Computational Fracture Analyses by Means of Virtual Crack Closure Integral Methods

Friedrich-G. Buchholz, Azzedine Chergui, Hans A. Richard


In this paper the capability of Virtual Crack Closure Integral (VCCI) methods regarding the computational fracture
analysis of 2D and 3D crack problems is presented. For the 2D case the accuracy and convergence is verified on the
basis of a reference solution for the CCT specimen and in comparison to other methods. In the 3D cases emphasis is on
the analysis of mixed mode problems involving also local 3D and different mode coupling effects, in particular where a
crack front intersects a free surface. It can be stated that the MVCCI results agree very well with the global behaviour of
the reference solutions but also remarkable deviations are found where mode coupling effects seem not to be covered by
the solutions available from stress analysis handbooks or the literature so far.

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