Kabakcı, Gamze Çakır

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https://hdl.handle.net/20.500.14411/7044
Name Variants
G.,Kabakci
Kabakci, Gamze Cakir
Gamze Cakir, Kabakci
K.,Gamze Çakır
K.,Gamze Cakir
G. C. Kabakci
K., Gamze Çakır
G., Kabakci
K., Gamze Cakir
G.,Kabakcı
Kabakci,G.C.
Gamze Çakır, Kabakcı
Kabakci G.
G.C.Kabakci
Gamze Çakır, Kabakci
Kabakcı,G.Ç.
G. Ç. Kabakci
Kabakci, Gamze Çakır
G.Ç.Kabakcı
G. Ç. Kabakcı
Kabakcı, Gamze Çakır
Job Title
Araştırma Görevlisi
Email Address
gamze.cakir@atilim.edu.tr
Main Affiliation
Mechanical Engineering
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Website
ORCID ID
Scopus Author ID
57362166400
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID
FZF-6664-2022

Sustainable Development Goals

8

DECENT WORK AND ECONOMIC GROWTH
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1

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12

RESPONSIBLE CONSUMPTION AND PRODUCTION
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1

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14

LIFE BELOW WATER
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1

Research Products
Scholarly Output

5

Articles

4

Citation Count

3

Supervised Theses

1

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2021 - 20255
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Now showing 1 - 5 of 5
  • Thumbnail Image
    Article
    An Investigation of Recycled Rubber Composites Reinforced With Micro Glass Bubbles: an Experimental and Numerical Approach
    (Taylor & Francis Ltd, 2024) Kabakci, Gamze Cakir; Bayraktar, Emin; Aslan, Ozgur; Mechanical Engineering
    Recycled rubber is widely used for its lightweight and cost-effective properties but often has limited mechanical strength, restricting its applications. This study enhances the mechanical performance of devulcanised recycled rubber by reinforcing it with micro glass bubbles (GBs) featuring a density of 0.65 g/cm(3) and an elastic modulus of 3.5 GPa, offering a high strength-to-density ratio. Uniaxial compression tests were conducted on samples with GB volume fractions of 5%, 10%, and 15%. Results were validated through finite element analysis (FEA) in ABAQUS/Standard, incorporating randomised GB distributions. A 2D representative volume element (RVE) with randomly distributed GBs was modelled, applying periodic boundary conditions to simplify the composite into an equivalent homogeneous material. Numerical simulations assessed the effects of GB diameters (30, 40, and 50 mu m) and inclusion size ranges (20-50 mu m and 10-60 mu m), finding minimal impact on results. The RVE, sized at 238 mu m, accurately represented macroscale composite behaviour. Stress-strain behaviour was analysed using average stress and strain tensors. The strong agreement between experimental and numerical results validates the proposed method, demonstrating its accuracy in predicting the mechanical behaviour of the reinforced composite material.
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    Article
    Citation - WoS: 5
    Citation - Scopus: 6
    Toughening Mechanism Analysis of Recycled Rubber-Based Composites Reinforced With Glass Bubbles, Glass Fibers and Alumina Fibers
    (Mdpi, 2021) Kabakci, Gamze Cakir; Aslan, Ozgur; Bayraktar, Emin; Mechanical Engineering
    Recycling of materials attracts considerable attention around the world due to environmental and economic concerns. Recycled rubber is one of the most commonly used recyclable materials in a number of industries, including automotive and aeronautic because of their low weight and cost efficiency. In this research, devulcanized recycled rubber-based composites are designed with glass bubble microsphere, short glass fiber, aluminum chip and fine gamma alumina fiber (gamma-Al2O3) reinforcements. After the determination of the reinforcements with matrix, bending strength and fracture characteristics of the composite are investigated by three-point bending (3PB) tests. Halpin-Tsai homogenization model is adapted to the rubber-based composites to estimate the moduli of the composites. Furthermore, the relevant toughening mechanisms for the most suitable reinforcements are analyzed and stress intensity factor, K-Ic and critical energy release rate, G(Ic) in mode I are determined by 3PB test with single edge notch specimens. In addition, 3PB tests are simulated by finite element analysis and the results are compared with the experimental results. Microstructural and fracture surfaces analysis are carried out by means of scanning electron microscopy (SEM). Mechanical test results show that the reinforcement with glass bubbles, aluminum oxide ceramic fibers and aluminum chips generally increase the fracture toughness of the composites.
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    Article
    A Coupled Modelling and Simulation Approach to Electromagnetic Sheet Metal Forming
