• Optimal Material Selection for Total Hip Implant: A Finite Element Case Study 

  Abdullah Tahir Sensoy; Çolak, Murat; Irfan Kaymaz; Fındık, Fehim (SPRINGER HEIDELBERG, 2019)

  The selection of most proper materials in engineering design is known as an important stage of the design process. In order to successfully complete this stage, it is necessary to have sufficient knowledge about the structure ...
• Modeling of the Impact of Initial Mold Temperature, Al5Ti1B and Al10Sr Additions on the Critical Fraction of Solid in Die Casting of Aluminum Alloys using Fuzzy Expert System 

  C. Teke; Çolak, Murat; Taş, Mehmet; İpek, Mümtaz (Polish Acad Sciences Inst Physics, 2019)

  In the casting of liquid metal, the feeding stops when the mushy zone is clogged and does not allow the transfer of feeding liquid. The growing resistance of the solid dendrites against the fluidity of the feeding liquid ...
• Evaluation of the Influence of Upset Stage on Joint Properties of Friction Welded Dissimilar Aluminum-Copper Cast Alloys 

  Barlas, Zafer; Çolak, Murat (PO BOX 197-IV, LJUBLJANA 61001, SLOVENIA, 2014)

  Friction welding was applied to dissimilar aluminum cast bars alloyed with 2 and 8% copper and the effects of upset time on joint properties were evaluated in this study. The welding process was carried out by a vertical ...
• Melt Cleanliness Comparison of Chlorine Fluxing and Ar Degassing of Secondary Al-4Cu 

  Çolak, Murat; Kayıkcı, Ramazan (SPRINGER, 2016)

  The treatment of liquid aluminum prior to casting typically consists of purging gas and/or fluxes through the melt. By the use of several chemicals during these operations, several environmental problems can occur. Therefore, ...
• DETERMINATION OF THE CRITICAL FRACTION OF SOLID DURING THE SOLIDIFICATION OF A PM-CAST ALUMINIUM ALLOY 

  Kayıkcı, Ramazan; Çolak, Murat; Şirin, Selçuk (INST ZA KOVINSKE MATERIALE I IN TEHNOLOGIE, 2015)

  The results showed that the CFS values for solidifying aluminium alloys may vary from 34 % to 57 % depending on the casting conditions. The results also showed that for A356 aluminium-alloy castings the CFS value is not ...
• Tribological behavior of an ultrahigh molecular weight polyethylene in lubricated environments 

  Kahyaoğlu, Osman Kenan; Ünal, Hüseyin; Mimaroğlu, Abdullah; Yetgin, Salih Hakan (EUROPEAN POLYMER FEDERATION, 2011)

  The wear and friction performance of GUR 1020 grade ultrahigh molecular weight polyethylene (UHMWPE) polymer was studied in distilled water, HASS (Hank's balanced salt solution) and several protein lubrication environments. ...
• The Effect of Test Parameters on Friction and Wear Performance of PTFE and PTFE Composites 

  Ünal, Hüseyin; Yetgin, Salih Hakan; Mimaroğlu, Abdullah; Sümer, Mensur (SAGE PUBLICATIONS LTD, 2010)

  The friction and wear properties of pure poly-tetra-fluoro-ethylene (PTFE), 35% carbon filled poly-tetra-fluoro-ethylene (PTFE+35%C), and 17% glass fiber-reinforced polytetra- fluoro-ethylene (PTFE+17% GFR) sliding against ...
• Evaluation of the Performance of H3BO3-filled Polyamide Composite 

  Ünal, Hüseyin; Yetgin, Salih Hakan; Şen, Uğur; Mimaroğlu, Abdullah (SAGE PUBLICATIONS LTD, 2010)

  In this study, the performance of boric acid (H3BO3)-filled polyamide composites were studied and evaluated at dry-sliding friction conditions. Wear tests were carried out using configuration of composite pin on a rotating ...
• ALKALI SILICA REACTION OF BOF AND BFS WASTES COMBINATION IN CEMENT 

  Özkan, Ömer; Sarıbıyık, Mehmet (VILNIUS GEDIMINAS TECH UNIV, 2013)

