Mevlüt Aydın

Konya Technical University · Mechanical Engineering

Fused Filament Fabrication (FFF) is a 3D (three-dimensional) printing technology that allows the production of polymers with a wide range of infill densities and unlimited geometric variations. Because of this flexibility, mechanical properties can be optimized by tuning printing parameters. However, the energy consumption during fabrication varies...

Ti-6Al-4V alloy sheet is an engineering material that is widely used due to its superior properties such as high strength-to-density ratio besides high temperature and corrosion resistance. However, its low formability at room temperature limits its wider applications. In this study, a cylindrical cup was hydroformed using a female die to examine h...

Many methods are used to determine the formability of sheet metal parts. For example, measuring the radius of curvature of a bulged part or the corner and die entrance radius of a part produced as a cylindrical cup is necessary. Generally, different gauges or measuring instruments are used for each measurement. However, the 3D scanning process can...

Ti–6Al–4 V sheets possess limited formability at room temperature due to low ductility with almost no strain hardening. Pressure pulsation during hydroforming may bring significant improvement as an alternative to the widespread solution hot forming. However, much uncertainty exists on the deformation mechanism and effects of pulsating on difficult...

In industry, structural parts generally work under cyclic loading. After a while under these loads, microcracks usually start on the surface. The microcracks grow into macrocracks and cause fatigue and fracture of the material even at stresses far below the yield strength. It is possible to increase the fatigue strength of materials with several su...

In this study, by using the double-sided hydroforming process (DSHP), scientific studies have been conducted to reach the highest formability possible with today’s technology in deep drawing at room temperature and to produce difficult-to-shape parts. For the first time, the type-2 fuzzy logic controller (T2FLC) working with adaptive finite element...

In this study, the effect of the roller burnishing process on surface integrity and fatigue performance of AISI 4340 steel, which had been used in the cylinder of pressure intensifier, was investigated. The effects of burnishing depth, feed rate, and burnishing speed parameters of the roller burnishing process were examined. The roller burnishing p...

In this study, geometric parameters affecting the design of thick-walled cylinders operating under ultra-high pressure were investigated. In this context, the effects of design parameters on the maximum stresses occurring on the inner surface of the cylinder and the maximum interface pressure between the layers under 350 MPa pressure were determine...

In this study, the differences in stress levels of compound cylinders with different material pairs operating under ultra-high pressure were investigated. In addition, the lightest cylinder that can be obtained by determining the optimum dimensions in compound cylinders with the same stress value has been investigated. And the weight savings that c...

In this study, the effects of cutting tool overhang length on the surface roughness of austempered GGG70 cast iron material were investigated in the milling process. In this context, cutting speed, feed rate, cutting depth and number of passes were kept constant and milling was carried out at cutting tool overhang lengths of 2, 2.5, 3, 3.5, 4, 4.5...

In this study, the fatigue life of a shrink-fitted two-layer cylinder operating under high pressure is estimated by using Finite Element Method (FEM).