Prof. &#214;zgen &#220;mit &#199;OLAK &#199;AKIR

JOURNAL OF REINFORCED PLASTICS AND COMPOSITES , no.1, pp.1-18, 2023 (SCI-Expanded)

Modeling wide range of viscoelastic–viscoplastic behavior of Araldite LY 564 epoxy using cooperative viscoplasticity theory based on overstress model

Journal of Applied Polymer Science , vol.140, no.9, 2023 (SCI-Expanded)

Functionalized graphene–epoxy nanocomposites: experimental investigation of viscoelastic and viscoplastic behaviors

Colak Ö. Ü., Birkan B., BAKBAK O., ACAR A., Uzunsoy D.

Mechanics of Time-Dependent Materials , vol.27, no.1, pp.185-205, 2023 (SCI-Expanded)

Simplified cooperative viscoplasticity theory based on overstress model for nanocomposites

ÇOLAK ÇAKIR Ö. Ü., UZUNSOY D., Bahlouli N., Francart C.

JOURNAL OF APPLIED POLYMER SCIENCE , vol.139, no.28, pp.1-18, 2022 (SCI-Expanded)

Mechanical characterization of Araldite LY 564 epoxy_ creep, relaxation, quasi-static compression and high strain rate behaviors

BAKBAK O., BİRKAN B. E., ACAR A., Colak Ö. Ü.

Polymer Bulletin , vol.79, no.4, pp.2219-2235, 2022 (SCI-Expanded)

Experimental investigation of oligo cyclic compression behavior of pure epoxy and graphene-epoxy nanocomposites

POLYMER BULLETIN , vol.78, no.12, pp.6935-6952, 2021 (SCI-Expanded)

Investigation of Tensile, Viscoelastic, and Viscoplastic Behavior of Polylactic Acid Manufactured by Fused Deposition Modeling

İstif İ., Feratoglu K., Colak Ö. Ü., Acar A.

JOURNAL OF TESTING AND EVALUATION , vol.49, no.4, pp.2831-2839, 2021 (SCI-Expanded)

High strain rate behavior of graphene-epoxy nanocomposites

Colak Ö. Ü., Bahlouli N., Uzunsoy D., Francart C.

Polymer Testing , vol.81, 2020 (SCI-Expanded)

Material model parameter estimation with genetic algorithm optimization method and modeling of strain and temperature dependent behavior of epoxy resin with cooperative-VBO model

Colak Ö. Ü., Cakir Y.

MECHANICS OF MATERIALS , vol.135, pp.57-66, 2019 (SCI-Expanded)

Cooperative-VBO model for polymer/graphene nanocomposites

ACAR A., Colak O., Correia J., Ahzi S.

Mechanics of Materials , vol.125, pp.1-13, 2018 (SCI-Expanded)

Development of High Purity, Few-Layer Graphene Synthesis by Electric Arc Discharge Technique

Cotul U., Parmak E. D. S., Kaykilarli C., Saray O., Colak Ö. Ü., Uzunsoy D.

ACTA PHYSICA POLONICA A , vol.134, no.1, pp.289-291, 2018 (SCI-Expanded)

Investigation of Mechanical Properties of Graphene and Reduced Graphene Oxide Reinforced Epoxy Matrix Composites

Topal E., Parmak E., Uzunsoy D., ÇOLAK ÇAKIR Ö. Ü.

JOURNAL OF TESTİNG AND EVALUATİON , vol.45, no.4, pp.1182-1191, 2017 (SCI-Expanded)

Synthesis and characterization of graphene-epoxy nanocomposites

Acar A., Colak O. U., Uzunsoy D.

MATERIALS TESTING , vol.57, pp.1001-1005, 2015 (SCI-Expanded)

Modelling of biaxial ratcheting behaviour of ultrahigh-molecular-weight polyethylene with viscoplasticity theory based on overstress for polymers

Colak O. U., ASMAZ K.

POLYMER INTERNATIONAL , vol.64, no.11, pp.1522-1526, 2015 (SCI-Expanded)

Biaxial Ratcheting of Ultra High Molecular Weight Polyethylene: Experiments and Constitutive Modeling

ASMAZ K., Colak O. U., Hassan T.

