Mekatronik Mühendisliği Bölümü Koleksiyonu: Recent submissions
Now showing items 1-20 of 39
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Influence of anisotropy on the deformation behaviour in microtensile 316L steel specimens fabricated by laser powder bed fusion (PBF-LB/M)
(2023)Laser powder bed fusion of metals (PBF LB/M) allows fabrication of intricate structures without any need of tools and moulds. In this process the building orientation becomes a significant issue for the complex structures. ... -
Analyzing the influence of the investment casting process parameters on microstructure and mechanical properties of open-pore Al–7Si foams
(2023)Aluminum alloy foams with high specific compressive strength and good energy absorption capacity are widely used as structural materials and shock absorbers. The investment casting process offers an interesting opportunity ... -
Mechanical performance of reverse-engineered resin foam structures developed by image processing on the computed tomography data: A revisit
(2023)Using digital design methods, additive manufacturing processes enable us to create novel complex structures. In the current study, 3 and 10 ppi, density-graded, and merged foams (digitally joined 3 and 10 ppi) were ... -
Influence of additional strut elements in 3D Re-Entrant auxetic unit cells on the damage and energy absorption properties
(2024)Background Geometric parameter optimization, novel design, and mechanism modeling of auxetic materials have been widely studied. However, manipulating the topology of the 3d printed auxetic unit cells and its influence ... -
Relation between Tensile Strut and Compressive Foam Deformation Behaviour: Failure Mechanisms and the Influence of Dendritic Versus Globular Grain Structure in an AlSi7Mg0.3 (A356) Precision‐Cast Open‐Cell Foam
(2024)Open-cell aluminum foams are gaining importance for the design of lightweightstructures and as electrodes in lithium-ion batteries. AlSi7Mg0.3 foams areproduced by a modified investment casting process. By tuning the mold ... -
Fatigue and corrosion-fatigue behavior of the β-metastableTi-5Al-5Mo-5V-3Cr alloy processed by laser powder bedfusion
(2024)We performed rotating bending tests and axial (tension-compression) loadincrease and constant amplitude high-cycle fatigue tests in air and Hanks' balanced salt solution (HBSS) on the β-metastable titanium alloy Ti-5Al-5Mo-5V3Cr, ... -
Modification of open-cell cast aluminum-silicon foams with strontium
(2024)The mechanical properties of open-cell aluminum foams can be influenced by enhancing the microstructure of the struts. The foams produced by investment casting face slow cooling rates, which makes it challenging to improve ... -
Micro and nano damage observations of martensitic and austenitic open cell cast foams
(Elsevier Science, 2022)In current study a detailed investigation of the 304 austenitic and 420 martensitic foams damage has been carried out at all hierarchical levels. In-situ compression testing of foams and microtensile testing of single ... -
Experimental study of the impact of electrospinning parameters on the electromechanical properties of strain sensitive electrospun multiwalled carbon nanotubes/ thermoplastic polyurethane nanofibers
(Taylor & Francis, 2021)Flexible strain sensitive electrospun fibrous layers have attracted widespread attention of researchers owing to their large surface area and exceptional flexibility. Herein, a detailed research on the impact of electrospinning ... -
Stewart platform based robot design and control for passive exercises in ankle and knee rehabilitation
(Gazı University Faculty Engineering Architecture, 2021)Nowadays, usage of robots in industry and daily life is increasing, additionally, different robot designs are developed in order to fulfill the applications optimally by means of robots. Parallel robots have a restricted ... -
Modeling of complex gray cast iron open-cell foams revealing insights on failure and deformation on different hierarchical length-scales
(Wiley-VCH, 2021)Open-cell gray cast iron foams are a class of porous materials of increasing interest, with great potential to be used in energy damping applications and for sound isolation. We created finite element (FE) models from 3D ... -
Performance analysis of HQAM based spatial modulation over Nakagami-m Fading Channels
(Institute of Electrical and Electronics Engineers, 2020)In this study, the performance analysis of the recently proposed Hexagonal Square Amplitude Modulation Spatial Modulation (HQAM-SM) system on Nakagami-m fading channels is presented. Performance analysis was performed ... -
Performance analysis of Hexagonal QAM constellations on quadrature spatial modulation with perfect and imperfect channel estimation
(Elsevier, 2021)In this study, the quadrature spatial modulation (QSM) technique, which is a rational multiple-input multiple-output (MIMO) transmission technique and frequently encountered in recent studies in the literature, and the ... -
Generalized code index modulation and spatial modulation for high rate and energy-efficient MIMO systems on rayleigh block-fading channel
(IEEE, 2021)In this article, a high data rate and energy-efficient multiple-input multiple-output transmission scheme is considered by combining two popular and rational modulation techniques: spatial modulation (SM) and code index ... -
Differential chaos shift keying assisted media-based modulation
(İstanbul Üniversitesi, 2021)This study proposes a new energy-efficient and high data-rated communication technique by combining media-based modulation (MBM) and differential chaos shift keying technique (DCSK), called DCSK–MBM. The MBM technique, ... -
Two-way code index modulation
(Institute of Electrical and Electronics Engineers Inc., 2019)In this study, a new code index modulation (CIM) aided two-way network coded (TW-CIM) scheme with high energy-efficiency, high data speed and good error performance is proposed. In the proposed system model, unlike ... -
Drilling process and resulting surface properties of Inconel 718 alloy fabricated by selective laser melting additive manufacturing
(Elsevier B.V., 2020)One of the challenges is to produce holes with expected dimensional accuracy in metal additive manufacturing. Although post-processing is usually carried out for the additively manufactured components but improving the ... -
Heat treatment temperature-induced microstructure, microhardness and wear resistance of inconel 718 produced by selective laser melting additive manufacturing
(Elsevier GmbH, 2021)Additive manufacturing (AM) has been becoming more widespread and its usage area has been increasing in various industries. However, the mechanical and microstructural properties of the metal parts fabricated by additive ... -
Application of a pnCCD for energy-dispersive Lauc diffraction with ultra-hard X-rays
(Int Union Crystallography, 2015)In this work the spectroscopic performance of a pnCCD detector in the ultra-hard energy range between 40 and 140 keV is tested by means of an energy-dispersive Laue diffraction experiment on a GaAs crystal. About 100 Bragg ... -
Direct and indirect signal detection of 122 keV photons with a novel detector combining a pnCCD and a CsI(T1) scintillator
(Elsevier, 2016)By combining a low noise fully depleted pnCCD detector with a CsI(TI) scintillator, an energy-dispersive area detector can be realized with a high quantum efficiency (QE) in the range from below 1 keV to above 100 keV. In ...
