Menderes Kam - Independent Researcher (original) (raw)

Papers by Menderes Kam

Experimental Spectral Analysis of Split Sleeve Bearing Clearance Effect on a Rotating Shaft System

Makine Teknolojileri Elektronik Dergisi (elektronik), 2016

Bearing are one of the most widely used elements in rotating shaft systems with great risk of fai... more Bearing are one of the most widely used elements in rotating shaft systems with great risk of failure that can affect the systems. There are two broad types of bearings used in rotating shaft system: sleeve bearings or journal bearings and rolling element bearings. Split sleeve bearings are used for application where it is necessary to remove a cap for servicing or replacing bearing. Proper clearance between the shaft and the bearing is necessary to avoid vibration or loss of concentric orbit. The performance of rotating shaft system is very dependent on vibration generated by bearings. The use of vibration signal analysis is one of the most reliable measurement for this purpose. The main objective of the present study is experimentally to investigate the role of bearing clearance that is a critical parameter affecting dynamic characteristics of rotating shaft systems. The vertical bearing clearance through introduction of additional shims is operand to simulate a loose -worn- split sleeve bearing. Wear is responsible for many problems and large cost in rotating shaft system. Three different clearances configurations using shims have been tested. The results showed that a worn bearing will have a significant influence on the stability of rotating shaft system

International Journal of Analytical, Experimental and Finite Element Analysis (IJAEFEA), 2020

Warehouses inside the ship are of great importance in maritime transport. Due to the adverse weat... more Warehouses inside the ship are of great importance in maritime transport. Due to the adverse weather conditions in maritime transport, hatch covers must be manufactured appropriately and installed on ships. In this study, Computer Aided Design (CAD), manufacture, analysis, and mechanical properties of hatch cover opening hooks used to close stock type warehouse lids in maritime transport were examined. In literature studies, the mechanical properties of St-37, St-52, St-44, St-70, AISI 4140, Weldox 700, Hardox 600 steels, and Aluminum 6061 materials used as hook materials were examined. In the studies, it is seen that curved crane hooks and the same materials are preferred in these hooks. It was concluded that it would be appropriate to use St-37 from structural steels, AISI 4140 steel from tempered steels and high strength Weldox 700 steels as hook material. There is a need for the design and manufacture of special hooks for cranes made to open and close the hatch covers. Hook design-analysis by Finite Element Method (FEM) should be done and stress values should be examined. Accretion stress points should be determined by this FEM and a reliable manufacturing should be done. In addition, optimum conditions will be achieved by designing and manufacturing hooks with economical, long life and high mechanical properties.

sj-docx-1-pie-10.1177_09544089221078133 - Supplemental material for Experimental investigation and optimization of machining parameters of deep cryogenically treated and tempered steels in electrical discharge machining process

Supplemental material, sj-docx-1-pie-10.1177_09544089221078133 for Experimental investigation and... more Supplemental material, sj-docx-1-pie-10.1177_09544089221078133 for Experimental investigation and optimization of machining parameters of deep cryogenically treated and tempered steels in electrical discharge machining process by Menderes Kam, Ahmet İpekçi and Kudbeddin Argun in Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering

Tensile, Three-Point Bending and Impact Strength of 3D Printed Parts using PLA and Recycled PLA Filaments: A Statistical Investigation

Journal of Materials Research and Technology, 2022

Experimental investigation and optimization of machining parameters of deep cryogenically treated and tempered steels in electrical discharge machining process

Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering

Electrical Discharge Machining (EDM) is commonly used as non-traditional manufacturing methods fo... more Electrical Discharge Machining (EDM) is commonly used as non-traditional manufacturing methods for geometrically complex shaped or hardened materials that are extremely difficult-to-machine with traditional machining processes. In this experimental study, investigations were carried out on the machining of Conventional Heat Treated three different deep cryogenically treated and tempering processes (DCT&T) of AISI 4140 steels in EDM process. The process parameter such as discharge current (9, 16, 23, and 30 A), pulse on time (120, 180, 240, 300 µs) and pulse off time (12, 18, 24, and 30 µs) were investigated and the output responses like surface roughness, electrode wear ratio, material removal rate, and machining time were explored. Experiments were conducted using L16 orthogonal array in EDM machining process. The data obtained from experiments were analyzed. As a result, determination of discharge current (30 Amps), pulse off time (12 to 18 µs), pulse on time (180 to 240 µs) and d...

