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3D atomistic studies of fatigue behaviour of edge crack (0 0 1) in bcc iron loaded in mode I and II

Authors
Journal
International Journal of Fatigue
0142-1123
Publisher
Elsevier
Volume
66
Identifiers
DOI: 10.1016/j.ijfatigue.2014.03.001
Keywords
  • Fatigue Crack Growth
  • Bcc Iron
  • 3D Atomistic Simulations
  • Molecular Dynamics

Abstract

Abstract We present new results of 3D molecular dynamic simulations of a mechanical response of an edge crack (001)[110] (crack plane/crack front) in a single crystal of bcc iron cyclically loaded in tension mode I and shear mode II at room temperature. Different boundary conditions were tested for mode II. We compare fatigue behaviour of the crack (001) loaded in mode II and I with behaviour of a ductile crack (1¯10)[110] recently studied. The paper brings new information on micromechanism of fatigue crack growth.

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