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- Title
Phase‐field‐crystal study on the crack propagation behavior in a nanoscale two‐dimensional lattice in the presence of nonlinear disturbance strains.
- Authors
Hu, Shi; Li, Jianwei; Liu, Quanyi; He, Yuanhua
- Abstract
The nanoscale crack propagation behavior in the presence of nonlinear disturbance strains is studied by using the phase‐field‐crystal method. The influences of amplitude A and frequency ω on fracture mode and crack growth are discussed. The simulation results suggest that the disturbance strains can make fracture mode change between brittle fracture and ductile fracture. When amplitude A is large, increasing frequency ω will lead to the brittle‐to‐ductile transition (BDT). Further increasing ω can make ductile‐to‐brittle transition (DBT) happen. Meanwhile, the value of A can influence the critical frequencies for BDT and DBT. Crack growth is also affected by the disturbance strains. When ω is small, increasing ω or A can accelerate crack growth. When ω is large enough, increasing A will retard it. Through this work, we provide a new way to effectively explore the nanoscale mechanism and behavior of crack propagation.
- Subjects
CRACK propagation (Fracture mechanics); FRACTURE mechanics; DUCTILE fractures; BRITTLE fractures; PHONONIC crystals; CRYSTAL lattices
- Publication
Fatigue & Fracture of Engineering Materials & Structures, 2021, Vol 44, Issue 10, p2706
- ISSN
8756-758X
- Publication type
Article
- DOI
10.1111/ffe.13539