Search results for: EFM

• The study of harmonic imaging by AFM = Badania harmonicznych w obrazowaniu AFM

  Publication

  • S. Babicz-Kiewlicz

  - Measurement Automation Monitoring - Year 2011

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• Simulation and measurements for the substance identification by AFM

  Publication

  • S. Babicz-Kiewlicz
  • A. Zieliński

  - Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej - Year 2011

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• Morphology of polyurethanes revisited by complementary AFM and TEM

  Publication

  • E. Tocha
  • H. Janik
  • M. Dębowski
  • G. J. Vancso

  - Journal of Macromolecular Science Part B-Physics - Year 2002

  Przedmiotem badań mikroskopowych TEM i AFM były lane segmentowe poliuretany o zawartości 30 i 50% segmentu sztywnego. Stwierdzono obecność sferolitów (poziom mikrometrów), fibryl i globul. Ponadto zastosowanie AFM pozwoliło na zbadanie nanomorfologii badanych poliuretanów. Zaobserwowano krótkie, cylindropodobne domeny segmentów sztywnych rozproszone w matrycy segmentów giętkich.

• Study of displacements of a bridge abutment using FEM

  Publication

  • M. Wymysłowski
  • Z. Kurałowicz

  - Studia Geotechnica et Mechanica - Year 2016

  Steel sheet piles are often used to support excavations for bridge foundations. When they are left in place in the permanent works, they have the potential to increase foundation bearing capacity and reduce displacements; but their presence is not usually taken into account in foundation design. In this article, the results of finite element analysis of a typical abutment foundation, with and without cover of sheet piles, are presented...

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• Macromodels for efficient FEM simulations of waveguides and resonators

  Publication

  • G. Fotyga
  • K. Nyka
  • Ł. Kulas

  - Year 2010

  This paper introduces a novel technique for enhancing the efficiency of the finite element method (FEM) by incorporating special modules, called macromodels, into the standard eigenvalue formulation. The number of unknowns in the separated macromodel subdomain can be significantly reduced by orthogonal projection, using the efficient nodal order reduction algorithm. The idea of macromodels implementation is demonstrated on a simple...

• CFD and FEM model of an underwater vehicle propeller

  Publication

  • T. Chruściel
  • E. Ciba
  • J. Dopke

  - Polish Maritime Research - Year 2014

  During the project execution of design and optimization the Remotely Operated Vehicle (ROV) research on its propulsion has been carried out. The entire project was supported by CFD and FEM calculations, which taking into account the characteristics of underwater vehicle. One of the tasks was to optimize the semi-open duct for horizontal propellers, which provided propulsion and controllability in horizontal plane. In order to...

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• FEM approach to modeling of an irregular trabecular structure

  Publication

  • W. Wojnicz
  • E. Wittbrodt

  - Year 2018

  The aim of the study is elaboration of a method for creating irregular scaffolds that can be used to model the behaviour of trabecular bone placed in the proximal epiphysis of the femur. The scope of the study encompasses creating six numerical models of irregular scaffolds (two solid irregular scaffolds, two shell irregular scaffolds and two shell irregular scaffolds with fortification) and performing numerical analysis of the...

• AFM-assisted investigation of conformal coatings in electronics

  Publication

  • M. Szociński

  - ANTI-CORROSION METHODS AND MATERIALS - Year 2016

  Purpose – This paper aims to presents a new method of investigation of local properties of conformal coatings utilized in microelectronics. Design/methodology/approach – It is based on atomic force microscopy (AFM) technique supplemented with the ability of local electrical measurements, which apart from topography acquisition allows recording of local impedance spectra, impedance imaging and dc current mapping. Potentialities...

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• Modal FEM Analysis of Ferrite Resonant Structures

  Publication

  • M. Warecka
  • G. Fotyga
  • P. Kowalczyk
  • R. Lech
  • M. Mrozowski
  • A. Pacewicz
  • B. Salski
  • J. Krupka

  - IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS - Year 2022

  The finite-element method (FEM) is applied for modal analysis of ferrite-loaded spherical resonators. To improve the efficiency of the numerical calculations, the body-of-revolution (BOR) technique is utilized. Due to the frequency-dependent ferrite permeability, FEM leads to a nonlinear eigenvalue problem that is challenging to solve. To this end, Beyn’s method is proposed. The effectiveness of the proposed approach is confirmed...

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• A two-scale (FEM-DEM) approach for concrete

  Publication

  • M. Nitka
  • Ł. Skarżyński
  • J. Tejchman

  - Year 2013

  Artykuł omawia dwu-skalowe podejście do betonu przy wykorzystaniu modelu Mes i DEM. Metodę elementów skończonych zastosowano na poziomie makro. Na poziomie mikro zastosowano metodę elementów dyskretnych. Macierz sztywności wyznaczono na podstawie tensora naprężeń wyznaczonego w skali mikro. Wyniki numeryczne dwusalowe porównano z wynikami dyskretnymi dla całego obszaru.