Numerical Analysis of Crack Tip Blunting in a Ductile Material under Small-Scale Yielding Subjected to Mixed Mode Loading

  • M. Saka
  • S. Tanaka
  • H. Abé
Conference paper


The blunting of the tip of a crack in a ductile material is analysed under the conditions of plane strain, small-scale yielding, and mixed mode loading of Modes I and II. The stress and strain fields for a sharp crack under mixed mode loading are first determined by means of elastic-plastic finite element analysis. The results obtained for a sharp crack are used as the boundary conditions for the subsequent numerical analysis of crack tip blunting under mixed mode loading, based on slip line theory. The characteristic shapes of the blunted crack tip are obtained for a wide range of Mode I and Mode II combinations, and found to resemble the tip of a Japanese sword. Also the stress field around the blunted crack tip is determined.


Mixed Mode Ductile Material Sharp Crack Mixed Mode Loading Mixed Mode Crack 


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Copyright information

© Springer Japan 1986

Authors and Affiliations

  • M. Saka
    • 1
  • S. Tanaka
    • 2
  • H. Abé
  1. 1.Department of Mechanical EngineeringTohoku UniversitySendai, 980Japan
  2. 2.Toray Industries, Inc.Sonoyama, Otsu, 520Japan

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