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Mode II and Mixed Mode Fracture of Single Layer Graphene Sheet

단층 그래핀시트의 모드 II 및 혼합모드 파괴

  • 웬민키 (울산대학교 기계공학부) ;
  • 염영진 (울산대학교 기계공학부)
  • Received : 2013.05.06
  • Accepted : 2013.12.09
  • Published : 2014.02.01

Abstract

The mode II fracture behavior of a single-layer graphene sheet (SLGS) containing a center crack was characterized with the results of an atomistic simulation and an analytical model. The fracture of zigzag graphene models was analyzed with molecular dynamics and the mode II fracture toughness was found to be $2.04MPa{\sqrt{m}}$. The in-plane shear fracture of a cellular material was analyzed theoretically for deriving the $K_{IIc}$ of SLGS, and FEM results were obtained. Mixed-mode fracture of SLGS was studied for various mode I and mode II ratios. The mixed-mode fracture criterion was determined, and the obtained fracture envelope was in good agreement with that of another study.

Keywords

Fracture of Grapheme;Mode II Fracture Toughness;Mixed Mode Fracture

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