Elektro Galvaniz İşleminin St37 Ankraj Elemanının Korozyon Mekanizmasına Etkisinin Araştırılması

Düzce Üniversitesi Bilim ve Teknoloji Dergisi

Özet-Dönen makine sistemlerinde kullanılan millerin seçimi ve millere uygulanan ısıl işlemler çok... more Özet-Dönen makine sistemlerinde kullanılan millerin seçimi ve millere uygulanan ısıl işlemler çok önemli role sahiptir. Uygulanan ısıl işlemler ile millerin mekanik özelliklerinin iyileştirilmesi sağlanmaktadır. Millerin dinamik davranışları ve performansına ısıl işlemlerin etkisini belirlemede titreşimin ölçümü ve analizi gereklidir. Bu çalışmada, makine ve otomotiv endüstrisinde çeşitli parçaların imalatında yaygın olarak kullanılan AISI 4140 (42CrMo4) çeliğinden imal edilen kriyojenik işlem ve sıcak dövme işlemi uygulanmış millerin titreşim analizi deneysel olarak incelenmiştir. Deney düzeneğinde aynı yükleme ve çalışma şartları altında yuvarlanmalı yataklar ile desteklenmiş millerden ve yataklardan titreşim verileri alınmış ve ayrıntılı olarak karşılaştırılmıştır. Sonuçlar, derin kriyojenik işlem ve sıcak dövme işlemi uygulanmış millerin titreşimlerinde önemli farklılıklar olduğunu göstermiştir. Abstract-In rotating machinery systems, the selection of materials and treatment of ...

Isil İşlem Görmüş Mi̇lleri̇n Di̇nami̇k Davranişlarinin Deneysel Anali̇zi̇

Endustride turbo makineleri, jeneratorler, kompresorler, pompalar, buhar ve gaz turbinleri gibi c... more Endustride turbo makineleri, jeneratorler, kompresorler, pompalar, buhar ve gaz turbinleri gibi cesitli makine sistemlerinde istenen yuksek hiz ve agir yuk sartlari altinda guvenli ve kararli calisma gereksinimi gunden gune artmaktadir. Bu sistemlerde kullanilan millerin isletmedeki calisma frekanslarinin kendi frekansina denk gelmesi veya cok yakin olmasi calisan sistemde tinlasim (rezonans) durumunu ortaya cikarir. Boylece milin mekanik enerjisi giderek artar ve bu artan enerjiyi dengeleyecek tedbirler alinmamissa sonucunda milin kirilmasi gerceklesebilir. Bu sebeplerden dolayi makine sistemlerinin dinamik davranislari buyuk onem tasimaktadir. Makinelerin dinamik davranislarinin belirlenmesinde en onemli ve detayli bilgileri veren titresim karakteristikleridir. Titresim karakteristikleri, makinenin isletme sartlarindaki performansini ve mekanik problemlerinin ortaya cikarilmasinda en onemli faktorleri teskil ederler. Sistemdeki titresimlerin nispeten azaltilmasi makine parcalarind...

3D printing filling structures at prototyping and design stage are increasingly important issue f... more 3D printing filling structures at prototyping and design stage are increasingly important issue for products with complicated shapes. The objective of the present study is to investigate 3D printing filling structures effect on mechanical properties and surface roughness of PET-G (Polyethylene Terephthalate Glycol) material products. The PET-G material was preferred because of its durability, high transparency and odor characteristics. A variety of methods are used to manufacture products. Each has its advantages and drawbacks. One of these methods to adopt for this investigation was FDM (Fused Deposition Modeling) 3D printing method. The FDM method was considered that it has a direct effect on the mechanical properties and surface roughness of the product. The experiments were carried out using PET-G materials with different printing filling structures (rectilinear, triangular, full honeycomb), at processing speed of 50 mm/s. Uniaxial tensile tests, hardness measurements, and surf...

Dynamic Behavior Analysis of Rotor Supported by Damped Rolling Element Bearing Housing, pages: 159-164

A typical rotating machinery system consists various components, such as rotor, support bearing, ... more A typical rotating machinery system consists various components, such as rotor, support bearing, and disks. These components pass out energy into the system when coincident to critical speeds. Ignoring such event might lead to disastrous breakdown of the system. Due to necessity and vital contribution to most rotating machineries, the requirements on rolling element bearings have become stricter every day. In this experimental study, the dynamic behavior and displacement of rotor supported by damped rolling element bearing housing for different running speeds and load levels are analyzed and compared.

