Overall thermomechanical properties of layered materials for energy devices applications

TL;DR

This paper analyzes the effective thermomechanical properties of layered materials used in energy devices like SOFCs and batteries, employing asymptotic homogenization to derive thermoelastic constants and compare with finite element results.

Contribution

It applies an asymptotic homogenization method to determine the thermoelastic properties of multi-layered materials relevant for energy devices, providing a new analytical approach.

Findings

Asymptotic homogenization accurately predicts thermoelastic constants.

Thermal stresses significantly influence the material behavior.

Results are validated against finite element analysis.

Abstract

This paper is concerned with the analysis of effective thermomechanical properties of multi- layered materials of interest for solid oxide fuel cells (SOFC) and lithium ions batteries fabrication. The recently developed asymptotic homogenization procedure is applied in order to express the overall thermoelastic constants of the first order equivalent continuum in terms of microfluctuations functions, and these functions are obtained by the solution of the corresponding recursive cell problems. The effects of thermal stresses on periodic multi-layered thermoelastic composite reproducing the characteristics of solid oxide fuel cells (SOFC-like) are studied assuming periodic body forces and heat sources, and the solution derived by means of the asymptotic homogenization approach is compared with the results obtained by finite elements analysis of the associate heterogeneous material.