The characterization of dominating region of fracture (process region) around a crack tip based on the concept of mechanical similarity and atomic mechanics

A. Toshimitsu Yokobori, Yoshiko Nagumo, Takahiro Yajima Toshihito Ohmi

Research output: Contribution to conferencePaperpeer-review

Abstract

Brittle fracture at a crack tip is considered to be caused within a specified local region, that is, process region. However, the determination of this scale has not yet been theoretically clarified. The difficulty of this determination will be due to the wide range scale analysis from the range of nano scale (atomic scale) to macro scale (crack size scale). In this paper, on the basis of the atomic mechanics using super atom and hybrid method of the fractal concept which concerns self-similarity with the proposed analysis of scale projection from macro to nano scales, the disturbed region of atom arrangements around a crack tip were clarified under the local stress field by crack and dislocation. This disturbed region was related to fracture dominating region (process region) which is in good agreement with the scale obtained from experimental consideration by R. Ritchie.

Original languageEnglish
Pages4934-4942
Number of pages9
Publication statusPublished - 2013 Jan 1
Event13th International Conference on Fracture 2013, ICF 2013 - Beijing, China
Duration: 2013 Jun 162013 Jun 21

Other

Other13th International Conference on Fracture 2013, ICF 2013
CountryChina
CityBeijing
Period13/6/1613/6/21

Keywords

  • Atomic mechanics
  • Brittle fracture
  • Mechanical similarity
  • Process region

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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