    (Taylor & Francis Ltd, 2025) Aslan, Ozgur; Kabakci, Gamze Cakir; Sait, Ferit; Camalan, Caner; Baranoglu, Besim; Bayraktar, Emin; Aerospace Engineering; Mechanical Engineering; Manufacturing Engineering
    This study presents a coupled numerical and experimental investigation of electromagnetic forming (EMF) for aluminium sheets. A custom simulation framework is developed in ABAQUS/Standard using user-defined material (UMAT) and load (DLOAD) subroutines. The magnetic pressure exerted on the workpiece is computed through a finite difference-based solution of Maxwell's equations and applied to the mechanical solver. The mechanical response of the material is modelled using a strain-rate-sensitive plasticity law calibrated for aluminium 7075-O. Experimental forming trials are performed using a custom-built EMF setup, and the results are compared with numerical predictions to validate the model. The comparison shows strong agreement in deformation profiles, confirming the predictive capability of the proposed simulation strategy. This work offers a reliable computational tool for optimising EMF processes and provides insights into material behaviour under high strain rate electromagnetic loading.
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    Doctoral Thesis
    Güçlendirilmiş Polimer Kompozitlerin Deneysel ve Sayısal Analizleri
    (2024) Kabakcı, Gamze Çakır; Aslan, Özgür; Mechanical Engineering
    Taze hurda Düşük Yoğunluklu Polietilen (LDPE) ve Poliüretan (PU) esaslı kompozitler, taze hurda kauçuk ve kısa karbon ve cam elyaf takviyeleri ile tasarlanmış olup, bu malzemelerin sertleşme mekanizmaları, mekanik ve fiziksel özellikleri ile mikroyapısal ve kırılma yüzeyi analizi açısından detaylı olarak araştırılmaktadır. Bu kompozitlerin mekanik özellikleri, temel malzeme karakteristikleri hakkında kritik bilgiler toplamak için kapsamlı bir şekilde incelenmektedir. Matris içindeki takviyelerin hacim yüzdesinin belirlenmesinden sonra, takviyelerin sertleşme mekanizmaları üzerindeki etkilerine odaklanılmaktadır; karbon ve cam elyaf takviyeleri kompozitlerin çok işlevselliklerini artırmak için kullanılmaktadır. Genel karakterizasyonların ardından ek testler ve ölçümler yapılmaktadır. Test sonuçları daha sonra ABAQUS/Standard ile sonlu elemanlar analizi (FEA) kullanılarak sayısal olarak yeniden üretilmektedir. Simülasyonlar, farklı boyutlardaki makroyapılar üzerinde farklı rastgele içeriklerle gerçekleştirilerek sayısal sonuçların tutarlılığı doğrulanmaktadır. Rastgele dağılmış içerikler içeren temsilci hacim elemanları (RVE'ler), homojenleştirme için kullanılmakta ve heterojen kompoziti homojen bir malzeme olarak yaklaşık olarak temsil etmek için periyodik sınır koşulları (PBC'ler) kullanılmaktadır. Heterojen kompozitin gerilme-şekil değiştirme tepkisi, temsili hacim elemanları üzerinde ortalama gerilme ve şekil değiştirme tensörleri değerlendirilerek karakterize edilmektedir. Ayrıca, malzeme modeli, örtük doğrusal olmayan sonlu eleman hesaplamaları için bir kullanıcı altrutini (UMAT) olarak uygulanmaktadır. Sayısal sonuçların deneysel sonuçlarla karşılaştırmalı analizi, simülasyon yaklaşımının güvenilirliğini ve doğruluğunu doğrulamaktadır.
  • Thumbnail Image
    Review
    Citation - WoS: 6
    Citation - Scopus: 9
    A Review on Analysis of Reinforced Recycled Rubber Composites
    (Mdpi, 2022) Kabakci, Gamze Cakir; Aslan, Ozgur; Bayraktar, Emin; Mechanical Engineering
    Rubber recycling attracts considerable attention by a variety of industries around the world due to shrinking resources, increasing cost of raw materials, growing awareness of sustainable development, and environmental issues. Recycled rubber is commonly used in aeronautic, automotive, and transportation industries. In this study, recycled rubber composites designed with different reinforcements in the literature are scrutinized by means of toughening mechanisms, mechanical and physical properties, as well as microstructural and fracture surface analysis. Microscale reinforcements (glass bubbles, alumina fiber, etc.) and nanoscale reinforcements (nanosilica, graphene nanoplatelets, etc.) utilized as reinforcements in rubber composites are thoroughly reviewed. The general mechanical properties reported by previous studies, such as tensile, compressive, and flexural strength, are investigated with the main goal of optimizing the amount of reinforcement used. The majority of the studies on recycled rubber composites show that recycled rubber reinforced with microscale particles leads to the development of physical and mechanical properties of the structures and also provides low-cost and lightweight composites for several application areas. Moreover, recycled rubber containing composites can be suitable for applications where high toughness and high resistance to impact are desirable. The present review aims to demonstrate research on reinforced recycled rubber composites in the literature and prospective outcomes.