Lenzen M, Kraus M, Merklein M (2022)
Publication Type: Conference contribution
Publication year: 2022
Publisher: Trans Tech Publications Ltd
Book Volume: 926 KEM
Pages Range: 1923-1930
Conference Proceedings Title: Key Engineering Materials
Event location: Braga, PRT
ISBN: 9783035717594
DOI: 10.4028/p-vqmjf9
Many sheet materials do not exhibit constant properties over the sheet thickness. On the one hand, this can be caused by a rolling process with a pass reduction of 1-2%, the so-called skin pass rolling. This is mainly used for deep drawing steel grades to eliminate the pronounced yield strength of the base material. Another possibility is abrasive blasting or shot peening of sheet metal. This causes plastic deformation of the sheet surface and material strengthening. The grading can be used to locally strengthen components or locally adapt the roughness. Since many production processes today are designed numerically, the mapping of such a grading is necessary but currently not implemented in FE code. The aim of this research is, to correlate the material hardness to a plastic pre-strain with a newly developed characterization method. For this purpose, graded material properties are generated by means of abrasive blasting as an example process. The resulting locally varying work hardening over the sheet thickness is further integrated in finite element analysis by the assignment of a starting condition of a 2d-shell element formulation. With this approach, it is possible to map the graded material properties easily in FE simulations with a very good accuracy.
APA:
Lenzen, M., Kraus, M., & Merklein, M. (2022). Characterization and Modelling of Sheet Material with Graded Strength for More Accurate Finite Element Analysis. In Gabriela Vincze, Frédéric Barlat (Eds.), Key Engineering Materials (pp. 1923-1930). Braga, PRT: Trans Tech Publications Ltd.
MLA:
Lenzen, Matthias, Martin Kraus, and Marion Merklein. "Characterization and Modelling of Sheet Material with Graded Strength for More Accurate Finite Element Analysis." Proceedings of the 25th International Conference on Material Forming, ESAFORM 2022, Braga, PRT Ed. Gabriela Vincze, Frédéric Barlat, Trans Tech Publications Ltd, 2022. 1923-1930.
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