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M. Springer, A. Turon, H. E. Pettermann:
"A Cyclic Cohesive Zone Model for Variable Amplitude Loading and Mixed Mode Behavior";
Vortrag: 6th ECCOMAS Thematic Conference on the Mechanical Response of Composites: COMPOSITES 2017, Eindhoven; 20.09.2017 - 22.09.2017; in: "6th ECCOMAS Thematic Conference on the Mechanical Response of Composites: COMPOSITES 2017", J.J.C. Remmers, A. Turon (Hrg.); TU Eindhoven, (2017), S. 48 - 59.

A Cyclic Cohesive Zone Model is developed which is an extension of an exponential traction-separation law describing the quasi-static constitutive behavior of the interface. Damage degradation under fatigue loading is accounted in a cycle-by-cycle analysis. A Paris´ law type formulation is utilized to model fatigue damage which is based on physically interpretable interface properties, overcoming the need of any parameter fitting. Mixed-Mode loading is considered by the BK-criterion. Varying load amplitudes are captured by the model formulation. For constant amplitude loading or slowly changing load amplitudes a cycle jump technique is implemented to decrease the computational time. The model is implemented within the framework of the Finite Element Method and includes non-local evaluation of structural parameters. Finally, the proposed model is demonstrated on Mode I, Mode II, and Mixed-Mode delamination tests of carbon/epoxy laminates.