Prof. Dimitrios G. Aggelis Profile

Prof. Dimitrios G. Aggelis

Professor at Vrije Univ. Brussel

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Author

Publications (37)

Proceedings Article | 18 April 2023 Presentation + Paper

Ultrasonic evaluation of self-healing within cementitious materials

G. Lefever, D. Van Hemelrijck, D. Snoeck, D. Aggelis

Proceedings Volume 12487, 1248714 (2023) https://doi.org/10.1117/12.2659717

KEYWORDS: Ultrasonics, Cements, Sensors, Numerical simulations, Simulations, Polymers

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Proceedings Article | 18 April 2023 Presentation + Paper

Self-healing assessment of cementitious mortars through air-coupled ultrasound

G. Lefever, A. S. Charkieh, D. Van Hemelrijck, D. Snoeck, D. Aggelis

Proceedings Volume 12487, 1248713 (2023) https://doi.org/10.1117/12.2659708

KEYWORDS: Cements, Ultrasonics, Sensors, Signal attenuation, Polymers, Signal to noise ratio

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Proceedings Article | 18 April 2023 Paper

Monitoring of fresh concrete exposed to various environmental conditions using Acoustic Emission (AE) and Digital Image Correlation (DIC)

Eleni Korda, Eleni Tsangouri, Didier Snoeck, Geert De Schutter, Dimitrios Aggelis

Proceedings Volume 12487, 1248712 (2023) https://doi.org/10.1117/12.2662222

KEYWORDS: Digital image correlation, Shrinkage, Environmental monitoring, Cements, Acoustic emission, Speckle pattern, Sensors, Mixtures, Polymers, Matrices

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Proceedings Article | 18 April 2022 Presentation + Paper

Aperture effect on Rayleigh wave measurements on cement media

Nicolas Ospitia, Dimitrios Aggelis, Gerlinde Lefever

Proceedings Volume 12047, 120470M (2022) https://doi.org/10.1117/12.2614395

KEYWORDS: Sensors, Dispersion, Cements, Signal attenuation, Numerical simulations, Wave propagation, Velocity measurements, Phase velocity, Wavefronts, Scattering

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Proceedings Article | 18 April 2022 Presentation + Paper

Evaluation of crack closure by ultrasonic wave transmission

Gerlinde Lefever, Danny Van Hemelrijck, Didier Snoeck, Dimitrios Aggelis

Proceedings Volume 12047, 120470L (2022) https://doi.org/10.1117/12.2614531

KEYWORDS: Signal attenuation, Cements, Ultrasonics, Ultrasonography, Sensors, Polymers, Visualization, Particles, Visual analytics, Velocity measurements

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Proceedings Article | 22 March 2021 Presentation + Paper

Ultrasonic dispersion and attenuation in bubbly liquids

Nicolas Ospitia, Gerlinde Lefever, Dorian Serafin, Danny Van Hemelrijck, Dimitrios Aggelis

Proceedings Volume 11592, 1159211 (2021) https://doi.org/10.1117/12.2584037

KEYWORDS: Ultrasonics, Signal attenuation, Dispersion, Liquids, Cements, Phase velocity, Visualization

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Proceedings Article | 22 March 2021 Paper

Monitoring the fracture behavior of epoxy resin repaired fiber reinforced concrete specimens by acoustic emission

A. Mpalaskas, D. Aggelis, T. Matikas

Proceedings Volume 11591, 1159129 (2021) https://doi.org/10.1117/12.2584603

KEYWORDS: Epoxies, Acoustic emission, Ultrasonography, Nondestructive evaluation, Metals

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Proceedings Article | 22 March 2021 Paper

AE monitoring of the fracture behavior of mortar specimens modified with waterproofing adhesives

A. Mpalaskas, D. Aggelis, T. Matikas

Proceedings Volume 11591, 1159128 (2021) https://doi.org/10.1117/12.2584602

KEYWORDS: Adhesives, Acoustic emission, Ultrasonics, Nondestructive evaluation, Cements

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Proceedings Article | 22 April 2020 Paper

Correlation between acoustic emission parameters and fracture behavior of repaired marble specimens

A. Mpalaskas, D. Aggelis, T. Matikas

Proceedings Volume 11382, 1138213 (2020) https://doi.org/10.1117/12.2557351

KEYWORDS: Acoustic emission, Epoxies, Sensors, Acoustics, Failure analysis, Ultrasonics, Interfaces, Acoustic coupling, Wave propagation, Statistical analysis

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Proceedings Article | 27 March 2018 Presentation + Paper

The synergy of ultrasonic experiments, numerical analyses of wave propagation and scattering theories in cementitious materials

