Prof. Tadeusz Uhl Profile

Prof. Tadeusz Uhl

Professor at AGH Univ of Science and Technology

SPIE Involvement:

Author

Publications (30)

Proceedings Article | 25 April 2023 Presentation + Paper

Statistical analysis and correlation of small punch test

Maciej Kaliciak, Tadeusz Uhl, Marek Nowak

Proceedings Volume 12488, 124881O (2023) https://doi.org/10.1117/12.2657727

KEYWORDS: Statistical analysis, Materials properties, Testing and analysis, Material fatigue, Deformation, Plastics, Nondestructive evaluation, Tolerancing, Structural health monitoring, Standards development

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Proceedings Article | 25 April 2023 Presentation + Paper

Detection of moisture-related damage in GFRP composites using hyperspectral imaging

Jan Długosz, Phong Ba Dao, Wiesław Staszewski, Tadeusz Uhl

Proceedings Volume 12488, 124880S (2023) https://doi.org/10.1117/12.2658873

KEYWORDS: Hyperspectral imaging, Wind turbine technology, Damage detection, Moisture, Machine learning, Detection and tracking algorithms, Composites, Short wave infrared radiation, Reflectivity, Light sources and illumination

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Proceedings Article | 15 May 2020 Presentation + Paper

Numerical and experimental investigations of pure MXene(Ti3C2Tx) film and MXene nanocomposites for structural health monitoring

Shreyas Srivatsa, Saurabh Kumar, Krzysztof Grabowski, Pavitra Jain, M. Nayak, Tadeusz Uhl, Prosenjit Sen

Proceedings Volume 11379, 113792J (2020) https://doi.org/10.1117/12.2565041

KEYWORDS: Nanocomposites, Sensors, Structural health monitoring, Nanomaterials, Titanium, Polymers, Finite element methods, Numerical modeling, Chemical elements, Performance modeling

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Proceedings Article | 1 April 2019 Presentation + Paper

Acoustic source localization in anisotropic plates without knowing their material properties: an experimental investigation

Novonil Sen, Mateusz Gawroński, Pawel Packo, Tadeusz Uhl, Tribikram Kundu

Proceedings Volume 10972, 1097224 (2019) https://doi.org/10.1117/12.2513467

KEYWORDS: Sensors, Acoustics, Wavefronts, Wave propagation, Source localization, Anisotropy, Structural health monitoring, Shape analysis, Wave plates, Ultrasonics

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Proceedings Article | 1 April 2019 Open Access

Structural health monitoring: a view of the entrepreneur (Conference Presentation)

Tadeusz Uhl

Proceedings Volume 10972, 1097203 (2019) https://doi.org/10.1117/12.2514484

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Proceedings Article | 28 April 2017 Presentation + Paper

Optimization of multi-scale modelling of CNT/polymer composite strain sensors

Krzysztof Grabowski, Izabela Blacha, Wieslaw Staszewski, Tadeusz Uhl, Pawel Packo

Proceedings Volume 10170, 101700R (2017) https://doi.org/10.1117/12.2260305

KEYWORDS: Sensors, Optimization (mathematics), Modeling, Composites, Carbon, Carbon nanotubes, Computer simulations, Nanocomposites, Microelectromechanical systems, Statistical analysis, Error analysis

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Carbon nanotube-based composites have been deeply investigated in recent years. CNTs due to their unique physical properties have been employed for various applications in different disciplines of science and engineering. Due to the remarkable electrical conductivity of CNTs, one of practical applications is related to the development of strain sensing smart coatings. Up to now, high sensitivity strain sensors for micro- and macro-scale applications were proposed. However, controlling electro-mechanical properties of those devices is still a challenging issue.

In order to facilitate the design process and to investigate multi-domain relationships between sensor's parameters and its properties, numerical models and simulations of CNT-based structures have been carried out with the primary focus on investigation of electrical conductivity for various concentrations of CNTs within the composite material. More accurate and detailed studies include analysis of the influence of deformation on changes in conductivity. However, due to significant microstructural complexity of the system (i.e. large number of CNTs within the structure) multiscale modeling and analysis approach must be employed.

