A new material model for magnesium extrusions has been developed and was implemented in explicit Finite Element software. In this paper the development of the material model that can be used for FEM crash analysis of extruded magnesium components is described. The steps of the development from the material characterization to the validation samples and a first application for a structural body component using the new material model are shown. First step is the material characterization of the magnesium extruded materials. On this base the constitutive model will be developed and validated. In the last step simulations will be performed with the new simulation tool and the results will be compared to test results. The developed material model can be used to simulate extruded materials with asymmetric tension/compression behavior and is not only limited to magnesium extrusions. The model was implemented (as a user defined material model) into commercial crash codes used within the Ford Motor Company. This tool offers the chance to design structural crash relevant vehicle components according to the specific behavior of magnesium. This is one of the main steps for designing stable and cost efficient magnesium parts. The new tool helps to shorten development cycles for magnesium extruded parts, fewer prototypes are necessary to avoid 'surprises' during the development phase.
Improved plasticity and failure models for extruded Mg-profiles in crash simulations
Ein verbessertes Plastizitäts- und Versagensmodell für die Crashberechnung von stranggepreßtem Magnesium
2004
24 Seiten, 23 Bilder, 16 Quellen
Conference paper
English
Improved Plasticity and Failure models for Extruded Mg-Profiles in Crash Simulations
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