Sokratis Iliopoulos, Lucas De Smet, Dimitrios Aggelis

Proceedings Volume 10601, 1060108 (2018) https://doi.org/10.1117/12.2297193

KEYWORDS: Cements, Signal attenuation, Ultrasonics, Wave propagation, Scattering, Electromagnetic scattering theory, Numerical analysis, Numerical simulations, Dispersion, Sensors, Phase velocity

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Proceedings Article | 19 April 2017 Paper

Experimental investigation of wave dispersion in hardened concrete and reference liquid media

Sokratis Iliopoulos, Fabian Malm, Christian Grosse, Dimitrios Aggelis

Proceedings Volume 10171, 101710O (2017) https://doi.org/10.1117/12.2261664

KEYWORDS: Ultrasonics, Dispersion, Wave propagation, Glasses, Nondestructive evaluation, Sensors, Velocity measurements, Liquids, Material characterization, Pulse generators, Phase velocity, Optical spheres, Signal attenuation, Cements, Phase measurement

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Proceedings Article | 1 April 2016 Paper

Acoustic emission of fire damaged fiber reinforced concrete

A. Mpalaskas, T. Matikas, D. Aggelis

Proceedings Volume 9806, 980618 (2016) https://doi.org/10.1117/12.2220029

KEYWORDS: Acoustic emission, Nondestructive evaluation, Ultrasonics, Atrial fibrillation, Cements, Temperature metrology, Wave plates, Photography, Signal attenuation

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Proceedings Article | 27 March 2015 Paper

Acoustic signatures of different damage modes in plain and repaired granite specimens

A. Mpalaskas, T. Matikas, D. Van Hemelrijck, S. Iliopoulos, G. Papakitsos, D. Aggelis

Proceedings Volume 9439, 94390L (2015) https://doi.org/10.1117/12.2085040

KEYWORDS: Acoustics, Sensors, Epoxies, Metals, Acoustic emission, Wave propagation, Buildings, Nondestructive evaluation, Distortion, Adhesives

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Proceedings Article | 27 March 2015 Paper

Effective combination of DIC, AE, and UPV nondestructive techniques on a scaled model of the Belgian nuclear waste container

Sokratis Iliopoulos, Lou Areias, Lincy Pyl, John Vantomme, Philippe Van Marcke, Erik Coppens, Dimitrios Aggelis

Proceedings Volume 9436, 943606 (2015) https://doi.org/10.1117/12.2084189

KEYWORDS: Digital image correlation, Nondestructive evaluation, Sensors, Ultrasonics, Acoustic emission, Carbon, Corrosion, Cameras, Visualization, Interfaces

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Proceedings Article | 27 March 2015 Paper

New non-local lattice models for the description of wave dispersion in concrete

Sokratis Iliopoulos, Demosthenes Polyzos, Dimitrios Aggelis

Proceedings Volume 9436, 94360C (2015) https://doi.org/10.1117/12.2076953

KEYWORDS: Dispersion, Phase velocity, Wave propagation, Calculus, Data modeling, Ultrasonics, Motion models, Particles, Sensors, Mechanics

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Proceedings Article | 21 April 2014 Paper

Repair monitoring of cracked concrete floor using the impulse response method

Nikolaos Zoidis, Efthymios Tatsis, Christos Vlachopoulos, Anastasios Gotzamanis, Jesper Stærke Clausen, Dimitrios Aggelis, Theodore Matikas

Proceedings Volume 9063, 90630P (2014) https://doi.org/10.1117/12.2045123

KEYWORDS: Ultrasonics, Velocity measurements, Inspection, Nondestructive evaluation, Calibration, Receivers, Wave propagation, Optical inspection, Metals, Transmitters

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Proceedings Article | 10 April 2014 Paper

Monitoring the fracture behavior in ceramic matrix composites by infrared thermography and acoustic emission

Konstantinos Dassios, Evangelos Kordatos, Dimitris Aggelis, Dimitris Exarchos, Theodore Matikas

Proceedings Volume 9063, 90630D (2014) https://doi.org/10.1117/12.2044930

KEYWORDS: Composites, Acoustic emission, Thermography, Ceramics, Nondestructive evaluation, Radiation thermography, Sensors, Thermal modeling, Silicon carbide, Cameras

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Proceedings Article | 10 April 2014 Paper

A qualitative and quantitative investigation of the uncracked and cracked condition of concrete beams using impulse excitation, acoustic emission, and ultrasonic pulse velocity techniques

S. Iliopoulos, A. Iliopoulos, L. Pyl, H. Sol, D. Aggelis

Proceedings Volume 9062, 90620Q (2014) https://doi.org/10.1117/12.2044588

KEYWORDS: Signal attenuation, Acoustic emission, Ultrasonics, Sensors, Nondestructive evaluation, Calibration, Velocity measurements, Cements, Software development, Americium

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Proceedings Article | 9 March 2014 Paper

