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International Journal of Fracture

, Volume 21, Issue 2, pp 83–106 | Cite as

Analysis of crack-tip Moiré fringe patterns

  • H. P. Rossmanith
Article

Abstract

Near crack-tip displacement fields of static brittle cracks in elastic isotropic homogeneous materials are examined. Simple evaluation formulae for determination of stress intensity factorsK1 andK2 are derived employing characteristic properties of the moiré fringes.

Higher order terms of the Westergaard stress function are considered in the analysis, their effect onto the overall moiré fringe pattern is discussed and the associated fringe patterns are classified. It is shown that crack-tip moiré fringe patterns are sensitive to variations of Poisson's ratio.

Keywords

Mechanical Engineer Brittle Civil Engineer Stress Intensity Order Term 
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

On examine les champs de déplacement de fissures fragiles statiques au voisinage de leur extrémité dans des matériaux homogènes isotropes élastiques. En utilisant les propriétés caractéristiques des bandes de moiré, on tire des formules simples d'évaluation pour déterminer les facteurs d'intensité de contraintesK1 andK2.

On considére dans l'analyse les termes d'ordre supérieur de la fonction de contrainte de Westergaard; on discute leur effet sur l'apparence générale des bandes de moiré et l'on classe ainsi les apparences de bandes correspondantes. On montre que les configurations des moirés à l'extrémité de la fissure sont influencés par des variations du module de Poisson.

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Copyright information

© Martinus Nijhoff Publishers 1983

Authors and Affiliations

  • H. P. Rossmanith
    • 1
  1. 1.II. Institut für MechanikUniversität WienViennaAustria

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