Dr. Dimitris A. Saravanos Profile

Dr. Dimitris A. Saravanos

Professor at Univ of Patras

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Publications (11)

Proceedings Article | 22 March 2021 Presentation + Paper

Piezoelectric energy harvesting from composite beams in geometric nonlinear regime: numerical and experimental approach

Gregorios Kardarakos, Nikolaos Chrysochoidis, Dimitris Varelis, Dimitris Saravanos, Theofanis Plagianakos, Panagiotis Vartholomeos, Nikolaos Leventakis, G. Bolanakis, Nikolaos Margelis, Evangelos Papadopoulos

Proceedings Volume 11588, 115881D (2021) https://doi.org/10.1117/12.2582767

KEYWORDS: Energy harvesting, Composites, Prototyping, Modeling, Internet, Energy efficiency

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Proceedings Article | 19 May 2020 Presentation + Paper

Towards a nonlinear buckled piezoelectric beam system for enhanced electromechanical energy conversion

Dimitris Varelis, Grigorios-Christos Kardarakos, Nikolaos Chrysochoidis, Dimitris Saravanos

Proceedings Volume 11376, 113761C (2020) https://doi.org/10.1117/12.2559218

KEYWORDS: Nonlinear dynamics, Complex systems, Electromechanical design, Energy harvesting, Matrices, Aluminum, Structural dynamics, Mechanics, Bistability, Finite element methods, Piezoelectric effects

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Proceedings Article | 1 April 2019 Presentation + Paper

Analyzing the nonlinear mechanisms in active wave modulation spectroscopy and their Influence on delamination detection in laminated strips and plates

Christoforos Rekatsinas, Nikolaos Chrysochoidis, Dimitris Saravanos

Proceedings Volume 10972, 109721K (2019) https://doi.org/10.1117/12.2515328

KEYWORDS: Composites, Wave propagation, Interfaces, Mechanics, Modulation, Structural health monitoring, Spectroscopy, Ultrasonics, Waveguides

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Proceedings Article | 29 March 2019 Presentation + Paper

Exploration of the partial transformation behaviour of shape memory alloys and its effect on actuation performance

Anargyros Karakalas, Theodoros Machairas, Dimitris Saravanos

Proceedings Volume 10968, 109680D (2019) https://doi.org/10.1117/12.2515340

KEYWORDS: Actuators, Shape memory alloys, Wind turbine technology, Wind energy, Motion controllers, Modeling and simulation, Smart materials, Smart structures

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Proceedings Article | 31 May 2013 Paper

Damage tolerance modeling and validation of a wireless sensory composite panel for a structural health monitoring system

Mohamad Talagani, Frank Abdi, Dimitris Saravanos, Nikos Chrysohoidis, Kamran Nikbin, Rose Ragalini, Irena Rodov

Proceedings Volume 8720, 87200J (2013) https://doi.org/10.1117/12.2017382

KEYWORDS: Composites, Sensors, Failure analysis, Diamond, Structural health monitoring, Diagnostics, Finite element methods, Double positive medium, Skin, Seaborgium

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The paper proposes the diagnostic and prognostic modeling and test validation of a Wireless Integrated Strain Monitoring and Simulation System (WISMOS). The effort verifies a hardware and web based software tool that is able to evaluate and optimize sensorized aerospace composite structures for the purpose of Structural Health Monitoring (SHM). The tool is an extension of an existing suite of an SHM system, based on a diagnostic-prognostic system (DPS) methodology. The goal of the extended SHM-DPS is to apply multi-scale nonlinear physics-based Progressive Failure analyses to the “as-is” structural configuration to determine residual strength, remaining service life, and future inspection intervals and maintenance procedures. The DPS solution meets the JTI Green Regional Aircraft (GRA) goals towards low weight, durable and reliable commercial aircraft. It will take advantage of the currently developed methodologies within the European Clean sky JTI project WISMOS, with the capability to transmit, store and process strain data from a network of wireless sensors (e.g. strain gages, FBGA) and utilize a DPS-based methodology, based on multi scale progressive failure analysis (MS-PFA), to determine structural health and to advice with respect to condition based inspection and maintenance. As part of the validation of the Diagnostic and prognostic system, Carbon/Epoxy ASTM coupons were fabricated and tested to extract the mechanical properties. Subsequently two composite stiffened panels were manufactured, instrumented and tested under compressive loading: 1) an undamaged stiffened buckling panel; and 2) a damaged stiffened buckling panel including an initial diamond cut. Next numerical Finite element models of the two panels were developed and analyzed under test conditions using Multi-Scale Progressive Failure Analysis (an extension of FEM) to evaluate the damage/fracture evolution process, as well as the identification of contributing failure modes. The comparisons between predictions and test results were within 10% accuracy.

