Computational Mechanics

, Volume 31, Issue 1, pp 69–77

A cohesive segments method for the simulation of crack growth

  • J. J. C. Remmers
  • R. de Borst
  • A. Needleman

DOI: 10.1007/s00466-002-0394-z

Cite this article as:
Remmers, J., Borst, R. & Needleman, A. Computational Mechanics (2003) 31: 69. doi:10.1007/s00466-002-0394-z
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Abstract

 A numerical method for crack growth is described in which the crack is not regarded as a single discontinuity that propagates continuously. Instead, the crack is represented by a set of overlapping cohesive segments. These cohesive segments are inserted into finite elements as discontinuities in the displacement field by exploiting the partition-of-unity property of shape functions. The cohesive segments can be incorporated at arbitrary locations and orientations and are not tied to any particular mesh direction. The evolution of decohesion of the segments is governed by a cohesive law. The independent specification of bulk and cohesive constitutive relations leads to a characteristic length being introduced into the formulation. The formulation permits both crack nucleation and discontinuous crack growth to be modelled. The implementation is outlined and some numerical examples are presented.

Keywords Crack growth, Fracture, Cohesive zones, Partitions of unity 

Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • J. J. C. Remmers
    • 1
  • R. de Borst
    • 1
  • A. Needleman
    • 2
  1. 1.Faculty of Aerospace Engineering, Koiter Institute Delft, Delft University of Technology, PO Box 5058, 2600 GB, Delft, The Netherlands e-mail: J.J.C.Remmers@LR.TUDelft.nlNL
  2. 2.Division of Engineering, Brown University, Providence, Rhode Island 02912, USAUS

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