Influence of geometry on the fracturing behavior of textile reinforced cement monitored by acoustic emission

D. Aggelis, J. Blom, M. El Kadi, J. Wastiels

Proceedings Volume 9063, 90630E (2014) https://doi.org/10.1117/12.2044671

KEYWORDS: Cements, Acoustic emission, Glasses, Composites

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Proceedings Article | 8 March 2014 Paper

Measurement of elastic wave dispersion on human femur tissue

M. Strantza, O. Louis, D. Polyzos, F. Boulpaep, D. Van Hemelrijck, D. Aggelis

Proceedings Volume 9062, 90620T (2014) https://doi.org/10.1117/12.2048393

KEYWORDS: Sensors, Bone, Wave propagation, Dispersion, Tissues, Wavelets, Receivers, Acoustic emission, Signal attenuation, Metals

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Proceedings Article | 8 March 2014 Paper

Acoustic emission signatures of damage modes in concrete

D. Aggelis, A. Mpalaskas, T. Matikas, D. Van Hemelrijck

Proceedings Volume 9062, 90620P (2014) https://doi.org/10.1117/12.2044750

KEYWORDS: Sensors, Acoustic emission, Atrial fibrillation, Acoustics, Cements, Picture Archiving and Communication System, Structural health monitoring, Distortion, Wave plates, Velocity measurements

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Proceedings Article | 16 April 2013 Paper

Acoustic emission signatures of damage modes in structural materials

D. Aggelis, A. Mpalaskas, T. Matikas, D. Van Hemelrijck

Proceedings Volume 8694, 86940T (2013) https://doi.org/10.1117/12.2008942

KEYWORDS: Sensors, Acoustic emission, Wave propagation, Cements, Distortion, Signal attenuation, Metals, Acoustics, Scattering, Receivers

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Proceedings Article | 11 April 2013 Paper

Acoustic emission for fatigue damage monitoring in cross-welded aluminum plates

D. Aggelis, I. Spiridon, T. Matikas

Proceedings Volume 8693, 86930J (2013) https://doi.org/10.1117/12.2009103

KEYWORDS: Acoustic emission, Sensors, Aluminum, Mechanics, Acoustics, Wave propagation, Metals, Picture Archiving and Communication System, Wave plates, Silicon

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Proceedings Article | 11 April 2013 Paper

Monitoring of glass-ceramic composites under static and dynamic loading by combined NDE methods

E. Kordatos, D. Aggelis, K. Dassios, T. Matikas

Proceedings Volume 8693, 86930K (2013) https://doi.org/10.1117/12.2009354

KEYWORDS: Composites, Nondestructive evaluation, Thermography, Acoustic emission, Infrared radiation, Ceramics, Radiation thermography, Infrared cameras, Temperature metrology, Silicon carbide

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Proceedings Article | 30 March 2012 Paper

Influence of propagation distance on the acoustic emission parameters in metal plates

D. Aggelis, T. Matikas

Proceedings Volume 8346, 83460F (2012) https://doi.org/10.1117/12.915011

KEYWORDS: Wave propagation, Metals, Sensors, Acoustic emission, Wave plates, Distortion, Aluminum, Receivers, Numerical simulations, Signal attenuation

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Metal materials and structures are commonly inspected by the acoustic emission (AE) technique. Any event of crack propagation or corrosion development results in the emission of elastic waves which are captured by sensors on the surface of the material. Study of the AE signal incoming rate, as well as qualitative signal parameters, reveals crucial information on the extent of damage and the cracking mode. Based on laboratory experiments, classification criteria are established concerning the type of the active damage source. However, elastic wave propagation in metal plates is dispersive, forcing different frequencies to propagate on different velocities. This leads to shape distortion of the signals, altering their specific features, like duration, amplitude, number of cycles which are crucial for AE characterization. Due to dispersion, an AE event from a single source will be acquired with very different shape in distinct sensor positions and the differences will be accumulated as the propagation path increases. In the present paper numerical simulations of wave propagation in metal plates are conducted. The aim is to investigate plate wave dispersion, not from the classical ultrasonics, but from the AE point of view, quantifying the effect of distance on the shape of the propagating pulses and the specific AE parameters. Indicative experiments on metal plates confirm the effect of distance on the wave parameters. Consequently, a procedure to "correct" the AE parameters based on the propagating distance between the source crack and the sensor is discussed. This way the original AE parameters of the signal as emitted by the source are calculated and the effect of distortion which masks the original content is cleared out. It is shown that any classification scheme based on AE parameters, should incorporate the information of the source location relatively to the sensor since long propagation distance causes strong changes in the waveform, masking the information of the original source.

