Crack Length Effect on the Fracture Behavior of Single-Crystals and Bi- Crystals of Aluminum
W Velilla-Diaz and HR Zambrano, NANOMATERIALS, 11, 2783 (2021).
Molecular dynamics simulations of cracked nanocrystals of aluminum were performed in order to investigate the crack length and grain boundary effects. Atomistic models of single-crystals and bi-crystals were built considering 11 different crack lengths. Novel approaches based on fracture mechanics concepts were proposed to predict the crack length effect on single-crystals and bi-crystals. The results showed that the effect of the grain boundary on the fracture resistance was beneficial increasing the fracture toughness almost four times for bi-crystals.
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