Kriyojenik ve Temperleme İşlemi Uygulanmış AISI 4140 Çeliğinden İmal Edilen Millerin Yuvarlanmalı Yataklarda Çalışma Kararlılığının Deneysel İncelenmesi

Donen makine sistemleri miller, yuvarlanmali yataklar ve diskler olmak uzere cesitli mekanik bile... more Donen makine sistemleri miller, yuvarlanmali yataklar ve diskler olmak uzere cesitli mekanik bilesenlerden olusmaktadir. Bu bilesenlerin kullanildigi makine sistemlerinin calisma kararliliklarinin belirlenmesinde en onemli ve ayrintili verilerin elde edilmesi titresim analizi ile yapilabilmektedir. Bu sistemlerin kararliligi icin titresimlerin azaltilmasi uygun malzeme secimi ve malzemelerin mekanik ozelliklerinin iyilestirilmesi ile yapilmaktadir. Bu calismada; makine ve otomotiv endustrisinde yaygin kullanim alanina sahip AISI 4140 (42CrMo4) celiginden imal edilmis kriyojenik ve temperleme islemi uygulanmis millerin calisma kararliligi deneysel olarak incelenmistir. Bu baglamda, ayni yukleme ve calisma sartlarinda yuvarlanmali yataklarla desteklenmis uc kismina fan takilmis millerin calisma kararliliginin incelenmesi icin titresim analizleri karsilastirmali olarak yapilmistir. Sonuclar, kriyojenik islem ve kriyojenik islem sonrasi temperleme islemi uygulanmis millerin calisma kara...

Vibration damping capacity of deep cryogenic treated AISI 4140 steel shaft supported by rolling element bearings

Materials Testing, 2021

The main objective of the present study is to experimentally investigate and figure out the effec... more The main objective of the present study is to experimentally investigate and figure out the effect of deep cryogenic treatment in improving dynamic behaviors in terms of damping of a rotating shaft supported by rolling element bearings. An AISI 4140 steel for rotating shafts was selected for the experiments because it is the most widely used material in most industries for a wide range of applications such as machinery components, crankshafts, motor shafts, axle shafts, and railway locomotive traction motor shafts. Untreated, conventionally heat treated, deep cryogenic treated, and deep cryogenic treated and tempered shafts were used for the experiments to observe damping behavior changes of the shafts. Deep cryogenic treated and deep cryogenic treated and tempered shafts were cooled from pre-tempering temperature to -140 °C and held for tempering hold times of 12, 24, 36, and 48 hours. So, ten sets of shafts were employed for the experiment. The vibration data was captured for each...

In recent years, three-dimensional (3D) printing is attracting widespread interest due to functio... more In recent years, three-dimensional (3D) printing is attracting widespread interest due to functional rapid prototyping and products by reducing the time and material involved in process. Most of 3D printer users focus on mechanical properties of products neglecting vibration characteristics of printer system effects on products. The aim of this study is to investigate the effects of 3D printer system vibrations on mechanical properties of printed products. Fused Deposition Modeling (FDM) technology which is one of most used additive manufacturing process was used to print test samples and Polyethyletherphthalate Glycol (PET-G) was used as material for printing. Vibration measurements were taking for eighteen printed test samples. Vibrations data were measured from 3D printer movement in three axes (x, y, and z) by accelerometers. The processing parameters were selected as occupancy rate, filling structures orientation, and processing speed. The samples in rectilinear filling structu...

Dynamic Behavior Analysis of Rotor Supported by Damped Rolling Element Bearing Housing

typical rotating machinery system consists various components, such as rotor, support bearing, an... more typical rotating machinery system consists various components, such as rotor, support bearing, and disks. These components pass out energy into the system when coincident to critical speeds. Ignoring such event might lead to disastrous breakdown of the system. Due to necessity and vital contribution to most rotating machineries, the requirements on rolling element bearings have become stricter every day. In this experimental study, the dynamic behavior and displacement of rotor supported by damped rolling element bearing housing for different running speeds and load levels are analyzed and compared.

