About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Quantitative Modelling of the Electromechanical Properties of Piezoelectric Metamaterials for Energy Harvesting Applications |
| Author(s) |
Abhijit Pramanick |
| On-Site Speaker (Planned) |
Abhijit Pramanick |
| Abstract Scope |
Piezoelectric energy harvesting devices can be used for conversion of mechanical vibrational energy to electrical energy that can enable self-supporting operation of portable/embedded micro-devices. Piezoelectric metamaterials can be designed to improve the energy-harvesting efficiency by lowering the effective dielectric permittivity, independent tuning of piezoelectric coefficients (dij) and tuning of acoustic impedance. However, a challenge for the design of piezoelectric metamaterials is quantitative modelling of their anisotropic electromechanical coupling properties. In this regard, a crucial shortcoming of existing models is they do not consider the effect of microscopic phenomena such as domain switching and phase transformation on material properties. We will describe a methodology to integrate multiscale experimental and computational tools within a single framework to address this issue. Specifically, we will demonstrate the combined use of in situ X-ray microdiffraction and micromechanical model to compute and predict the spatial distribution map of different electromechanical coupling coefficients in piezoelectric metamaterial structures. |