中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
Vol. 13 Special 1 May 2003 |
(School of Materials Science and Engineering,
Harbin Institute of Technology, Harbin 150001, China)
Abstract:Molecular dynamics (MD) simulation was employed to research the mechanism of bending crack initiation and growth of single crystal aluminium. Bending model of single crystal Al was built by molecular dynamics technique, the bending crack initiation and growth was simulated with Morse potential. The results show that accumulation of strains energy produces the vacancy from the internal of crystal, cracks initiate from vacancy, and vacancy is combined to form nano-crack. Further growth of micro-crack is similar to that of macro-crack. Crack defect promotes crack initiation and growth.
Key words: molecular dynamics simulation; bending crack; initiation; growth