The main objective of this paper is to outline an relationships between micro- and macro-structural properties of CNT-based strain sensors and to discuss guidelines for a multiscale electro-mechanical model based on the Representative Volume Element (RVE) concept. The device employs the change in electrical conductivity of a CNT-based nanocomposite under applied deformation. The study investigates the impact of various micro-scale model parameters (e.g. size of an RVE, CNTs parameters etc.), on the macro scale model. Model parameters convergence studies are performed for different geometrical properties of CNTs and for various sizes of RVEs - revealing their critical mutual relationships. Also, the impact of boundary conditions at the micro-scale RVE structure is discussed.

Proceedings Article | 28 April 2017 Paper

Local numerical modelling of ultrasonic guided waves in linear and nonlinear media

Pawel Packo, Rafal Radecki, Piotr Kijanka, Wieslaw Staszewski, Tadeusz Uhl, Michael Leamy

Proceedings Volume 10170, 1017023 (2017) https://doi.org/10.1117/12.2260175

KEYWORDS: Chemical elements, Numerical analysis, Copper, Dispersion, Numerical simulations, Wave propagation, Numerical modeling, Waveguides, Computer simulations, Systems modeling, Ultrasonics, Modeling, Complex systems, Harmonic generation, Nanoimprint lithography

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Proceedings Article | 28 April 2017 Paper

Nonlinear dispersion effects in elastic plates: numerical modelling and validation

Piotr Kijanka, Rafal Radecki, Pawel Packo, Wieslaw Staszewski, Tadeusz Uhl, Michael Leamy

Proceedings Volume 10170, 101701U (2017) https://doi.org/10.1117/12.2260171

KEYWORDS: Neodymium, Copper, Chemical elements, Computer simulations, Nanoimprint lithography, Numerical analysis, Systems modeling, Wave propagation, Modeling, Ultrasonics, Waveguides, Numerical modeling, Wave plates, Harmonic generation, Nonlinear optics, Structural health monitoring, Signal detection

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Proceedings Article | 20 April 2016 Paper

Optimization of ultrasonic transducers for selective guided wave actuation

Mateusz Miszczynski, Pawel Packo, Paulina Zbyrad, Tadeusz Stepinski, Tadeusz Uhl, Jerzy Lis, Kazimierz Wiatr

Proceedings Volume 9803, 98030J (2016) https://doi.org/10.1117/12.2219548

KEYWORDS: Waveguides, Transducers, Ultrasonics, Optimization (mathematics), Structural health monitoring, Finite element methods, Nondestructive evaluation, Genetic algorithms, Solids, Ferroelectric materials, Chemical elements

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Proceedings Article | 20 April 2016 Paper

Electrical conductivity of nanocomposites based on carbon nanotubes: a 3D multiscale modeling approach

Krzysztof Grabowski, Paulina Zbyrad, Wieslaw Staszewski, Tadeusz Uhl, Kazimierz Wiatr, Pawel Packo

Proceedings Volume 9803, 98030O (2016) https://doi.org/10.1117/12.2219275

KEYWORDS: Carbon nanotubes, Sensors, Nanocomposites, 3D modeling, Composites, Resistance, Resistors, Aluminum

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Proceedings Article | 1 April 2016 Paper

Acoustic emission source localization based on distance domain signal representation

M. Gawronski, K. Grabowski, P. Russek, W. Staszewski, T. Uhl, P. Packo

Proceedings Volume 9805, 98050I (2016) https://doi.org/10.1117/12.2219044

KEYWORDS: Acoustic emission, Source localization, Wave propagation, Nondestructive evaluation, Damage detection, Sensors, Transducers, Signal processing, Error analysis, Signal analysis

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Proceedings Article | 1 April 2016 Paper

Development of novel general equation for multistage epicyclic gearset with corrected teeth: fixed-speed approach

Piotr Kijanka, Adam Jablonski, Ziemowit Dworakowski, Kajetan Dziedziech, Tadeusz Uhl

Proceedings Volume 9805, 98051T (2016) https://doi.org/10.1117/12.2218889

KEYWORDS: Wind turbine technology, Virtual colonoscopy, Kinematics, Curium, Stars, Chemical elements

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Proceedings Article | 1 April 2016 Paper

Development of novel general equation for multistage epicyclic gearset with corrected teeth: non-constrained approach

Piotr Kijanka, Adam Jablonski, Kajetan Dziedziech, Ziemowit Dworakowski, Tadeusz Uhl

