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Prediction of damage in cold bulk forming processes

: Zapara, M.; Augenstein, E.; Helm, D.

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Proceedings in applied mathematics and mechanics. PAMM (2014), pp.1037-1040
ISSN: 1617-7061
International Association of Applied Mathematics and Mechanics (GAMM Annual Meeting) <85, 2014, Erlangen>
Bundesministerium für Wirtschaft und Technologie BMWi
IGF 17678N
Conference Paper, Journal Article, Electronic Publication
Fraunhofer IWM ()
metals; bulk forming; voids; damage; failure; simulations

In the present paper a practically relevant extension of the known modelling methods with regard to the description of forming limits of steels typically used in the cold bulk forming is developed and implemented in a commercial finite element code Abaqus. The modeling approach is based on the so-called micromechanical damage concepts which represent the microstructure evolution more detailed than phenomenological models and, therefore, provide better prediction of damage and failure during the forming process. Particularly, the well-known damage models of Gurson as well as Gologanu-Leblond are considered. It is shown that in combination with fracture criteria such models are able to describe failure in bulk forming.