda farklı tipte malzemeler, kesit geometrileri, desenler vb. önerilmiş ve bu yapıların ... -
Kafes yapı dolgulu ince cidarlı tüplerin çarpışma davranışlarının sayısal olarak incelenmesi
Çetin, Erhan (Hitit Üniversitesi Fen Bilimleri Enstitüsü, 2020)İnce cidarlı tüpler pasif araç güvenlik sistemlerinde çarpışma enerjisi sönümleyici elemanlar olarak sıklıkla kullanılmaktadır. Son yıllarda oldukça popüler olan metal eklemeli imalat teknolojileri ince cidarlı metal ... -
Multi-objective crashworthiness optimization of lattice structure filled thin-walled tubes
Baykasoğlu, Adil; Baykasoğlu, Cengiz; Çetin, Erhan (Elsevier Ltd, 2020)Thin-walled tubes have been mostly used in passive vehicle safety systems as crash energy absorber. With the use of additive manufacturing technology, it is possible to produce novel filler materials to further enhance the ... -
Multiple objective crashworthiness optimization of circular tubes with functionally graded thickness via artificial neural networks and genetic algorithms
Baykasoğlu, Adil; Baykasoğlu, Cengiz (SAGE Publications Ltd, 2017)The objective of this paper is to develop a multiple objective optimization procedure for crashworthiness optimization of circular tubes having functionally graded thickness. The proposed optimization approach is based on ... -
Predicting energy absorption parameters of aluminum lattice structures filled tubes via artificial neural networks
In this paper, the energy absorption parameters of aluminum body centered cubic lattice structures filled thin-walled tubes under axial loading are predicted via artificial neural networks (ANNs). Different tube thickness, ... -
Predicting microstructure evolution during directed energy deposition additive manufacturing of Ti-6Al-4V
Baykasoğlu, Cengiz; Akyıldız, Öncü; Candemir, Duygu; Yang, Qingcheng; To, Albert C. (American Society of Mechanical Engineers (ASME), 2018)Laser engineering net shaping (LENS) is one of the representative processes of directed energy deposition (DED) in which a moving heat source having high-intensity melts and fuses metal powders together to print parts. The ... -
Quasi-static axial crushing behavior of thin-walled circular aluminum tubes with functionally graded thickness
Erdin, Muhammed Emin; Baykasoğlu, Cengiz; Tunay Çetin, Merve (Elsevier Ltd, 2016)In this paper, the crushing behavior of circular aluminum thin-walled tubes with functionally graded thickness (FGT) are investigated experimentally. To this aim, three different thickness grading patterns are introduced ... -
Rollover crashworthiness analysis of a railroad passenger car
Rollover of railroad passenger cars is one of the most serious accidents having high rates of injuries and fatalities. Therefore, the railroad passenger car structures should satisfy the rollover crashworthiness requirements ...
