Title :
Nanostructures with shape memory effect: Modelling coupled dynamics
Author :
Dhote, R.P. ; Zu, J. ; Melnik, R.N.V. ; Sebetci, A. ; Gomez, H.
Author_Institution :
Mech. & Ind. Eng., Univ. of Toronto, Toronto, ON, Canada
Abstract :
In this contribution we apply a phase-field (PF) modeling approach for the analysis of properties of shape-memory alloy (SMA) nanostructures, focusing on their complex microstructures and thermo-mechanical behavior. We have developed a model that includes domain walls, treated as a diffuse interface, which leads to a fourth-order differential equation in a strain based order parameter PF model. Arising numerical challenges have been overcome based on the isogeometric analysis (IGA). Microstructure evolutions for different geometries of SMA nanostructures under temperature-induced phase transformations have been studied and some typical examples are presented here.
Keywords :
alloys; differential equations; domains; nanostructured materials; shape memory effects; solid-state phase transformations; surface diffusion; complex microstructures; coupled dynamics modelling; diffuse interface; domain walls; fourth-order differential equation; isogeometric analysis; nanostructures; phase-field modeling approach; shape memory effect; shape-memory alloy; strain-based order parameter; temperature-induced phase transformations; thermo-mechanical behavior; Analytical models; Computational modeling; Geometry; Mathematical model; Microstructure; Nanostructures; Solid modeling; Ginzburg-Landau theory; coupling; isogeometric analysis; low dimensional nanostructures; nonlinear thermo-elasticity; phase-field models;
Conference_Titel :
Electronics and Nanotechnology (ELNANO), 2014 IEEE 34th International Conference on
Conference_Location :
Kyiv
Print_ISBN :
978-1-4799-4581-8
DOI :
10.1109/ELNANO.2014.6873951