  This study reports the results of an experimental study conducted to determine composite cements manufactured with the combination of Basic Oxygen Furnace (BOF) Slag and Blast Furnace Slag (BFS). The overall objective of ...
• Eco-efficiency of the world cement industry and innovations: panel causality data analysis 

  Özkan, Filiz; Özkan, Ömer (INDERSCIENCE ENTERPRISES LTD, 2013)

  Since the cement industry emits large amounts of greenhouse gases into the atmosphere, the sector is recently under scrutiny. This study empirically investigates the co-integration and the causality relationships between ...
• Physical and mechanical properties of composite cements 

  Özkan, Ömer (BAUVERLAG BV GMBH, 2009)

  This paper reports on the results of an experimental study conducted to evaluate the physical properties and strength development of composite cements manufactured with a steel slag (SS) and blast-furnace slag (BFS) ...
• Influence of high temperature on the properties of concretes made with industrial by-products as fine aggregate replacement 

  Özkan, Ömer (ELSEVIER SCI LTD, 2011)

  Influence of high temperature on the properties of concrete containing non-ground granulated blast-furnace slag (GBFS) and coal bottom ash (BA) as fine aggregate was presented. Six series of concrete mixtures were prepared ...
• Cost assessment of construction projects through neural networks 

  Özkan, Ömer; Gündüz, Mehmet; Demir, İsmail Hakkı (CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS, 2013)

  Construction performance parameters have experienced greater international attention and discussion in recent years. In this study, the change in the load-bearing system cost of a reinforced concrete housing estate building ...
• Causal relationship between construction investment policy and economic growth in Turkey 

  Özkan, Filiz; Özkan, Ömer; Gündüz, Mehmet (ELSEVIER SCIENCE INC, 2012)

  The construction industry in countries experiencing severe economic crisis has vital importance to get out of stagnation because of its direct relations with 200 different sectors. In this study, the relationship between ...
• Effects of project size and resource constraints on project duration through priority rule-base heuristics 

  Özkan, Ömer; Gündüz, Mehmet (SPRINGER, 2009)

  Priority rules are one of the frequently used methods in project programming with resource-constraints. In this paper, the effects of project size and number of resource constraints on project duration are compared to the ...
• Investigating the Effectiveness of Certain Priority Rules on Resource Scheduling of Housing Estate Projects 

  Gündüz, Mehmet; Özkan, Ömer (ASCE-AMER SOC CIVIL ENGINEERS, 2009)

  The heuristic method is one of the methods used for the scheduling of resource-constrained projects. This method is commonly used in programming the projects with high number of activities and resources such as construction ...
• Prediction of sulfate resistance of cements produced with GBFS and SS additives using artificial neural network 

  Özkan, Ömer; Yılmaz, Cemal (INDERSCIENCE ENTERPRISES LTD, 2013)

  Concrete structures built on sulfate rich soil or wetland, or directly exposed to seawater are subjected to sulfate attack, which might be critical, as the durability of concrete is highly dependent on its resistance against ...
• Friction and wear studies between cylinder liner and piston ring pair using Taguchi design method 

  Kapsız, Murat; Durat, Mesut; Fıçıcı, Ferit (ELSEVIER SCI LTD, 2011)

  This paper reports an experimental study of tribological characteristics of cylinder liner (CL)/piston ring (PR) pair. Reciprocating wear process parameters are optimized for minimum weight loss and friction based on mixed ...
• Investigation of seat belt use among the drivers of different education levels 

  Demirer, Ahmet; Durat, Mesut; Haşimoğlu, Can (ELSEVIER SCIENCE BV, 2012)

  Seat belt use habit has been investigated according to the education level of drivers. Copies of a questionnaire were distributed to 1000 participants of four different education levels. Factors such as seat belt usage ...
• The effects of coating materials in spark ignition engine design 

  Durat, Mesut; Kapsız, Murat; Nart, Ergün; Fıçıcı, Ferit; Parlak, Adnan (ELSEVIER SCI LTD, 2012)

  In this study, a steady-state thermal analysis was performed to evaluate the temperature gradients in the standard and two different partially stabilized ceramic coated pistons by using Abaqus (c) finite element (FE) ...

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