Friedlein J, Mergheim J, Steinmann P (2021)
Publication Type: Conference contribution
Publication year: 2021
Publisher: Trans Tech Publications Ltd
Book Volume: 883 KEM
Pages Range: 57-64
Conference Proceedings Title: Key Engineering Materials
Event location: Virtual, Online
ISBN: 9783035716931
DOI: 10.4028/www.scientific.net/KEM.883.57
In recent years, clinching has gathered popularity to join sheets of different materials in industrial applications. The manufacturing process has some advantages, as reduced joining time, reduced costs, and the joints show good fatigue properties. To ensure the joint strength, reliable simulations of the material behaviour accounting for process-induced damage are expected to be beneficial to obtain credible values for the ultimate joint strength and its fatigue limit. A finite plasticity gradient-damage material model is outlined to describe the plastic and damage evolutions during the forming of sheet metals, later applied to clinching. The utilised gradient-enhancement cures the damage-induced localisation by introducing a global damage variable as an additional finite element field. Both, plasticity and damage are strongly coupled, but can, due to a dual-surface approach, evolve independently. The ability of the material model to predict damage in strongly deformed sheets, its flexibility and its regularization properties are illustrated by numerical examples.
APA:
Friedlein, J., Mergheim, J., & Steinmann, P. (2021). A finite plasticity gradient-damage model for sheet metals during forming and clinching. In Key Engineering Materials (pp. 57-64). Virtual, Online: Trans Tech Publications Ltd.
MLA:
Friedlein, Johannes, Julia Mergheim, and Paul Steinmann. "A finite plasticity gradient-damage model for sheet metals during forming and clinching." Proceedings of the 19th International Conference on Sheet Metal, SheMet 2021, Virtual, Online Trans Tech Publications Ltd, 2021. 57-64.
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