Application of a gradient ductile damage model to metal forming processes including crack propagation and mesh adaptivity

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

Samenvatting

The entire process of ductile failure is modelled, from the initiation of damage to crack propagation. The microscopic material degradation mechanisms which trigger cracks are modelled by a softening elastoplastic behaviour. Mesh objectivity is ensured by a gradient enhancement. The two governing partial differential equations, i.e. equilibrium and a nonlocal averaging equation, are solved in a staggered manner, which renders a relatively simple implementation in existing finite element codes. Adaptive remeshing fulfils a threefold purpose: (i) allowing to model the geometry of discrete cracks; (ii) optimising the use of finite elements, so that finer elements are used in the regions of high strain localisation; (iii) preventing large element distortions. A number of metal forming simulations are shown which illustrate the main model features.

Originele taal-2Engels
TitelComputational plasticity : fundamentals and applications. Part 2 : proceedings of the 8th International Conference on Computational Plasticity held in Barcelona, Spain 5th-7th September 2005
Plaats van productieBarcelona
UitgeverijInternational Center for Numerical Methods in Engineering (CIMNE)
Pagina's865-868
Aantal pagina's4
ISBN van geprinte versie849599979X, 9788495999795
StatusGepubliceerd - 1 dec 2005
Evenement8th International Conference on Computational Plasticity: Fundamentals and Applications, COMPLAS VIII - Barcelona, Spanje
Duur: 5 sep 20057 sep 2005

Congres

Congres8th International Conference on Computational Plasticity: Fundamentals and Applications, COMPLAS VIII
LandSpanje
StadBarcelona
Periode5/09/057/09/05

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