Proceedings Article | 30 March 2012 Paper

Real-time characterization of damage in ceramic matrix composites using IR thermography and acoustic emission

E. Kordatos, D. Aggelis, K. Dassios, P.-L. Lagari, T. Matikas

Proceedings Volume 8346, 834617 (2012) https://doi.org/10.1117/12.915242

KEYWORDS: Composites, Acoustic emission, Ceramics, Thermography, Nondestructive evaluation, Radiation thermography, Infrared cameras, Sensors, Silicon carbide, Failure analysis

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Proceedings Article | 30 March 2012 Paper

Monitoring the efficiency of plasticizer in fresh cement using ultrasound

D. Aggelis, D. Grammenou, T. Matikas

Proceedings Volume 8346, 83460H (2012) https://doi.org/10.1117/12.915023

KEYWORDS: Cements, Signal attenuation, Ultrasonography, Scattering, Liquids, Wave propagation, Velocity measurements, Dispersion, Time metrology, Sensors

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Proceedings Article | 30 March 2012 Paper

Critical and subcritical damage monitoring of bonded composite repairs using innovative non-destructive techniques

S. Grammatikos, E. Kordatos, D. Aggelis, T. Matikas, A. Paipetis

Proceedings Volume 8346, 834611 (2012) https://doi.org/10.1117/12.915490

KEYWORDS: Composites, Thermography, Acoustic emission, Nondestructive evaluation, Acoustics, Infrared cameras, Carbon, Inspection, Wave propagation, Sensors

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Proceedings Article | 30 March 2012 Paper

Simultaneous acoustic and dielectric real time curing monitoring of epoxy systems

G. Gkikas, Ch. Saganas, S. Grammatikos, D. Aggelis, A. Paipetis

Proceedings Volume 8346, 83461I (2012) https://doi.org/10.1117/12.915481

KEYWORDS: Epoxies, Dielectrics, Polymerization, Sensors, Acoustics, Ultrasonics, Composites, Wave propagation, Control systems, Polymethylmethacrylate

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Proceedings Article | 20 April 2011 Paper

Mechanical degradation of cross-ply laminates monitored by acoustic emission

A. Paipetis, M. Xyrafa, N. Barkoula, T. Matikas, D. Aggelis

Proceedings Volume 7983, 79833D (2011) https://doi.org/10.1117/12.880469

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

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Proceedings Article | 18 April 2011 Paper

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

D. Aggelis, D. Soulioti, E. Gatselou, N. M. Barkoula, A. Paipetis, T. Matikas

Proceedings Volume 7983, 79830V (2011) https://doi.org/10.1117/12.880354

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

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Proceedings Article | 15 April 2011 Paper

Monitoring of fatigue damage in metal plates by acoustic emission and thermography

E. Kordatos, D. Aggelis, T. Matikas

Proceedings Volume 7982, 79820V (2011) https://doi.org/10.1117/12.881021

KEYWORDS: Thermography, Acoustic emission, Metals, Aluminum, Sensors, Nondestructive evaluation, Wave propagation, Cameras, Photography, Infrared radiation

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Proceedings Article | 15 April 2011 Paper

Combined NDT methods for characterization of subsurface cracks in concrete

E. Kordatos, M. Strantza, D. Soulioti, T. Matikas, D. Aggelis

Proceedings Volume 7982, 79820W (2011) https://doi.org/10.1117/12.881025

KEYWORDS: Nondestructive evaluation, Thermography, Ultrasonics, Infrared cameras, Corrosion, Sensors, Visualization, Ultrasonography, Velocity measurements, Signal attenuation

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Proceedings Article | 9 April 2010 Paper

Acoustic emission characterization of steel fibre reinforced concrete during bending

D. Aggelis, D. Soulioti, N. Sapouridis, N. Barkoula, A. Paipetis, T. Matikas

Proceedings Volume 7649, 764912 (2010) https://doi.org/10.1117/12.847396

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

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Proceedings Article | 9 April 2010 Paper

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

D. Aggelis, N. Barkoula, T. Matikas, A. Paipetis

Proceedings Volume 7649, 764911 (2010) https://doi.org/10.1117/12.847600

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

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Proceedings Article | 7 April 2009 Paper

Identification of subsurface damage in concrete using one sided wave measurements

D. Aggelis, T, Matikas

Proceedings Volume 7294, 729406 (2009) https://doi.org/10.1117/12.815205

KEYWORDS: Receivers, Wave propagation, Visualization, Velocity measurements, Sensors, Transducers, Corrosion, Acoustic emission, Numerical simulations, Acoustics

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Proceedings Article | 7 April 2009 Paper

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

D. Aggelis, D. Soulioti, N. Barkoula, A. Paipetis, T. Matikas, T. Shiotani

Proceedings Volume 7294, 729407 (2009) https://doi.org/10.1117/12.815202

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

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Showing 5 of 37 publications

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