Dr. Krzysztof Grabowski Profile

Dr. Krzysztof Grabowski

at AGH Univ of Science and Technology

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Author

Publications (5)

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 | 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 | 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 | 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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