Ahmet Atak

Ahmet Atak
Gazi University · TUSAŞ-Kazan Vocational School / Dep. of Motor Vehicles and Transportation Technology / Airplane Technology

PhD

About

26
Publications
9,443
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26
Citations
Introduction
My current research interest are Aircraft & Spacecraft (Satellite) Design. Therefore basicaly; Design Methodology, Methodicaly Design, Systematicaly Design, Design Testing with Verification, Virtual Testing, Failure mechanism with prediction, Design for Additive Manufacturing, Friction Stir Welding and Ethical Design are keywords for my research areas.

Publications

Publications (26)
Research
Full-text available
In the realm of beings, human beings by their nature, are never satisfied with one kind of product and are always on the lookout for difference and innovation. When the world of animals is observed, for example, it can be seen that they are beings who never tire of eating grass or doing the same thing for life. Besides, they do not have multiple op...
Chapter
Full-text available
Installation and repair of hydraulic installations are carried out by joining the pipes in the field. Pipe connections in aviation are made in a very narrow space and field. For this reason, fitting swaging method is used to connect the fittings to the pipes with a hydraulic hand tool. The basis for developing a swaging tool is knowledge of the des...
Article
Full-text available
In the realm of beings, human beings by their nature, are never satisfied with one kind of product and are always on the lookout for difference and innovation. When the world of animals is observed, for example, it can be seen that they are beings who never tire of eating grass or doing the same thing for life. Besides, they do not have multiple...
Article
Full-text available
Structural systems consist of subsystems and elements. Connection elements are needed for the subsystems and assembly and integration of these systems to the main system. Because the main system can fulfill its functional tasks when its assembly and integration with the subsystem is completed. Systematic static strength and dynamic behavior of stru...
Article
Full-text available
In various fields of engineering, the assembly and repair of hydraulic installations are accomplished by joining the pipes. In such applications, the ring swaging method is used to connect the fittings to the pipes by means of a hydraulic hand tool. The basis to develop a swaging tool relies on the knowledge of the design parameter that influence p...
Article
To reduce the fuel consumption and enhance the flight performance of satellites, it is desirable to employ structural components of low weight, high strength, and high stiffness. Therefore, most primary and secondary structures of satellites are built using sandwich panels. Fasteners, which constitute secondary structures, are normally used as join...
Conference Paper
Full-text available
Central cylinders (CC) are the main carrier structural elements that carry all satellites, especially used in communication satellites. For higher capacity satellites in terms of more electrical power, more payload and longer service life, it requires creating more volume in the satellite and effective use of space. In traditional chemical propulsi...
Article
Friction stir welding is commonly used to join metals because it is environmentally friendly and provides higher fatigue strength than electric resistance spot welding, riveted connections, and screw connections. Alternative methods that do not reduce the fatigue strength, such as friction stir spot welding (FSSW), are being investigated. However,...
Article
To reduce the fuel consumption and enhance the flight performance of satellites, it is desirable to employ structural components of low weight, high strength, and high stiffness. Therefore, most primary and secondary structures of satellites are built using sandwich panels. Fasteners, which constitute secondary structures, are normally used as join...
Poster
Full-text available
Structural systems are composed of their subsystems and elements. Connection parts are required through subsystems and their assembly and integration to the main system. The reason of that main system can be functional when it’s assembly and integration is completed with subsystem. The load carrier material and static cross-sectional properties, as...
Article
Full-text available
The strength, failure location and modes of AZ31B Magnesium sheets with 1.5 mm thickness, joined using friction stir spot welding (FSSW), can be determined using tension-shear tests. However, the joined materials have different tension test and elastic-plastic characteristics. Elastic analysis methods for spot welding have been examined in detail i...
Conference Paper
Full-text available
Uydu yapılarında, yakıt tüketimini azaltıp uçuş performansını arttırmak için genellikle yüksek dayanım ve katılık değerlerine sahip hafif komponentler tercih edilmektedir. Bu yüzden, sandviç kompozit yapılar ağırlıklarına göre dayanıklı yapılar olduğu için uydu bileşenlerinde sıklıkla kullanılmaktadır. Sandviç yapıların birbirleriyle ve başka donan...
Conference Paper
Full-text available
