Crack Length Effect on the Fracture Behavior of Single-Crystals and Bi-Crystals of Aluminum
Nanomaterials(2021)
摘要
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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关键词
fracture toughness,crack length effect,grain boundary,bi-crystals,single-crystals,molecular dynamics simulations
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