International Journal of Fracture

, Volume 42, Issue 1, pp 21–40 | Cite as

An analysis of decohesion along an imperfect interface

  • A. Needleman


A cohesive zone type interface model, taking full account of finite geometry changes, is used to study the decohesion of a viscoplastic block from a rigid substrate. The specific boundary value problem analyzed is a plane strain one with the imposed loading corresponding to overall uniaxial straining. The imperfection takes the form of a non-bonded portion of the interface. Dimensional considerations introduce a characteristic length into the formulation and the decohesion mode shifts from more or less uniform separation along the bond line to crack-like propagation as the ratio of block size to characteristic length increases. Field distributions prior to and accompanying propagation are displayed.


Plane Strain Block Size Characteristic Length Field Distribution Cohesive Zone 
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Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • A. Needleman
    • 1
  1. 1.Division of EngineeringBrown UniversityProvidenceUSA

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