Dr. Nektaria-Marianthi Barkoula Profile

Dr. Nektaria-Marianthi Barkoula

at Univ of Ioannina

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Publications (16)

PROCEEDINGS ARTICLE | April 21, 2016

Ensuring near-optimum homogeneity and densification levels in nano-reinforced ceramics

Proc. SPIE. 9806, Smart Materials and Nondestructive Evaluation for Energy Systems 2016

KEYWORDS: Ultrasonography, Particles, Light scattering, Ultrasonics, Scanning electron microscopy, Nanocomposites, Spherical lenses, Entangled states, Smart materials, Liquids, Carbon nanotubes

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PROCEEDINGS ARTICLE | March 27, 2015

Rapid chloride permeability test for durability study of carbon nanoreinforced mortar

Proc. SPIE. 9436, Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2015

KEYWORDS: Carbon, Composites, Ions, Diffusion, Corrosion, Power supplies, Quality measurement, Cements, Liquids, Carbon nanotubes

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PROCEEDINGS ARTICLE | March 27, 2015

The effect of different surfactants/plastisizers on the electrical behavior of CNT nano-modified cement mortars

Proc. SPIE. 9436, Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2015

KEYWORDS: Carbon, Chemical species, Electrodes, Crystals, Composites, Hydrogen, Resistance, Cements, Nanocomposites, Carbon nanotubes

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PROCEEDINGS ARTICLE | March 27, 2015

Acoustic emission monitoring of recycled aggregate concrete under bending

Proc. SPIE. 9436, Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2015

KEYWORDS: Atrial fibrillation, Sensors, Particles, Nondestructive evaluation, Cements, Buildings, Transducers, Acoustic emission, Lead, Absorption

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PROCEEDINGS ARTICLE | March 27, 2015

Determination of the dynamic elastic constants of recycled aggregate concrete

Proc. SPIE. 9436, Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2015

KEYWORDS: Ultrasonography, Particles, Nondestructive evaluation, Ultrasonics, Cements, Wave propagation, Transducers, Solids, Velocity measurements, Absorption

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PROCEEDINGS ARTICLE | April 10, 2014

Thermal and electrical behavior of nano-modified cement mortar

Proc. SPIE. 9062, Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2014

KEYWORDS: Infrared cameras, Thermography, Sensors, Electrodes, Resistance, Cements, Thermal effects, Nanocomposites, Radiation thermography, Carbon nanotubes

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PROCEEDINGS ARTICLE | April 3, 2013

Interlaminar shear strength and thermo-mechanical properties of nano-enhanced composite materials under thermal shock

Proc. SPIE. 8689, Behavior and Mechanics of Multifunctional Materials and Composites 2013

KEYWORDS: Carbon, Aerospace engineering, Polymers, Glasses, Composites, Manufacturing, Transmission electron microscopy, Bridges, Epoxies, Carbon nanotubes

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The introduction of nanoscaled reinforcement in otherwise conventional fiber reinforced composite materials has opened an exciting new area in composites research. The unique properties of these materials combined with the design versatility of fibrous composites may offer both enhanced mechanical properties and multiple functionalities which has been a focus area of the aerospace technology on the last decades. Due to unique properties of carbon nanofillers such as huge aspect ratio, extremely large specific surface area as well as high electrical and thermal conductivity, Carbon Nanotubes have benn investigated as multifunvtional materials for electrical, thermal and mechanical applications. In this study, MWCNTs were incorporated in a typical epoxy system using a sonicator. The volume of the nanoreinforcement was 0.5 % by weight. Two different levels of sonication amplitude were used, 50% and 100% respectively. After the sonication, the hardener was introduced in the epoxy, and the system was cured according to the recommended cycle. For comparison purposes, specimens from neat epoxy system were prepared. The thermomechanical properties of the materials manufactured were investigated using a Dynamic Mechanical Analyser. The exposed specimens were subjected to thermal shock. Thermal cycles from +30 °C to -30 °C were carried out and each cycle lasted 24 hours. The thermomechanical properties were studied after 30 cycles . Furthermore, the epoxy systems prepared during the first stage of the study were used for the manufacturing of 16 plies quasi isotropic laminates CFRPs. The modified CFRPs were subjected to thermal shock. For comparison reasons unmodified CFRPs were manufactured and subjected to the same conditions. In addition, the interlaminar shear strength of the specimens was studied using 3-point bending tests before and after the thermal shock. The effect of the nanoreinforcement on the environmental degradation is critically assessed.

