Prediction of piezospectroscopic properties with nanoparticle load transfer theories
Konferensbidrag (offentliggjort, men ej förlagsutgivet), 2013

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.

Microstructural evolution


Volume fraction

Microstructural features

Non destructive evaluation

Theoretical models

Interacting particles




Iterative technique

Finite element simulations

Experimental datum

Engineering education

Finite element method

Alumina Nanoparticle



G. Freihofer

University of Central Florida

D. Fugon

University of Central Florida

A. Jones

University of Central Florida

Emrecan Ergin

Chalmers, Material- och tillverkningsteknik, Yt- och mikrostrukturteknik

A. Schülzgen

University of Central Florida

S. Raghavan

University of Central Florida

H. Tat

Boeing Corporation

International SAMPE Technical Conference 2013