This study presents a multiscale framework to simulate the effect of nanovoids on the mechanical response of α-Al2O3 at finite temperatures. The bridging cell method, which divides the system into three domains (atomistic, bridging and continuum) and incorporates a finite element method throughout the system, was performed for the simulations. Two important crystal orientations of basal and prismatic planes of α-Al2O3’s hexagonal crystal structure were selected. The simulations were conducted at room temperature, 300K, and fire temperature, 1400K, based on the variety of in-service temperatures alumina is being applied in. The results were compared with respect to deformation behavior, stress distribution and ultimate tensile strength. Results showed different failure mechanism and tensile strength for the two crystal orientations. In addition, the magnitude of stresses and material’s deformation were increased at higher temperatures, where the ultimate tensile strength slightly reduced.

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