JOURNAL OF TESTING AND EVALUATION , vol.42, no.6, pp.1486-1492, 2014 (SCI-Expanded)

Investigation of Hygro-Thermal Cycle Effects on the Membranes of Proton Exchange Membrane Fuel Cells

Colak O., ACAR A., Ergenekon E.

JOURNAL OF TESTING AND EVALUATION , vol.42, no.2, pp.285-290, 2014 (SCI-Expanded)

Cooperative viscoplasticity theory based on the overstress approach for modeling large deformation behavior of amorphous polymers

Colak Ö. Ü., Ahzi S., Remond Y.

POLYMER INTERNATIONAL , vol.62, no.11, pp.1560-1565, 2013 (SCI-Expanded)

Modeling of hydro-thermo-mechanical behavior of Nafion NRE212 for Polymer Electrolyte Membrane Fuel Cells using the Finite Viscoplasticity Theory Based on Overstress for Polymers (FVBOP)

Colak O. U., ACAR A.

MECHANICS OF TIME-DEPENDENT MATERIALS , vol.17, no.3, pp.331-347, 2013 (SCI-Expanded)

Uniaxial Strain and Stress-Controlled Cyclic Responses of Ultrahigh Molecular Weight Polyethylene: Experiments and Model Simulations

Hassan T., Colak Ö. Ü., Clayton P. M.

JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME , vol.133, no.2, 2011 (SCI-Expanded)

Determination of material parameters of a viscoplastic model by genetic algorithm

Dusunceli N., Colak Ö. Ü., Filiz C.

MATERIALS & DESIGN , vol.31, no.3, pp.1250-1255, 2010 (SCI-Expanded)

Modelling Effects of Degree of Crystallinity on Mechanical Behavior of Semicrystalline Polymers

Düşünceli N., ÇOLAK ÇAKIR Ö. Ü.

International Journal of Plasticity , vol.24, pp.1224-1242, 2008 (SCI-Expanded)

Kinematic hardening rules for modeling uniaxial and multiaxial ratcheting

Dusunceli N., Colak Ö. Ü.

MATERIALS & DESIGN , vol.29, no.8, pp.1575-1581, 2008 (SCI-Expanded)

The effects of manufacturing techniques on viscoelastic and viscoplastic behavior of high density polyethylene (HDPE)

MATERIALS & DESIGN , vol.29, no.6, pp.1117-1124, 2008 (SCI-Expanded)

High density polyethylene (HDPE): Experiments and modeling

Dusunceli N., Colak Ö. Ü.

MECHANICS OF TIME-DEPENDENT MATERIALS , vol.10, no.4, pp.331-345, 2006 (SCI-Expanded)

Modeling viscoelastic and viscoplastic behavior of high density polyethylene (HDPE)

Colak Ö. Ü., Dusunceli N.

JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME , vol.128, no.4, pp.572-578, 2006 (SCI-Expanded)

High Denstiy Polyethylene (HDPE): Experiments and Modeling

Düşünceli N., ÇOLAK ÇAKIR Ö. Ü.

MECHANICS OF TIME-DEPENDENT MATERIALS , vol.10, pp.331-335, 2006 (SCI-Expanded)

Modeling of the monotonic and cyclic Swift effects using an isotropic, finite viscoplasticity theory based on overstress (FVBO)

Colak Ö. Ü., Krempl E.