Showed and used methodology herein gives a new perspective for designers and researchers to distinguish the best design, by using Hierarchical Tree, Belief Map and Decision Matrix methods. In this study, The Decision Matrix, Hierarchical Tree Method, Belief Map and Eleven-Point Scaling are improved with quantitative evaluation methods to obtain a c...
Article
Full-text available
Design affects the entire lifespan of a product. Humans design ideas in their environments, especially to meet their own needs. People come to design ideas and abilities from various objects and events in nature, and use these to increase their design capabilities. With the increase in human population, proliferation of product needs, and the dange...
Conference Paper
Full-text available
This paper deals with weight optimization of the central cylinder (CC) made of Carbon-fiber reinforced polymer (CFRP) sandwich material using topologic optimization to be more advantageous over other types of the CC in terms of weight and cost. After finding optimal lay-up, orientations and number of laminate layers of CFRP sandwich cylindrical she...
Conference Paper
Full-text available
This paper summarizes results of a technical investigation made after a satellite structural test. After acoustic tests done on a telecommunication satellite, different dynamic behaviors observed on two similar and symmetrically placed equipments. Three possible causes are considered for the observed effect one of them is local turbulence in air fl...
Conference Paper
Full-text available
Eurocode 3 (EC3) was introduced in the European Community countries of June 2012. Previously the weld connection of steel structure was calculated with different methods (DIN 18800} in different countries. With TS EN 1993-1-1-December 2005-"design of steel structures," and TS EN 1993-l-8+AC - December 2005-"General Rules-design of joints named" has...
Article
Full-text available
The use of light metals today is of great importance, for example in the automotive, aviation and aerospace industries, where energy consumption is minimized and thus the economy is being attempted. By using light metals, weight is reduced so that energy is saved. Aluminum and magnesium alloys are particularly used thanks to their lightweight. Vehi...
Chapter
Full-text available
The Light metals such as aluminum and magnesium alloys find extensive use in land and air transport vehicles, electronics, computer and sporting goods industries. In order to reduce weight and thus save fuel, many studies are carried out on the development of new engineering materials, which have lightweight and high fatigue strength, especially fo...
Conference Paper
Full-text available
The use of light metals today is of great importance, for example in the automotive, aviation and aerospace industries, where energy consumption is minimized and thus the economy is being attempted. By using light metals, weight is reduced so that energy is saved. Aluminum and magnesium alloys are particularly used thanks to their lightweight. Vehi...
Conference Paper
Full-text available
Haberleşme uyduları üretimi sırasında, başlıca uydunun fırlatma sırasında olmak üzere, hizmet süresince maruz kalacağı sinüs, rastgele ve şok titreşimlerine karşı uygunluğunu test etmek için çevresel mekanik titreşim testlerine tabi tutulur. Bu testlerin planlanması, test için ivme ve gerinim ölçerlerin yerleştirilmesi, yatay ve düşey testlerin yap...
Conference Paper
Full-text available
The Light metals such as aluminum and magnesium alloys find extensive use in land and air transport vehicles, electronics, computer and sporting goods industries. In order to reduce weight and thus save fuel, many studies are carried out on the development of new engineering materials, which have lightweight and high fatigue strength, especially fo...
Article
Full-text available
In this paper, friction stir spot welding (FSSW) of magnesium sheets were analyzed using finite element method (FEM). Various tool shoulder types used in Friction stir welding (FSW) were chosen as different parameter. Thermic simulations were showed that thermic conditions vary with tool shoulder design types used in friction stir welding. Heat ene...
Article
Full-text available
Machine parts fail to perform their tasks due to the fatigue with the rate of 90%. The fatigue applications have been known since the early days of the industrial revolution. The field of study on metal fatigue has started to expand due to the increase in the use of steel constructions in the systems of railway bridges in particular. It is of criti...
Conference Paper
Full-text available
Light metals such as aluminum and magnesium alloys are used in land vehicles, electronics, computers, and sports device industry. Many studies have been carried out on the development of new, low weight engineering materials to reduce weight and fuel consumption, especially in the automotive and aerospace industries. One of the first metals that co...
Conference Paper
Full-text available
The main reason to finish the mission of machine parts is based with 90 % of the fatigue. Fatigue can be caused by surface defects with smoothness, sharp comers, indentations, protrusions, etc. One other sort of effect of fatigue the defects in the microstructure like ruins, cracks, sharp and sediment particles. Eurocode 3 (EC3) method has been dev...

Projects

Projects (5)