The genesis of echelon-mode-I cracks in the neighbourhood of a mode-II-crack tip under uniaxial compression

A. Saimoto, Y. Imai, T. Hashida

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

The mechanical background why the compressed brittle material fails in a shear mode is studied. Compression-induced shear fracture was experienced in a standard compression test of cylindrical mortar sample whereas a mode I crack branching almost parallel to compression was dominant in a cracked specimen. In a uniaxial compression test of artificially-flawed PMMA plate, formation of a number of minute-surface cracks (en echelon cracks) as well as growth of wing cracks emanated from the artificial flaw tips were observed. The damage zone composed by en echelon-mode-I cracks can be considered as a possible source of the macroscopic shear faulting. The relevance between the genesis of en echelon cracks and the compression-induced shear failure is discussed based on experimental observations and numerical analyses.

Original languageEnglish
Pages (from-to)327-332
Number of pages6
JournalKey Engineering Materials
Volume251-252
DOIs
Publication statusPublished - 2003 Jan 1
EventAdvances in Fracture and Damage Mechanics - Paderborn, Germany
Duration: 2003 Sep 22003 Sep 4

Keywords

  • Body force method
  • Compressive fracture
  • Crack coalescence
  • Crack propagation
  • Echelon cracks
  • Failure localization
  • Shear faulting

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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