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.
Non destructive evaluation
Finite element simulations
Finite element method