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- W2019468981 abstract "The present work has been inspired by a presentation given in the preceding conference of this series (T. Siegmund, W. Brocks, Int. J. Fracture, in print). In this study, a modified Gurson Model has been adopted as a reference solution and the response of classic Cohesive Zone Models (CZM) has been evaluated. It has been shown that the conventional CZM in general is not able to predict the influence of the triaxiality on the failure initiation, and that it is not possible to reproduce the expected reference behaviour with a single set of calibration parameters. In the presented framework of modelling, the feature of mode I failure and its transition to mixed mode failure is incorporated within a Generalized Cohesive Zone Model (GCZM; S. Weihe, Dissertation, 1995). Fracture is initiated by a strength criterion while progressive material degradation is based on energy criteria in analogy to Fracture Mechanics. Complete separation due to fracture is obtained when the critical fracture toughness Gfc has been dissipated, where the actual value of Gfc is dependent on the predicted failure mode. It is shown that the transition to mixed mode failure allows the GCZM to reproduce the varying contributions of modes I and II over the triaxiality regime realistically." @default.
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- W2019468981 date "1999-12-01" @default.
- W2019468981 modified "2023-09-26" @default.
- W2019468981 title "Generalized Cohesive Zone Model: incorporating triaxiality dependent failure mechanisms" @default.
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- W2019468981 doi "https://doi.org/10.1016/s0927-0256(99)00069-5" @default.
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