Recep Ekici

Recep Ekici
Erciyes Üniversitesi · Department of Mechanical Engineering

PhD

About

32
Publications
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514
Citations

Publications

Publications (32)
Article
Full-text available
This study investigates the low-velocity and ballistic impact responses of SiC reinforced Al 6061 metal-matrix composites in different reinforcement volume fractions. Low-velocity impact (LVI) tests were performed with samples having SiC particle volume fractions of 0, 5, 10, 15, 20, 30, and 40%, while ballistic tests were carried out with samples...
Article
Full-text available
Thanks to their superior mechanical properties, polymer matrix composites have gained considerable importance. In order to improve the impact resistance of polymer matrix composite materials, a new hybrid material known as fiber metal laminate (FML) has been developed. The aim of this study was to reveal the effect of stacking sequence (SS), metal...
Article
Full-text available
The objective of this research was to evaluate the stress and damage occurring on the bone model of D2 quality during implant insertion procedure using a novel dynamic finite element analysis (FEA) modeling. Three-dimensional finite element method was used to simulate the implant placement into the mandible. The cross-sectional model of the implant...
Article
Full-text available
The low‐velocity impact behavior of SiC nanoparticle‐glass fiber‐reinforced polymer matrix composites (PMC) in terms of different weight fraction of nanoparticle, artificial aging time, and impact energy was investigated in this article. In this context, silicon carbide (SiC‐70 nm) ceramic nanoparticle in weight fractions of 0%, 0.1%, 1%, 2%, 3% fi...
Article
Full-text available
This study aimed to investigate experimentally the repeated low-velocity impact behaviors of SiC reinforced aluminum 6061 metal-matrix composites for different volume fractions and energy levels. In addition, the hardness variations were measured by the Vickers hardness tests from the impacted and impact-free cross-sections of the particle reinforc...
Article
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In this study, the production of polymer matrix composite material from prepreg with a hot press, which is a different method from the classical autoclave method, was optimized. The impact behavior of the composite materials produced was investigated. For this, 3mm thick and 90mm diameter aramid reinforced polymer matrix composite samples were prod...
Article
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This study focused on the flexural impact response of cracked sandwich beams repaired by composite patches experimentally and numerically. The sandwich beam members are face-sheets, glass-fiber reinforced plastic (GFRP) composite material, foam core, PVC material, and adhesive layer. The cracked was created on the surface of the top face-sheet to d...
Article
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In this paper, the free vibration analyses of aluminum-foam sandwich structures were completed numerically. Foam and aluminum (Al) were used for the core and surface layers of the sandwich structure, respectively. In addition, an adhesive was used as a thin film. Natural frequencies and mode shapes of the sandwich structure were obtained for differ...
Article
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The damaged area for various structures can be effectively repaired using composite materials. With the effect of impact, damage can occur that cannot be clearly seen in the inner structure of a laminated composite. This can cause delamination and other damage modes in layered composite structures. In this study, three-dimensional dynamic progressi...
Article
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This study addresses the effects of particle volume fraction on the low-velocity impact behavior of B4C particle-reinforced Al6061 metal matrix composites. For this purpose, Al6061 matrix B 4 C reinforced metal matrix composite materials were produced by powder metallurgy method. Metal matrix composite samples were produced by hot pressing in B4C p...
Article
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Low‐velocity impact performance of notched glass fiber reinforced plastic composites repaired by bonding external composite patches was investigated by experimental and numerical methods. Various patches of different fiber materials such as carbon and glass fiber and thickness were considered under different impact energy levels. The continuum dama...
Article
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In this study, the effects of micro-structural parameters such as particle volume fraction, size and random distribution of Al 6061/SiC particulate metal-matrix composite (MMC) beams on free vibration response and the active vibration control are investigated. For this purpose, numerical particle-reinforced MMC (PRMMC) beam specimens were modeled w...
Article
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Adhesive bonding techniqe is used in many engineering applications. Repairs based on adhesively bonded fibre composite patches are becoming widely accepted for repairing cracks or other defects. Patch application to damaged materials with adhesive bonding is used to extend the service life of the material. In this study, patches were bonded damaged...
Article
Full-text available
Composite materials can be subject to dynamic effects such as sudden loading, impact, drop and strike in industrial applications. Such effects cause visible damage or invisible internal defects in materials used in a design. Literature surveys show that the studies on the impact behavior of particle-reinforced metal matrix composites are limited. I...
Article
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Two-dimensional thermoelastic analyses of fully clamped functionally graded rectangular plates (FGRPs) by applying a constant in-plane heat flux from one edge were studied by using Finite Difference Method (FDM) and Finite Element Method (FEM) with temperature-dependent material properties. Some differences about 1.5 to 2 times between FDM and the...
Article
Full-text available
