Modelling of surface nanoparticle inclusions for nanomechanical measurements by an AFM or nanoindenter: spatial issues.
Nanotechnology
; 23(16): 165704, 2012 Apr 27.
Article
em En
| MEDLINE
| ID: mdl-22469815
ABSTRACT
Finite element analysis (FEA) is used to model nanoindentation by a rigid, spherically shaped indenter, axially indenting an elastic two phase polymer system comprised of a cylindrical nanoparticle of compliant polymer set in a semi-infinite matrix of stiffer polymer. The cylindrical nanoparticle is normal to the sample surface. An axisymmetric finite element model is used to determine the reduced modulus measured as a function of the indentation depth for various nanoparticle radii and extensions below the surface. We show how the previous simple analytical equations may be extended to describe these situations with accuracy. This gives excellent agreement with the FEA and provides a clear guide to the maximum indentation depth as a function of both the nanoparticle radius and its thickness consistent with a choice of either computation from the analytical equations or direct measurement with a maximum of 10% error in the measured reduced modulus.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Polímeros
/
Modelos Moleculares
/
Microscopia de Força Atômica
/
Nanopartículas
/
Testes de Dureza
/
Modelos Químicos
Idioma:
En
Revista:
Nanotechnology
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Reino Unido