Journal
COMPUTATIONAL MECHANICS
Volume 54, Issue 6, Pages 1569-1581Publisher
SPRINGER
DOI: 10.1007/s00466-014-1077-2
Keywords
Nonlinear fracture mechanics; Interface element; Cohesive zone model; Large displacements
Funding
- European Research Council under the European Union's Seventh Framework Programme (FP)/ERC Grant [306622]
- German Federal Ministry for Education and Research (BMBF)
- ERC Starting Grant
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Decohesion undergoing large displacements takes place in a wide range of applications. In these problems, interface element formulations for large displacements should be used to accurately deal with coupled material and geometrical nonlinearities. The present work proposes a consistent derivation of a new interface element for large deformation analyses. The resulting compact derivation leads to an operational formulation that enables the accommodation of any order of kinematic interpolation and constitutive behavior of the interface. The derived interface element has been implemented into the finite element codes FEAP and ABAQUS by means of user-defined routines. The interplay between geometrical and material nonlinearities is investigated by considering two different constitutive models for the interface (tension cut-off and polynomial cohesive zone models) and small or finite deformation for the continuum. Numerical examples are proposed to assess the mesh independency of the new interface element and to demonstrate the robustness of the formulation. A comparison with experimental results for peeling confirms the predictive capabilities of the formulation.
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