Proceedings Volume 9806, 98060G (2016) https://doi.org/10.1117/12.2218886

KEYWORDS: Wind turbine technology, Teeth, Mining, Chemical elements, Wind energy, Sun, Kinematics, Planets, Curium, Stars, Chlorine

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Proceedings Article | 1 April 2016 Paper

Amplitude-dependent contraction/elongation of nonlinear Lamb waves

Pawel Packo, Wieslaw Staszewski, Tadeusz Uhl, Michael Leamy

Proceedings Volume 9805, 98050K (2016) https://doi.org/10.1117/12.2219042

KEYWORDS: Waveguides, Wave plates, Numerical simulations, Nondestructive evaluation, Structural health monitoring, Wavelength tuning, Aluminum, Wave propagation, Mechanical engineering, Biological research, Systems modeling

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Proceedings Article | 7 May 2015 Paper

Perturbation approach to dispersion curves calculation for nonlinear Lamb waves

Pawel Packo, Wieslaw Staszewski, Tadeusz Uhl, Michael Leamy

Proceedings Volume 9438, 94381V (2015) https://doi.org/10.1117/12.2084300

KEYWORDS: Dispersion, Wave propagation, Waveguides, Wave plates, Harmonic generation, Aluminum, Analytical research, Numerical simulations, Nanoimprint lithography, Damage detection

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Proceedings Article | 13 April 2015 Paper

Distance-domain based localization techniques for acoustic emission sources: a comparative study

Krzysztof Grabowski, Mateusz Gawronski, Hayato Nakatani, Pawel Packo, Ireneusz Baran, Wojciech Spychalski, Wieslaw Staszewski, Tadeusz Uhl, Tribikram Kundu

Proceedings Volume 9438, 94381T (2015) https://doi.org/10.1117/12.2084296

KEYWORDS: Sensors, Wave propagation, Acoustic emission, Source localization, Acoustics, Wave plates, Signal processing, Aluminum, Distortion, Transducers

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Proceedings Article | 3 April 2015 Paper

Peridynamics as an analysis tool for wave propagation in graphene nanoribbons

A. Martowicz, W. Staszewski, M. Ruzzene, T. Uhl

Proceedings Volume 9435, 94350I (2015) https://doi.org/10.1117/12.2084312

KEYWORDS: Graphene, Wave propagation, Dispersion, Particles, Carbon, Phase velocity, Chemical species, Systems modeling, Nanostructures, 3D modeling

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Proceedings Article | 1 April 2015 Paper

Separation of Lamb waves modes using polarization filter of 3D laser measured signals

Lukasz Ambrozinski, Tadeusz Stepinski, Tadeusz Uhl

Proceedings Volume 9437, 94371E (2015) https://doi.org/10.1117/12.2084047

KEYWORDS: Polarization, Wave propagation, Phase shifts, Elliptical polarization, 3D metrology, Particles, Filtering (signal processing), Signal processing, 3D scanning, Electronic filtering

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Proceedings Article | 23 March 2015 Paper

Damage imaging in nonlinear vibro-acoustic modulation tests

Lukasz Pieczonka, Andrzej Klepka, Tadeusz Uhl, Wieslaw Staszewski

Proceedings Volume 9438, 94380E (2015) https://doi.org/10.1117/12.2084363

KEYWORDS: Modulation, Composites, Damage detection, Shearography, Nondestructive evaluation, Structural health monitoring, Sensors, Transducers, Actuators, Data acquisition

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Proceedings Article | 23 March 2015 Paper

Analysis of Lamb wave dispersion curve sensitivity to material elastic constants in composites

Alberto Gallina, Lukasz Pieczonka, Lukasz Ambrozinski, Pawel Packo, Piotr Nazarko, Tadeusz Uhl, Zenon Waszczyszyn

Proceedings Volume 9438, 94380O (2015) https://doi.org/10.1117/12.2084350

KEYWORDS: Composites, Wave propagation, Electroluminescence, Carbon, Waveguides, Structural health monitoring, Robotics, Numerical analysis, Actuators, Structured optical fibers

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Proceedings Article | 9 March 2014 Paper

