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Modeling Fracture in Nano Materials

  • Huajian Gao
  • Baohua Ji
Part of the Solid Mechanics and Its Applications book series (SMIA, volume 113)

Abstract

The recent surging interest in nanotechnology is providing a strong impetus to understanding fracture processes in nanoscale materials. There are open challenges because many classical concepts of fracture mechanics are no longer applicable as the characteristic dimension of a structure at nanoscale becomes comparable to or smaller than the size of the cohesive zone near a crack tip. In this paper, we apply a top down approach, the recently developed Virtual-Internal-Bond (VIB) method to investigating fracture of such nano-materials. We demonstrate that, at a critical length scale typically on the order of nanometer scale, the fracture mechanism changes from the classical Gri th fracture to one of homogeneous failure near the theoretical strength of solids.

Key words

Nanomaterial size effect fracture modeling cohesive zone 

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Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Huajian Gao
    • 1
  • Baohua Ji
    • 1
  1. 1.Max Planck Institute for Metals ResearchStuttgartGermany

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