Abstract
Fracture formation can be observed in brittle yttria-stabilized zirconia (YSZ) in Ni-YSZ composite anode during high-temperature operation of solid oxide fuel cells (SOFCs). It is quite difficult to predict the fracture formation in solid materials accurately based on the classical continuum mechanics theory, because of the singularity problems in partial differential equations. In this work, an ordinary state-based-peridynamic (OSB-PD) model is proposed to predict the fracture formation in SOFC anode based on real microstructures reconstructed using focused ion beam-scanning electron microscopy (FIB-SEM) dual-beam technique. The key factors determining anode microstructure strength is analyzed based on the simulation results upon the comparison among different anode microstructures. The thermo-mechanical coupling effect is investigated by considering the influence of both external mechanical loads and temperature distribution.
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