Two-scale finite element model of multilayer blood chamber of POLVAD_EXT

被引：11
|
作者：
Kopernik, M. [1 ]
Milenin, A. [1 ]
机构：
[1] AGH Univ Sci & Technol, Al Mickiewicza 30, PL-30059 Krakow, Poland
来源：
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING | 2012年 / 12卷 / 02期
关键词：
Nanocoating; Titanium nitride (TiN); Representative volume element (RVE); Ventricular assist device (VAD); Finite element method (FEM); COATINGS; HEART;
D O I：
10.1016/j.acme.2012.04.003
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The latest construction of heart prosthesis-Polish ventricular assist device (POLVAD_EXT) is made of polymer and biocompatible TiN nanocoating. The two-scale model of the POLVAD_EXT is based on the finite element method. The theory of nonlinear elasticity and elasto-plasticity is applied in computations. The model in microscale includes: model of residual stress in TiN nanocoating, working loading of the POLVAD_EXT and profile of surface of deposited TiN nanocoating. The analysis of the stress-strain state is performed in two scales for the blood chamber of the POLVAD_EXT. The verification of the calculated macroresults is prepared by applying Authors' FEM code and experimental digital image correlation data. The computed distributions of stresses and strains in macro- and microscales are helpful to determine the regions of blood chamber of the POLVAD_EXT considered as the failure-source areas. (C) 2012 Politechnika Wroclawska. Published by Elsevier Urban & Partner Sp. z.o.o. All rights reserved.
引用
收藏
页码：178 / 185
页数：8
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