Large-Scale Molecular Dynamics Simulations of Three-Dimensional Ductile Failure
- 20 January 1997
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 78 (3), 479-482
- https://doi.org/10.1103/physrevlett.78.479
Abstract
We have performed massively parallel 3D molecular dynamics simulations with up to 35 million atoms to investigate ductile failure, obtaining mechanistic information at the atomistic level inaccessible to experiment. We observe dislocation loops emitted from the crack front—the first time this has been seen in computer simulations. The sequence of dislocation emission events, essential for establishing an intrinsic ductility criterion, strongly depends on the crystallographic orientation of the crack front and differs strikingly from anything previously conjectured.Keywords
This publication has 16 references indexed in Scilit:
- Dynamic Crack Processes via Molecular DynamicsPhysical Review Letters, 1996
- Kinematic generation of dislocationsPhilosophical Magazine Letters, 1995
- On the continuum versus atomistic descriptions of dislocation nucleation and cleavage in nickelModelling and Simulation in Materials Science and Engineering, 1995
- Fracture simulations using large-scale molecular dynamicsPhysical Review B, 1995
- The activation energy for dislocation nucleation at a crackJournal of the Mechanics and Physics of Solids, 1994
- Crack blunting effects on dislocation emission from cracksPhysical Review Letters, 1994
- Molecular-dynamics simulations of two-dimensional materials at high strain ratesPhysical Review A, 1992
- Dislocation emission at ledges on cracksJournal of Materials Research, 1991
- Crack tip deformation in LiF single crystalsScripta Metallurgica, 1984
- Molecular dynamics simulation of crack tip processes in alpha-iron and copperJournal of Applied Physics, 1983