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Prediction of piezospectroscopic properties with nanoparticle load transfer theories

G. Freihofer ; D. Fugon ; A. Jones ; Emrecan Ergin (Institutionen för material- och tillverkningsteknik) ; A. Schülzgen ; S. Raghavan ; H. Tat
International SAMPE Technical Conference 2013 p. 1749-1757. (2013)
[Konferensbidrag, övrigt]

Embedded alumina nanoparticles acting as stress sensors enable a wide array of applications for non destructive evaluation and materials testing. This work aims to predict the stress sensitive properties of these nanocomposites through theoretical models and finite element simulations. The Eshelby model is accurate in representing the piezospectroscopic (PS) properties for low volume fractions, but modifications were needed to predict higher volume fractions. An iterative technique which uses the framework of the Eshelby model is able to predict the PS properties for intermediate volume fractions. Finite element models were developed to investigate the effects of various microstructural features on the PS properties. The introduction of isotropic interfaces and neighbouring interacting particles in the model improved correlation with experimental data for higher volume fractions. Microcracks included in the model were capable of creating correlation with experimental data for lower volume fractions. These qualitative results give insight into the direction for future nanoparticle load transfer theories.

Nyckelord: Alumina Nanoparticle, Experimental datum, Finite element simulations, Interacting particles, Iterative technique, Microstructural features, Non destructive evaluation, Theoretical models, Alumina, Engineering education, Exhibitions, Finite element method, Forecasting, Microstructural evolution, Nanoparticles, Sensors, Volume fraction



Denna post skapades 2015-05-05.
CPL Pubid: 216507

 

Institutioner (Chalmers)

Institutionen för material- och tillverkningsteknik

Ämnesområden

Materialteknik

Chalmers infrastruktur