INTERNATIONAL JOURNAL OF PLASTICITY , vol.21, no.3, pp.573-588, 2005 (SCI-Expanded)

Modeling deformation behavior of polymers with viscoplasticity theory based on overstress

INTERNATIONAL JOURNAL OF PLASTICITY , vol.21, no.1, pp.145-160, 2005 (SCI-Expanded)

Modeling of the monotonic and cyclic swift effects using anisotropic finite viscoplasticity theory based on overstress (AFVBO): Part I - Constitutive model

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES , vol.41, pp.5301-5311, 2004 (SCI-Expanded)

Modeling of monotonic and cyclic Swift effect using anisotropic finite viscoplasticity theory based on overstress (AFVBO): Part II - Numerical experiments

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES , vol.41, pp.5313-5325, 2004 (SCI-Expanded)

Modeling of large simple shear using a viscoplastic overstress model and classical plasticity model with different objective stress rates

ACTA MECHANICA , vol.167, pp.171-187, 2004 (SCI-Expanded)

Viscoplasticity Theory Applied To Proportional And Non-Proportional Cyclic Loading at Small Strains

INTERNATIONAL JOURNAL OF PLASTICITY , vol.20, no.8, pp.1387-1401, 2004 (SCI-Expanded)

A viscoplasticity theory applied to proportional and non-proportional cyclic loading at small strains

INTERNATIONAL JOURNAL OF PLASTICITY , vol.20, pp.1387-1401, 2004 (SCI-Expanded)

Modeling of Monotonic and Cyclic Swift Effect Using Anisotropic Finite Viscoplasticity Theory Based on Overstress (AFVBO): Part I – Constitutive Model

ÇOLAK ÇAKIR Ö. Ü., Krempl E.

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES , vol.41, pp.5301-5311, 2004 (SCI-Expanded)

Modeling of Uniaxial and Biaxial Ratcheting Behavior of CS 1026 Carbon Steel Using the Simplified Viscoplasticity Theory Based on Overstress (VBO)

ACTA MECHANICA , vol.160, pp.27-44, 2003 (SCI-Expanded)

Compressive failure strengths and modes of woven S2-glass reinforced polyester due to quasi-static and dynamic loading

Khan A., Colak Ö. Ü., Centala P.

INTERNATIONAL JOURNAL OF PLASTICITY , vol.18, no.10, pp.1337-1357, 2002 (SCI-Expanded)

Articles Published in Other Journals 4

Creep compliance of functionalized graphene-epoxy nanocomposites

Journal of Structural Engineering & Applied Mechanics (Online) , vol.7, no.1, pp.24-33, 2024 (Peer-Reviewed Journal)

Effect of graphene on the creep and stress relaxation behaviors of epoxy-nanocomposite in viscoplastic deformation regime

ÇOLAK ÇAKIR Ö. Ü., Çakır Y.

SIGMA JOURNAL OF ENGINEERING AND NATURAL SCIENCES , vol.42, no.1, pp.49-56, 2024 (ESCI)

GENETIC ALGORITHM OPTIMIZATION METHOD FOR PARAMETER ESTIMATION IN THE MODELING OF STORAGE MODULUS OF THERMOPLASTICS

SIGMA JOURNAL OF ENGINEERING AND NATURAL SCIENCES-SIGMA MUHENDISLIK VE FEN BILIMLERI DERGISI , vol.37, no.3, pp.981-988, 2019 (ESCI)

THEORETICAL AND EXPERIMENTAL DEFORMATION ANALYSIS OF CRANE BEAMS SUBJECTED TO MOVING LOAD

AZELOĞLU C. O., Hasan A. G., ÖZEN S., ÇOLAK ÇAKIR Ö. Ü., SAĞIRLI A.

SIGMA JOURNAL OF ENGINEERING AND NATURAL SCIENCES-SIGMA MUHENDISLIK VE FEN BILIMLERI DERGISI , vol.33, no.4, pp.653-663, 2015 (ESCI)

Papers Presented at Peer-Reviewed Scientific Conferences 37

Creep and Relaxation Behavior of Araldite LY564 Epoxy

Birkan B. E., Bakbak O., Çolak Çakır Ö. Ü., Acar A.

"Virtual Congress on Materials Science & Engineering". Materials Info 2020, 9 - 10 November 2020, pp.19

High Strain Rate and Quasi Static Behavior of Araldite LY564 Epoxy

Bakbak O., Birkan B. E., Acar A., Çolak Çakır Ö. Ü., Taşdemirci A.