This study investigates the reinforcement effect of particle-reinforced metal matrix composites on the low-velocity impact behaviors. Ceramic SiC (Silicon Carbide) and Pumice (a volcanic lava rock) were used for the reinforcing particles. Finite Element Method (FEM) was used to model and perform the low-velocity impact analyses of SiC and pumice pa...
Article
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This study investigates effects of particle volume fraction and size on the indentation behavior of Al 1080/SiC particle reinforced metal matrix composites based on both 2D simulated and actual micro-structure models using the non-linear finite element method. A simulated micro-structure model assumes randomly distributed square-shaped reinforcemen...
Article
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In this study, Genetic Algorithms (GAs) combined with the proposed neural networks were implemented to the free vibration analysis of an adhesively bonded double containment cantilever joint with a functionally graded plate. The proposed neural networks were trained and tested based on a limited number of data including the natural frequencies and...
Article
Full-text available
This study addresses the effects of impact velocity (impact energy) and particle volume fraction and particle size on the impact behavior of particle-reinforced metal matrix composites (Al 6061/SiC). Their effects on the contact force and plastic dissipation histories, the residual stress, and plastic strain distributions were also analyzed. The im...
Article
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In this study, the layer optimization was carried out for maximizing the lowest (first) fundamental frequency of symmetrically laminated square and rectangular laminated composite plates resting on rigid point supports distributed in eight different arrangements. Genetic Algorithm (GA) was used for searching the optimal stacking sequences of lamina...
Article
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This study addresses the effects of number of layers, compositional gradient exponent (material composition) and random particle dispersion on the indentation behavior of a functionally graded metal matrix composite. The ceramic particles in a certain volume fraction were randomly distributed within each layer depending on the compositional gradien...
Article
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This study investigates the effects of particle size, volume fraction, random dispersion and local concentration underneath a spherical indenter on the indentation response of particle reinforced metal matrix Al 1080/SiC composites. The ceramic particles in certain sizes and volume fractions were randomly distributed through the composite structure...
Article
Full-text available
The present composite structure models assume that reinforcement particles are located in a repeated arrayed order through metal matrix. This study investigates the effect of both random particle distribution and particle volume fraction on the indentation behavior of Al 1080/SiC particle reinforced metal—matrix composites under a spherical indente...
Article
Full-text available
In this study, the loss factors of an adhesively-bonded double containment cantilever joint were determined for different plate and support lengths. The response of the adhesive joint subjected to a transverse excitation force was measured with a contactless eddy-current sensor and the first bending natural frequency was determined using the Fast F...
Article
Full-text available
This study presents three-dimensional free vibration and stress analyses of an adhesively bonded double containment cantilever joint. Modulus of elasticity, Poisson's ratio and density had negligible effect on natural frequencies and mode shapes of adhesive joint. ANN models predicted that support length and plate thickness played important role on...
Article
Full-text available
In this study the layer optimisation was carried out for maximum fundamental frequency of laminated composite plates under any combination of the three classical edge conditions. The optimal stacking sequences of laminated composite plates were searched by means of Genetic Algorithm. The first natural frequencies of the laminated composite plates w...
Article
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This study carries out the three dimensional free vibration analysis of an adhesively bonded corner joint and investigates the effect of an additional horizontal support to the adhesive corner joint with single support on the first ten natural frequencies and mode shapes. In the presence of a horizontal support the effects of the vertical support l...
Article
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This study investigates the three-dimensional stress state of an adhesively bonded double containment cantilever joint in tension. The plate is composed of a functionally graded region between ceramic (Al2O3) top layer and metal (Ni) bottom layer. The mechanical properties of the graded region were defined based on a power law distribution and mode...
Article
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In this paper, the impact behaviour of aluminium and silicon carbide (SiC) particle reinforced aluminium matrix composites under different temperature conditions was determined. Charpy impact tests were performed on as extruded and heat treated specimen at temperatures varying from −176 to 300 °C. Composite specimens based on aluminium alloys of 21...
Conference Paper
Full-text available
In this study the three dimensional vibration analysis of an adhesively bonded cantilevered composite single lap joint was carried out. The first four bending natural frequencies and mode shapes were considered. The back-propagation Artificial Neural Network (ANN) method was used to determine the effects of the fiber angle, fiber volume fraction, o...
Article
Full-text available
This study investigates the three-dimensional free vibration behaviour of an adhesively-bonded corner joint with single support. The modulus of elasticity, Poisson's ratio and density of adhesive were found to have negligible effects on the first 10 natural frequencies and mode shapes of the corner joint. The effects of the geometrical parameters,...

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