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International Journal of Fracture

, Volume 23, Issue 1, pp 37–45 | Cite as

Why do cracks avoid each other?

  • Solveig Melin
Article

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.

Keywords

Mechanical Engineer Civil Engineer Stress Intensity Intensity Factor Stress Intensity Factor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Résumé

En analysant la stabilité des chemins rectilignes de fissuration, on étudie le phénomène constaté expérimentalement suivant lequel des fissures colinéaires originellement de mode I semblent s'éviter l'une l'autre avant coalescence. A cette fin, on considère une série périodique de fissures approximativement colinéaires encore que légèrement courbées. Les facteurs d'intensité de contrainte pour les mode I et mode II sont déduits, et on étudie la croissance des fissures originellement droites de mode I après introduction d'une perturbation qui oblige ces fissures à dévier de leur trajet rectiligne. On montre que le chemin de fissuration rectiligne est instable, c'est-à-dire qu'une coalescence d'une extrémité vers une autre extrémité ne peut prendre place.

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Copyright information

© Martinus Nijhoff Publishers 1983

Authors and Affiliations

  • Solveig Melin
    • 1
  1. 1.Division of Solid MechanicsLund Institute of TechnologyLundSweden

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