2D aperture synthesis for Lamb wave imaging using co-arrays

Lukasz Ambrozinski, Tadeusz Stepinski, Tadeusz Uhl

Proceedings Volume 9064, 90642A (2014) https://doi.org/10.1117/12.2045424

KEYWORDS: Apodization, Phased arrays, Transmitters, Signal processing, Receivers, Image processing, Chemical elements, Transducers, Sensors, Structural health monitoring

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Proceedings Article | 9 March 2014 Paper

A nonlocal finite difference scheme for simulation of wave propagation in 2D models with reduced numerical dispersion

A. Martowicz, M. Ruzzene, W. Staszewski, J. Rimoli, T. Uhl

Proceedings Volume 9064, 90640F (2014) https://doi.org/10.1117/12.2045252

KEYWORDS: Wave propagation, Computer simulations, Composites, Solid modeling, Numerical analysis, Solids, Phase velocity, Spatial resolution, Chemical elements, Wave plates

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Proceedings Article | 9 March 2014 Paper

Local computational strategies for predicting wave propagation in nonlinear media

Michael Leamy, Thibaut Autrusson, Wieslaw Staszewski, Tadeusz Uhl, Pawel Packo

Proceedings Volume 9064, 90641J (2014) https://doi.org/10.1117/12.2045041

KEYWORDS: Nanoimprint lithography, Wave propagation, Interfaces, Protactinium, Computer simulations, Analytical research, Neodymium, Structural health monitoring, Lanthanum, Anisotropy

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Two local computational strategies for modeling elastic wave propagation, namely the Local Interaction Simulation Approach (LISA) and Cellular Automata for Elastodynamics (CAFE), are compared and contrasted in analyzing bulk waves in two-dimensional nonlinear media. Each strategy formulates the problem from the perspective of a cell and its local interactions with other cells, leading to robust treatments of anisotropy, heterogeneity, and nonlinearity. The local approach also enables straight-forward parallelization on high performance computing clusters. While the two share a common local perspective, they differ in two major respects. The first is that CAFE employs both rectangular and triangular cells, while LISA considers only rectangular. The second is that LISA appeared much earlier than CAFE (early 1990’s versus late 2000’s), and as such has been developed to a much greater degree with a multitude of material models, cell-to-cell interactions, loading possibilities, and boundary treatments. A hybrid approach which combines the two is of great interest since the non-uniform mesh capability of the CAFE triangular cell can be readily coupled to LISA’s rectangular grids, taking advantage of the built-in LISA features on the uniform portion of the domain. For linear material domains, the hybrid implementation appears straight-forward since both methods have been shown to recover the same equations in the rectangular case. For nonlinear material domains, the formulations cannot be put into a one-to-one correspondence, and hybrid implementation may be more problematic. This paper addresses these differences by first presenting the underlying formulations, and then computing results for growth of a second harmonic in an introduced bulk pressure wave. Rectangular cells are used in both LISA and CAFE. Results from both approaches are compared to an approximate, analytical solution based on a two-scale field representation. Differences in the LISA and CAFE computed solutions are discussed and recommendations are made for a follow-on hybrid implementation.

Proceedings Article | 17 April 2013 Paper

Temperature effect modelling of piezoceramic transducers used for Lamb wave propagation in damage detection applications

P. Kijanka, P. Packo, W. Staszewski, T. Uhl

Proceedings Volume 8695, 86952C (2013) https://doi.org/10.1117/12.2009645

KEYWORDS: Ferroelectric materials, Transducers, Wave propagation, Damage detection, Numerical simulations, Modeling, Temperature metrology, Aluminum, Wave sensors, Finite element methods

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Proceedings Article | 11 April 2013 Paper

Designing 2D arrays for SHM of planar structures: a review

Tadeusz Stepinski, Lukasz Ambrozinski, Tadeusz Uhl

Proceedings Volume 8694, 86941R (2013) https://doi.org/10.1117/12.2010000

KEYWORDS: Structural health monitoring, Sensors, Phased arrays, Wave propagation, Image resolution, Transmitters, Computer simulations, Transducers, Ultrasonics, Optical simulations

