Open AccessStudy on Fracture Parameters of Stress Corrosion Cracking Tip of AA6082 Alloy at the Microscopic Scale
Author(s) -
Jia Song,
Fan Ding,
Wenheng Wu,
Liming Lei,
Liang Zhang,
Zhibin Gao
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2002/1/012001
Subject(s) - materials science , stress corrosion cracking , alloy , von mises yield criterion , oxide , stress (linguistics) , crack closure , composite material , yield (engineering) , fracture (geology) , metallurgy , crack tip opening displacement , cracking , stress intensity factor , finite element method , structural engineering , fracture mechanics , engineering , linguistics , philosophy
A two-dimensional finite element model is used to explore the fracture parameter in the tip region of stress corrosion crack (SCC) of AA6082 alloy. Based on the ABAQUS code, we investigate the effect of oxide film’s yield stress on the Mises stress and equivalent plastic strain (PEEQ) in the crack tip. The results show that as the yield strength of oxide film increases, the Mises stress and PEEQ of base alloy in crack tip area both decrease, and the stress of oxide film in crack tip also reduces, but the strain increases. This is because the oxide film bears more load, so the load on the base alloy of the crack tip becomes smaller, resulting in a reduction in the stress and strain on the base.