"Virtual Congress on Materials Science & Engineering". Materials Info 2020, Delaware, United States Of America, 9 - 10 November 2020, pp.20

MECHANICAL PROPERTIES OF FLOWFORMED AISI 1.4330 GUN BARREL

Koltan U., ÇOLAK ÇAKIR Ö. Ü.

1st International Conference on Advances in Mechanical and Mechatronics Engineering, Ankara, Turkey, 08 November 2018, pp.1-6

MACROSCOPIC TESTING AND NANOINDENTATION OF GRAPHENE-EPOXY NANOCOMPOSITES

ÇOLAK ÇAKIR Ö. Ü., Uzunsoy D.

1st International Conference on Advances in Mechanical and Mechatronics Engineering, Ankara, Turkey, 08 November 2018, pp.1-6

MATERIAL MODEL DEVELOPMENT FOR NANOCOMPOSITES AND FINITE ELEMENTS IMPLEMENTATION

ACAR A., ÇOLAK ÇAKIR Ö. Ü.

1st International Conference on Advances in Mechanical and Mechatronics Engineering, Ankara, Turkey, 08 November 2018, pp.1-6

Investigation The Usability Of Spectroscopic Methods For Determining The Existance Of Graphene In Soil And Leaf Of Plants

Çakır Y., ÇOLAK ÇAKIR Ö. Ü.

7th International Conference on Agro-Geoinformatics, Fairfax, United States Of America, 06 August 2017, pp.1-6, (Full Text)

Phytotoxicity of Graphene in Tomatoes and Bean

Çakır Y., ÇOLAK ÇAKIR Ö. Ü.

6th International Conference on Agro-Geoinformatics, Tianjin, China, 18 July 2016, pp.1-8

Processing and Characterisation of few layer graphene sheets by electric Arc Discharge

Uzunsoy D., Çotul U., Saray O., Parmak E., ÇOLAK ÇAKIR Ö. Ü.

13th International Conference on Nansciences and Nanotechnologies (NN16), Thessalonik, Greece, 05 July 2016, pp.279, (Summary Text)

Optimization Of The Crankshaft Journal Bearings In Compressor MTZ 90 MT

Bodur O., ÇOLAK ÇAKIR Ö. Ü.

International Conference On Advances In Mechanical Engineering ICAME 2016, İstanbul, Turkey, 11 May 2016, pp.1-6

Grid Independence Analysis of Computational Fluid Dynamics of a Hydrodynamic Journal Bearing with Microfilm Lubrication

Özen S., ÇOLAK ÇAKIR Ö. Ü.

International Conference On Advances In Mechanical Engineering ICAME 2016, İstanbul, Turkey, 11 May 2016, pp.1-6

Investigation of graphene phytotoxicity in the germination stage of wheat and barley

Çakır Y., ÇOLAK ÇAKIR Ö. Ü.

5th International Conference on Agro-Geoinformatics, İstanbul, Turkey, 20 July 2015, pp.1-6

Biaxial Ratcheting Behavior of Ultra High Molecular Weight Polyethylene (UHMWPE)

ASMAZ K., ÇOLAK ÇAKIR Ö. Ü.

6th International Conference on Polymer Behaviour (ICPB6), Vienna, Austria, 22 September 2014, pp.44

Fabrication and Mechanical Characterization of Graphene–Epoxy Nano Composites

Acar A., ÇOLAK ÇAKIR Ö. Ü., Uzunsoy D.

6th International Conference on Polymeric Behavior, Viena, Austria, 22 September 2014, pp.1-2, (Summary Text)

Determination of Temperature Dependent Elasticity Modulus of PFSA Membranes Using Dynamic Mechanical Analysis (DMA) Technique

14. Uluslar arası Malzeme Sempozyumu (IMPS), 01 September 2012

Cooperative Viscoplasticity Theory Based on Overstress Model for Modeling Amorphous Polymers over a Wide Range of Temperature and Strain Rate

5th International Conference on Polymer Behavior, 01 September 2012

Modeling of Humidity and Temperature Effects on Uniaxial Tension Behavior of Perfluorosulfonic Acid (PFSA) Membran nafion 112