Shear response of beta-SiC bulk dependent on temperature and strain rate

L Wang and QF Liu and WS Yu and SP Shen, ACTA MECHANICA SOLIDA SINICA, 30, 137-144 (2017).

DOI: 10.1016/j.camss.2017.03.008

The shear responses of beta-SiC are investigated using molecular dynamics simulation with the Tersoff interatomic potential. Results show a clear decreasing trend in critical stress, fracture strain and shear modulus as temperature increases. Above a critical temperature, beta-SiC bulk just fractures after the elastic deformation. However, below the critical temperature, an interesting pattern in beta-SiC bulk emerges due to the elongation of Si-C bonds before fracture. Additionally, the shear deformation of beta-SiC at room temperature is found to be dependent on the strain rate. This study may shed light on the deformation mechanism dependent on temperature and strain rate. (C) 2017 Published by Elsevier Ltd on behalf of Chinese Society of Theoretical and Applied Mechanics.

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