Proceedings Article | 28 March 2012 Paper

Phenomenological modeling of induced transformation anisotropy in shape memory alloy actuators

Darren Hartl, Alexandros Solomou, Dimitris Lagoudas, Dimitris Saravanos

Proceedings Volume 8342, 83421M (2012) https://doi.org/10.1117/12.915972

KEYWORDS: Shape memory alloys, 3D modeling, Finite element methods, Calibration, Actuators, Anisotropy, Fourier transforms, Atrial fibrillation, Thermodynamics, Materials processing

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Proceedings Article | 14 April 2011 Paper

Impact damage detection in composites using an active nonlinear acousto-ultrasonic piezoceramic sensor

Nikolaos Chrysochoidis, Anastasios Toulitsis, Dimitris Saravanos

Proceedings Volume 7981, 79810T (2011) https://doi.org/10.1117/12.882117

KEYWORDS: Composites, Sensors, Ultrasonics, Modulation, Semiconducting wafers, Wave plates, Actuators, Damage detection, Structural health monitoring, Wave propagation

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Proceedings Article | 9 April 2009 Paper

On the delamination detection in composite beams with active piezoelectric sensors using non-linear ultrasonics

Nikolaos Chrysochoidis, Antigoni Barouni, Dimitris Saravanos

Proceedings Volume 7295, 72952J (2009) https://doi.org/10.1117/12.816915

KEYWORDS: Ultrasonics, Composites, Sensors, Actuators, Wave propagation, Time-frequency analysis, Structural health monitoring, Active sensors, Signal detection, Waveguides

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Proceedings Article | 1 April 2009 Paper

Piezoresistive behavior of CNT nanocomposites using atomistic and micromechanics models

Theodosis Theodosiou, Dimitris Saravanos

Proceedings Volume 7289, 728918 (2009) https://doi.org/10.1117/12.816943

KEYWORDS: 3D modeling, Resistance, Nanocomposites, Polymers, Chemical species, Carbon nanotubes, Electromechanical design, Dielectrics, Epoxies, Composites

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Proceedings Article | 11 April 2007 Paper

Analytical and experimental evaluation of piezoelectric wafer active sensors performances for Lamb waves based structural health monitoring in composite laminates

Giola Bottai, Nikos Chrysochoidis, Victor Giurgiutiu, Dimitris Saravanos

Proceedings Volume 6532, 65320N (2007) https://doi.org/10.1117/12.714970

KEYWORDS: Composites, Sensors, Dispersion, Wave propagation, Wave plates, Drug discovery, Active sensors, Structural health monitoring, Waveguides, Semiconducting wafers

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Proceedings Article | 4 June 1999 Paper

Mixed multifield finite element formulation for thermopiezoelectric composite shells

Hojun Lee, Dimitris Saravanos

Proceedings Volume 3667, (1999) https://doi.org/10.1117/12.350096

KEYWORDS: Sensors, Composites, Matrices, Thermal modeling, Active sensors, Actuators, Mechanics, Thermal effects, Smart structures, Solid modeling

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Showing 5 of 11 publications

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