An investigation of stretch forming in relation to deep-drawing and testing sheet metal.

Kaftanoğlu, Bilgin


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...
An Investigation of ductile fracture criteria for sheet metal forming /
Abbasnejad Dizaji, Shahram; Darendeliler, Haluk; Kaftanoğlu, Bilgin; Department of Mechanical Engineering (2014)
Deep drawing is a sheet metal forming process in which a sheet metal stock, commonly referred to as a blank, is drawn into a die by a punch. Forming limit diagram (FLD), a representation of the critical combination of the principal surface strains, is an important concept utilized for the evaluation of the formability of sheet metals. Most of the theoretical methods for determining FLDs are strain-path dependent and cannot exactly clarify the location of necking or fracture. Using stress-based forming limit...
Design and construction of double promoter systems and their use in pharmaceutical protein production in P. Pastoris
Demir, İrem; Çalık, Pınar; Department of Chemical Engineering (2019)
Intracellular phenomena such as promoter strength, mRNA secondary structure, translation efficiency and codon preference, 5′-untranslated region processing, and protein turnover, have impacts directly on the expression of heterologous genes. Design of multi-promoter expression systems with constituent strong promoters and engineered promoter variants is a novel metabolic engineering strategy for increasing the promoter strength further, and tuning the expression for recombinant protein (r-protein) productio...
The transport and thermodynamical properties of liquid metals
Khajil, Tayel Mohammed Ali; Tomak, Mehmet; Department of Physics (1988)
Citation Formats
B. Kaftanoğlu, “An investigation of stretch forming in relation to deep-drawing and testing sheet metal.,” Middle East Technical University, 1966.