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Monitoring structural integrity of large planar structures that aims at detecting and localizing impact or damage at any point of the structure requires normally a relatively dense network of uniformly distributed ultrasonic sensors. 2-D ultrasonic phased arrays, due to their beam-steering capability and all azimuth angle coverage are a very promising tool for structural health monitoring (SHM) of plate-like structures using Lamb waves (LW). Linear phased arrays that have been proposed for that purpose, produce mirrored image characterized by azimuth dependent resolution, which prevents unequivocal damage localization. 2D arrays do not have this drawback and they are even capable of mode selectivity when generating and receiving LWs. Performance of 2D arrays depends on their topology as well as the number of elements (transducers) used and their spacing in terms of wavelength. In this paper we propose a consistent methodology for three-step: theoretical, numerical and experimental investigation of a diversity of 2D array topologies in SHM applications. In the first step, the theoretical evaluation is performed using frequency-dependent structure transfer function (STF). STF that defines linear propagation of different LWs modes through the dispersive medium enables theoretical investigation of the particular array performance for a predefined tone-burst excitation signal. A dedicated software tool has been developed for the numerical evaluation of 2D array directional characteristics (beampattern) in a specific structure. The simulations are performed using local interaction simulation approach (LISA), implemented using NVIDIA CUDA graphical computation unit (GPU), which enables time-efficient 3D simulations of LWs propagation. Beampatterns of a 2D array can be to some extend evaluated analytically and using numerical simulations; in most cases, however, they require experimental verification. Using scanning laser vibrometer is proposed for that purpose, in a setup where LWs, excited by PZT transmitters of the investigated array are sensed in multiple points corresponding to the locations of the 2D array receiving elements. A virtual receiving sub-array is created in this way and the performance of various array architectures in the reception mode can be evaluated experimentally without the need of physical prototype; a change of topology requires only straightforward modification of the measurement points distribution at the tested structure. For illustration, beampatterns of three symmetrical 2D topologies, i.e., circular, star-shaped and spiralshaped, will be examined in the paper and compared in terms of their beam-width and side-lobes level. The effect of apodization applied to the array elements will be also investigated.

Proceedings Article | 20 April 2012 Paper

Sensor location analysis for nonlinear-acoustics-based damage detection in composite structures

Andrzej Klepka, Wieslaw Staszewski, Francesco Aymerich, Tadeusz Uhl

Proceedings Volume 8348, 83482G (2012) https://doi.org/10.1117/12.915282

KEYWORDS: Modulation, Acoustics, Composites, Sensors, Ultrasonics, Damage detection, Transducers, Actuators, Wave plates, Vibrometry

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Proceedings Article | 18 April 2012 Paper

Elastic waves simulation using CUDA technology and multiple GPU workstations

P. Packo, T. Uhl, W. Staszewski

Proceedings Volume 8348, 83480M (2012) https://doi.org/10.1117/12.915673

KEYWORDS: Wave propagation, Nanoimprint lithography, Ultrasonics, Data modeling, Systems modeling, Computer simulations, Damage detection, Modeling, Numerical simulations, Structural health monitoring

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Proceedings Article | 5 April 2012 Paper

Experimental comparison of 2D arrays topologies for SHM of planar structures

Lukasz Ambrozinski, Pawel Packo, Tadeusz Stepinski, Tadeusz Uhl

Proceedings Volume 8347, 834717 (2012) https://doi.org/10.1117/12.917438

KEYWORDS: Wave propagation, Structural health monitoring, Nanoimprint lithography, Computer simulations, Sensors, Signal processing, Numerical simulations, Transducers, Actuators, Reflectors

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Proceedings Article | 18 April 2011 Paper

CUDA technology for Lamb wave simulations

T. Bielak, P. Packo, A. Spencer, W. Staszewski, T. Uhl, K. Worden

Proceedings Volume 7984, 79842Z (2011) https://doi.org/10.1117/12.886188

KEYWORDS: Nanoimprint lithography, Wave propagation, Numerical simulations, Damage detection, Transducers, Computer simulations, Modeling, Ultrasonics, Waveguides, Aluminum

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Proceedings Article | 9 April 2010 Paper

Effect of boundary conditions on nonlinear acoustics used for impact damage detection in composite structures

Francesco Aymerich, Wieslaw Staszewski, Tadeusz Uhl

Proceedings Volume 7650, 765031 (2010) https://doi.org/10.1117/12.847516

KEYWORDS: Acoustics, Composites, Damage detection, Ultrasonics, Transducers, Modulation, Wave plates, Nondestructive evaluation, Wave propagation, Actuators

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