Batman Üniversitesi, Teknik Bilimler Meslek Yüksekokulu, Motorlu Araçlar ve Ulaştırma Teknolojileri Bölümü, Makale Koleksiyonu
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Öğe Optimization of welding parameters of AISI 431 and AISI 1020 joints joined by friction welding using taguchi method(Bilecik Şeyh Edebali Üniversitesi, 2022-06-30) Adin, Mehmet Şükrü; İşcan, Bahattin; Baday, ŞehmusMartensitic stainless steel AISI 431 and low carbon steel AISI 1020 are materials used together in many different industries. However, important problems are encountered when welding (fusion welding) these materials to each other. For this reason, friction welding process (Solid-state welding) is used to join these dissimilar metals. There are very few studies on joining these materials with friction welding. Therefore, the optimization of the welding parameters used in joining these dissimilar steel pairs with friction welding is of great important. In addition, the effects of the factors dependent on friction welding parameters need to be well understood. In this study, AISI 431 and AISI 1020 steel bars were successfully joined by friction welding, and the effects of welding parameters on tensile strength and axial shortening were investigated, and welding parameters were optimized using Taguchi method to obtain quality weld joints. The experimental results of the study showed that the highest tensile strength (573.32 MPa) of the joints was 54.53%, higher than the lowest tensile strength (370.99 MPa), the highest axial shortening (23.18 mm) was 650.16%, higher than the lowest axial shortening (3.09 mm). The optimal parameters for average axial shortening and average tensile strength were determined as A3B1C3 and A3B3C2; and the highest percentage contribution values for axial shortening and tensile strength were found to be 51.55% (rotating speed) and 63.90% (rotating speed); and R2 values for the average axial shortening and average tensile strengths were found to be 97% and 99.3%, respectively.Öğe Combustion, performance, and emissions of safflower biodiesel with dimethyl ether addition in a power generator diesel engine(Taylor & Francis, 2020-04-29) Aydın, Hüseyin; Işık, Mehmet Zerrakki; İşcan, Bahattin; Topkaya, HüsnaIn this study, the effect of dimethyl ether (DME) addition to diesel (ultralow sulfur diesel fuel) and biodiesel fuels on the combustion, performance, and emissions of a diesel-powered generator was investigated. For this purpose, fuel samples of the ternary blend that volumetrically composed of 10% safflower biodiesel–10% dimethyl ether–80% ultralow sulfur diesel fuel (B10DME10), the ternary blend that volumetrically composed of 25% safflower biodiesel–25% dimethyl ether–50% ultralow sulfur diesel fuel (B25DME25), the binary blend that volumetrically composed of 25% safflower biodiesel–75% ultralow sulfur diesel fuel (B10DME10) B25, and pure safflower oil biodiesel (B100) and standard ultralow sulfur diesel (D2) were prepared. The test engine was loaded by power drawing from the generator by the usage of equivalent powered electrical heating resistances. Generally, using DME with biodiesel improved the combustion properties of biodiesel blends that can be attributed to the lower viscosity of DME. The maximum cylinder pressure was obtained for B10DME10 in general and sometimes for B25DME25. When test fuels are compared, DME blends showed higher and earlier peaks of heat release compared to diesel and biodiesel blend fuels especially. It was found that combustion is more efficient from mass fuel consumption (MFC) and brake specific fuel consumption (BSFC) values in the use of DME than biodiesel. BSEC values of using DME in the blends considerably decreased that it is the proof of improved combustion and energy efficiency. The highest average efficiency values were obtained for B25DME25 as 28.3% although it has a lower calorific value than D2 due to the considerably improved combustion properties of DME, while the average efficiency values were 23.1%, 23.3%, and 20.7% for D2, B25, and B100 fuels, respectively. Highest carbon monoxide (CO) emissions were obtained in the use of pure biodiesel, while the lowest CO emissions were obtained in the use of DME. The addition of DME is seen to increase the nitrogen oxides (NOx) and CO emissions.