|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Computational Materials Discovery and Optimization – From Bulk to Materials Interfaces and 2D Materials
||Modelling of Ni Nanohoneycomb Actuation in Water
||Yuqi Zhang, Alfonso Hing Wan Ngan
|On-Site Speaker (Planned)
In recent experiment, metals with nanostructure such as nanohoneycomb, exhibit potential as artificial muscle upon voltage loading. In this work, a multi-scale, multi-field simulation is used to model the electrochemical actuation behavior. Molecular dynamics simulations with reactive force-field potentials and a modified charge-equilibrium method are used to calculate the surface stress built up in metal, Ni(100), surface in contact with water electrolyte due to a voltage applied across the interface. The calculated surface stress is then used as input in a meso-scale finite-element (FE) model of hexagonal unit and then a macro-scale FE model of bilayered cantilever to calculate the bending of an entire sample which replicates experimental conditions. Our investigation to simulate the electrochemical actuation of a real-sized, nano-porous metallic structure in an electrolytic environment will help understand the actuation mechanism from nano interface activity to macro scale deformation.
||Definite: None Selected