Why do cracks avoid each other?

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Abstract

The experimentally known phenomenon that originally collinear mode I cracks seem to avoid each other before coalescence is studied by investigating the stability of straight crack paths. To this end a periodic array of approximately collinear but slightly curved cracks is considered. Stress intensity factors for modes I and II are derived and the growth of originally straight cracks under mode I conditions is studied after introduction of a disturbance that forces the cracks to deviate from a straight path. It is shown that the straight crack path is unstable, i.e. that tip to tip coalescence will not take place.

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Subject classification (UKÄ) – MANDATORY

  • Applied Mechanics
  • Engineering and Technology
Original languageEnglish
Pages (from-to)37-45
JournalInternational Journal of Fracture
Volume23
Issue number1
Publication statusPublished - 1983
Publication categoryResearch
Peer-reviewedYes