A cylindirical shell with a fixed end which contains a circumferential part-through or through crack under general loading

Gülgeç, Müfit


The deactivation behavior of the TiO2 used as a photo-catalyst for benzene oxidation
Üner, Deniz (1999-01-01)
In this study, the deactivation behavior of TiO2 as a photocatalyst for benzene decomposition to carbon dioxide and water was investigated. The effect of space time on the benzene and carbon dioxide conversions were monitored. Benzene conversion and carbon dioxide production rates were not correlated, indicating accumulation of a carbon containing intermediate on the surface. This intermediate was blocking the active sites at a stiochiometry of 1 C:1 site. High space times favored the production of carbon d...
SELAMPINAR, F; Akbulut, Ural; YALCIN, T; SUZER, S; Toppare, Levent Kamil (Elsevier BV, 1994-02-01)
A conducting composite of polypyrrole was prepared via electrochemical methods. A polyamide was used as the insulating matrix polymer. The characterization of the composite was done by FT-IR, SEM, TGA, DSC and pyrolysis studies. Conductivity and solubility studies together with spectroscopic methods reveal that H bonding exists between the two polymers and a possible grafting to a certain extent.
Determining surface residual stress in steel sheets after deep drawing and bulging processes
Adıgüzel, Sinem; Gür, Cemil Hakan; Karadoğan, Celalettin; Department of Metallurgical and Materials Engineering (2011)
The aim of this thesis is to investigate the effects of bulging and deep drawing processes on St4 cold rolled steel by simulation and experimental characterization. In the simulations, commercial software programs MSC Marc and Simufact.forming were used. The experimental studies cover metallographic investigations, hardness measurements, and residual stress measurements. Residual stress measurements were carried out by different non- destructive characterization methods; X-ray diffraction and Magnetic Barkh...
First principles investigation of hydrogen storage in intermetallic systems
Kınacı, Alper; Aydınol, Mehmet Kadri; Department of Metallurgical and Materials Engineering (2007)
The design and production of efficient metal-hydrides for hydrogen storage is a long standing subject. Over the years, many different types of intermetallic hydride systems were studied and some of them came out to be operable. However, none of them meet all the storage criteria perfectly. In this study, total energies, hydrogen storage capacity and stability of AB (A = Al, Be, Cu, Fe, Ni, Sb, V and B = Ti) type intermetallics were investigated with the goal of spotting a potential hydrogen storage material...
Synthesis of benzotriazole bearing donor acceptor type electroactive monomers towards high optical contrast and fast switching electrochromic materials
Balan, Abidin; Toppare, Levent Kamil; Department of Chemistry (2009)
Synthesis of new electroactive monomers are highly desired since these compounds can be utilized as active layers in many device applications such as ECDs, LEDs and solar cells. EDOT (3,4 ethylenedioxythiophene) and thiophene bearing polymers were also proven to be excellent candidates as electrochromic materials. Benzotriazole can be coupled to EDOT and thiophene to yield materials that can be polymerized to give donor acceptor type polymers. These materials are promising candidates as components in fast s...
Citation Formats
M. Gülgeç, “A cylindirical shell with a fixed end which contains a circumferential part-through or through crack under general loading,” Ph.D. - Doctoral Program, Middle East Technical University, 1993.