Comparative analysis of ventricular assist devices (POLVAD and POLVAD_EXT) based on multiscale FEM model

• Autorzy: Milenin A. , Kopernik M.
• Języki publikacji: EN

Abstrakty

EN

The prosthesis - pulsatory ventricular assist device (VAD) - is made of polyurethane (PU) and biocompatible TiN deposited by pulsed laser deposition (PLD) method. The paper discusses the numerical modelling and computer-aided design of such an artificial organ. Two types of VADs: POLVAD and POLVAD_EXT are investigated. The main tasks and assumptions of the computer program developed are presented. The multiscale model of VAD based on finite element method (FEM) is introduced and the analysis of the stress-strain state in macroscale for the blood chamber in both versions of VAD is shown, as well as the verification of the results calculated by applying ABAQUS, a commercial FEM code. The FEM code developed is based on a new approach to the simulation of multilayer materials obtained by using PLD method. The model in microscale includes two components, i.e., model of initial stresses (residual stress) caused by the deposition process and simulation of active loadings observed in the blood chamber of POLVAD and POLVAD_EXT. The computed distributions of stresses and strains in macro- and microscales are helpful in defining precisely the regions of blood chamber, which can be defined as the failure-source areas.

Słowa kluczowe

EN

finite element method (FEM); ventricular assist device (VAD); residual stress; inverse analysis; representative volume element (RVE); titanium nitride (TiN)

PL

metody elementów skończonych (MES); urządzenie wspomagające komorę (VAD); naprężenie; analiza odwrotna; reprezentatywna elementarna objętość (REO); azotek tytanu (TiN)

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Acta of Bioengineering and Biomechanics
• Rocznik: 2011
• Tom: Vol. 13, no. 2
• Strony: 13--23
• Opis fizyczny: Bibliogr. 26 poz., rys., tab.

Twórcy

autor

Milenin A.

autor

Kopernik M.

• Department of Applied Computer Science and Modelling, AGH University of Science and Technology, Kraków

Bibliografia

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