A hybrid crack tip element containing a strip-yield crack-tip plasticity model

Karlheinz Kunter, Thomas Heubrandtner, Bettina Suhr, Reinhard Pippan

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This paper presents a model for the simulation of cracks in thin-walled structures using Trefftz-elements (T-elements) for crack tip regions. These elements are based on exact solutions to the governing differential equations and inner boundary conditions, resulting in high resolutions of the stress/strain fields. The T-elements are combined with standard elements using an extended variational principle. Beside this formalism the paper presents the derivation of particular solutions for a straight 2d-crack including a Dugdale strip-yield zone. The results are validated against high-resolution standard finite element simulations. Finally a crack propagation algorithm and some future enhancements are discussed.
Original languageEnglish
Pages (from-to)3-13
JournalEngineering Fracture Mechanics
Publication statusPublished - 2014

Fields of Expertise

  • Mobility & Production

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