Journal of Nanomaterials, 2020

In addition to traditional manufacturing methods, Additive Manufacturing (AM) has become a widesp... more In addition to traditional manufacturing methods, Additive Manufacturing (AM) has become a widespread production technique used in the industry. The Fused Deposition Modeling (FDM) method is one of the most known and widely used additive manufacturing techniques. Due to the fact that polymer-based materials used as depositing materials by the FDM method in printing of parts have insufficient mechanical properties, the technique generally has limited application areas such as model making and prototyping. With the development of polymer-based materials with improved mechanical properties, this technique can be preferred in wider application areas. In this context, analysis of the mechanical properties of the products has an important role in the production method with FDM. This study investigated the mechanical properties of the products obtained by metal/polymer composite filament production and FDM method in detail. It was reviewed current literature on the production of metal/poly...

journal of new results in science, 2018

Recent developments in 3D printing are attracting wide spread interest due to easily accessible w... more Recent developments in 3D printing are attracting wide spread interest due to easily accessible with lower cost. The present paper aims to investigate printing occupancy rates effect on mechanical properties and surface roughness of PET-G (Polietilen Tereftalat Glikol) material products. Pet-G material was preferred because of its malleability , colorability and mechanical properties. PET-G products were printed at different printing occupancy rates (20%, 50% and 80%) at processing speed of 45 mm/s and all other operating parameters fixed at the same conditions on 3D printer. Uniaxial tensile tests, hardness measurements and surface roughness measurements of the printed products were carried out. The results were analyzed and compared .

A Research on the General Perceptions and Attitudes of House Breaking Victims Towards the Police

Providing security and protecting human rights in democratic societies requires a sensitive balan... more Providing security and protecting human rights in democratic societies requires a sensitive balance. Because of notions of policing, crime and security concepts' reconsideration the first community policing branched organized at SariyerIstanbul in 2006. This research has been organized with the cooperation of Marmara University Guidance and Psychological Counseling Department (G.P.C.D.) and Kadikoy Branch Office of Community Policing. As part of a project initiated by the CP branch office for decreasing the crime of house breaking, the purpose of this research is to examine the perception of the house breaking victims of the works of the related police departments and of the police in general. As the universe of the research, four neighborhoods from Kadikoycounty have been taken as samples. The analysis was made according to the questionnaire filled by 349 people. As the data collection tool, a questionnaire was prepared by the researchers.Among the findings, it is seen that, af...

Effect of FDM Process Parameters on the Mechanical Properties and Production Costs of 3D Printed PowerABS Samples

The main objective of this study is to analyze of the effect of fused deposition modelling (FDM) ... more The main objective of this study is to analyze of the effect of fused deposition modelling (FDM) printing process parameters on the mechanical properties, printing times and production costs of samples printed with Power Acrylonitrile Butadiene Styrene (PowerABS) filament using a three-dimensional (3D) printer. This study is primarily focused on the effects of the mechanical properties of 3D samples subjected to the influence of three factors; layer thickness (0.15, 0.2, and 0.25 mm), raster angle (15, 45, and 75), table orientation (flat, horizontal, and vertical). For the experiment study, analytical methods such as regression analysis, variance analysis (ANOVA), Signal / Noise (S / N) ratio were used to determine the effect of FDM printing parameters on the mechanical properties with Taguchi optimization method. The results showed that 45° raster angle the highest mechanical properties at each individual layer when compared to 15° and 75°. The results also found tensile strength ...

Derin Kriyojenik İşlemin Farklı Bekletme Sürelerinin AISI 4140 (42CrMo4) Çeliğin Mekanik Özelliklerine Etkisi

Bu calismada, ozellikle otomotiv endustrisinde yaygin olarak kullanilan AISI 4140 (42CrMo4) celig... more Bu calismada, ozellikle otomotiv endustrisinde yaygin olarak kullanilan AISI 4140 (42CrMo4) celiginin mekanik ozellikleri uzerinde farkli bekletme sureli derin kriyojenik islemin etkisi incelenmistir. Bu amacla hazirlanan AISI 4140 celiginden imal edilen numunelere geleneksel isil islem uygulanmis ve geleneksel isil islemi tamamlayici bir islem olan derin kriyojenik islem farkli bekletme surelerinde (12, 24, 36 ve 48 saat) - 140 °C sicaklikta uygulanmistir. Derin kriyojenik islem sonrasinda numunelere 200 °C’ de temperleme islemi uygulanmistir. AISI 4140 celigin mekanik ozelliklerinin belirlenebilmesi icin sertlik olcum ve cekme testleri gerceklestirilmistir. Bu testlerden elde edilen bulgular analiz edilmis ve karsilastirilmistir. Sonuclar, farkli bekletme sureli derin kriyojenik islemin ve derin kriyojenik islem sonrasi uygulanan temperleme isleminin AISI 4140 celigin mekanik ozellikleri uzerinde onemli etkileri oldugunu gostermistir. Derin kriyojenik islemli numunelerde onemli s...