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Acta Mechanica Sinica

, Volume 10, Issue 3, pp 237–249 | Cite as

Atomistic/continuum simulation of interfacial fracture Part II: Atomistic/dislocation/continuum simulation

  • Tan Honglai
  • Yang Wei
Article

Abstract

Coupled atomistic/dislocation/continuum simulation of interfacial fracture is performed in this paper. The model consists of a nanoscopic core made by atomistic assembly and a surrounding elastic continuum with discrete dislocations. Atomistic dislocations nucleate from the crack tip and move to the continuum layer where they glide according to the dislocation dynamics curve. An atoms/continuum averlapping belt is devised to facilitate the transition between the two scales. The continuum constraint on the atomic assembly is imposed through the mechanics atmosphere along the overlapping belt. Transmissions of mechanics parameters such as displacements, stresses, masses and momenta across the belt are realized. The present model allows us to explore interfacial fracture processes under different mode mixity. The effect of atomistic zigzag interface on the fracture process is revealed: it hinders dislocation emission from the crack tip, especially under high mode mixity.

Key Words

interfacial fracture atomistic/continuum simulation mechanics atmosphere 

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References

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Copyright information

© Chinese Society of Theoretical and Applied Mechanics 1994

Authors and Affiliations

  • Tan Honglai
    • 1
  • Yang Wei
    • 1
  1. 1.Department of Engineering MechanicsTsinghua UniversityBeijingChina

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