PROCEEDINGS ARTICLE | April 6, 2012

Dispersion monitoring of carbon nanotube modified epoxy systems

Proc. SPIE. 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012

KEYWORDS: Sensors, Electrodes, Polymers, Composites, Dielectrics, Ions, Resistance, Epoxies, Inductance, Carbon nanotubes

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PROCEEDINGS ARTICLE | April 20, 2011

Mechanical degradation of cross-ply laminates monitored by acoustic emission

Proc. SPIE. 7983, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011

KEYWORDS: Sensors, Composites, Manufacturing, Nondestructive evaluation, Control systems, Wave propagation, Signal processing, Acoustic emission, Acoustics, Picture Archiving and Communication System

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PROCEEDINGS ARTICLE | April 19, 2011

In service damage assessment of bonded composite repairs with full field thermographic techniques

Proc. SPIE. 7983, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011

KEYWORDS: Thermography, Cameras, Polymers, Composites, Inspection, Nondestructive evaluation, Structured optical fibers, Fiber reinforced polymers, Aluminum, Neodymium

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PROCEEDINGS ARTICLE | April 18, 2011

Effect of fiber surface conditioning on the acoustic emission behavior of steel fiber reinforced concrete

Proc. SPIE. 7983, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011

KEYWORDS: Atrial fibrillation, Sensors, Interfaces, Coating, Signal processing, Acoustic emission, Acoustics, Failure analysis, Fiber coatings, Picture Archiving and Communication System

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PROCEEDINGS ARTICLE | April 9, 2010

Acoustic emission characterization of steel fibre reinforced concrete during bending

Proc. SPIE. 7649, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2010

KEYWORDS: Atrial fibrillation, Sensors, Nondestructive evaluation, Cements, Wave propagation, Signal processing, Acoustic emission, Failure analysis, Fiber characterization, Picture Archiving and Communication System

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PROCEEDINGS ARTICLE | April 9, 2010

Repair integrity monitoring of composite aerostructures using thermographic imaging

Proc. SPIE. 7649, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2010

KEYWORDS: Infrared cameras, Thermography, Infrared imaging, Defect detection, Composites, Manufacturing, Lamps, Inspection, Nondestructive evaluation, Ultrasonics

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PROCEEDINGS ARTICLE | April 9, 2010

Service induced damage in composite laminates: non destructive assessment, quantification and modeling

Proc. SPIE. 7649, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2010

KEYWORDS: Sensors, Composites, Receivers, Ultrasonics, Wave propagation, Transducers, Acoustic emission, Velocity measurements, Acoustics, Systems modeling

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PROCEEDINGS ARTICLE | April 7, 2009

Acoustic emission of steel-fiber concrete under four-point bending

Proc. SPIE. 7294, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2009

KEYWORDS: Homeland security, Aerospace engineering, Sensors, Composites, Interfaces, Nondestructive evaluation, Cements, Materials science, Acoustic emission, Picture Archiving and Communication System

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PROCEEDINGS ARTICLE | March 30, 2009

Nano-enhanced aerospace composites for increased damage tolerance and service life damage monitoring

Proc. SPIE. 7292, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009

KEYWORDS: Carbon, Aerospace engineering, Sensors, Polymers, Composites, Manufacturing, Resistance, Epoxies, Tolerancing, Carbon nanotubes

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Showing 5 of 16 publications

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