Atomistic/continuum simulation of interfacial fracture Part II: Atomistic/dislocation/continuum simulation
- 23 Downloads
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 Wordsinterfacial fracture atomistic/continuum simulation mechanics atmosphere
Unable to display preview. Download preview PDF.
- Tan HL and Yang W. Atomistic/continuum simulation of interfacial fracture, Part I: Atomistic simulation.Acta Mech Sinica, 1994, 10: 151Google Scholar
- Yang W, Tan HL. A combined macro/meso/nanomechanics simulation of interface fracture. IMMM'93, invited lecture, Mie Univ, Tsu, Japan, 1993, 11Google Scholar
- Kanninen MF, Gehlen PC.Int J Fract, 1971, 1: 471Google Scholar
- Mullins M, Dokainish MA.Phil Mag A, 1982, 46: 771Google Scholar
- Zienckiewicz OC. The Finite Element Method. McGraw-Hill, 1977Google Scholar