Öğe Yapıştırıcının mekanik özelliklerinin bulk numuneler yardımıyla belirlenmesi(e-Journal of New World Sciences Academy, 2010-07) Adin, Hamit; Turgut, Aydın; İşcan, BahattinBu çalışmamızın amacı, konstrüksiyon tasarımı için gerekli bazı yapısal yapıştırıcıların mekanik özelliklerinin belirlenmesidir. Çalışmamızda yapıştırıcı malzemelerin mekanik özelliklerini tespit etmek içim bulk numuneler kullanılmıştır. Numuneler için kalıp yapılmış, numunelerin gaz boşlukları ve süneksizlikleri giderildikten sonra deneyler yapılmıştır. ASTM çekme deney prosedürü uygulanarak yapıştırıcıların mekanik değerleri bulunmuştur. Deneyler sonucunda yapıştırıcıların elastik şekil değiştirme gösterdikleri görülmüştür.Öğe The effect of angle adhesive with bonded in Z type materials(e-Journal of New World Sciences Academy, 2010-03) Adin, Hamit; Turgut, Aydın; İşcan, BahattinThe usage of adhesives as connecting on method is increasing rapidly in today world. Many of research, development and engineering have been made to find the most important parameters for a success adhesion. In this study, stress analysis of Z type bonded sheet that connected with various adhesives has been investigated. The adhesive thickness was constant (0.20 mm) b lap joint length and lap joint angles (θ=15º, 30º, 45º) were varied for analysis. This study has deal with the effect of overlap angle on predicting of the damage load of adhesively bonded joints via a linear FEM(Finite Element Method). All of the analysis were carried out with Ansys (10.0) computer software with a generally purposed finite element application. Experimental results were compared with numerical results and were found quite reasonableÖğe Bazı yapısal yapıştırıcıların mekanik özelliklerinin belirlenmesi(Fırat Üniversitesi, 2012) Adin, Hamit; İşcan, Bahattin; Turgut, AydınBu çalışmamızın amacı, tasarım için gerekli bazı yapısal yapıştırıcıların mekanik özelliklerinin belirlenmesidir. Çalışmamızda yapıştırıcı malzemelerin mekanik özelliklerini tespit etmek içim bulk numuneler kullanılmıştır. Numunelerin gaz boşlukları ve süreksizlikleri giderildikten sonra deneyler yapılmıştır. ASTM çekme deney prosedürü uygulanarak yapıştırıcıların mekanik değerleri bulunmuştur. Deneyler sonucunda yapıştırıcıların elastik şekil değiştirme gösterdikleri görülmüştür.Öğe The influence of adherend width on tensile strength and failure load of Z joints bonded with adhesive(International Journal of Physical Sciences, 2012-07-19) Adin, Hamit; işcan, BahattinIn this study, the influence of the adherend width on the tensile strength and failure loads of Z joints were analyzed both experimentally and numerically. The Z joints were subjected to tensile load in the experiments. The stress analyses were executed using the finite element method (FEM). The FEM analyses were performed with Ansys (v.14.0.1). The FEM analyses were carried out to investigate the stress and strain distributions in the adhesive layer of the Z joints. Experimental results were also compared with numerical results, thus they were found quite reasonable. The results showed that the joint strength and failure loads increased when specimen width (b) was increased. Lowest failure load was also determined at the 10 mm width for each specimen. In order to increase the performance of the joint, 30 mm was found to be the most suitable value of widthÖğe The effect of overlap length adhesive with bonded in Z type materials(Academic Journals, 2011-09-11) İşcan, Bahattin; Adin, Hamit; Aydın, TurgutThe usage of adhesives as connecting method is increasing rapidly in today world. Many of research, development and engineering have been made to find the most important parameters of adhesion. In this study, stress analysis of bonded Z type that connected with various adhesives has been investigated. The adhesive thickness and overlap non-angle was constant but overlap length and overlap angle were varied. This paper has deal with the effect of overlap length on predicting of failure load of adhesive. An effective method for numerical solution in finite element method (FEM) has been performed in analysis. The FEM code employed was ANSYS(10.0). Experimental results were compared with numerical results and were found quite reasonable.
