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Influence of anisotropic damage evolution on cold forging

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Abstract

This contribution deals with the influence of anisotropic material degradation (damage) within numerical simulations of cold forging. For that purpose, two constitutive frameworks for modeling ductile damage are presented: an isotropic and an anisotropic model. In a first step, both models are calibrated based on a uniaxial tensile test. Then, the forward rod extrusion process is simulated with the isotropic model. The deformation of a characteristic element is transferred to the anisotropic model and the local response is investigated. Both models are compared to one another in terms of the process induced ductile damage. It will be shown, that the magnitude of the induced damage agrees reasonably well, but that the orientation of ductile damage is of major importance.

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Acknowledgements

Financial support from the German Research Foundation (DFG) via SFB/TR TRR 188 (278868966), projects A02, C01 and S01, is gratefully acknowledged.

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Authors and Affiliations

  1. Institute of Mechanics, TU Dortmund University, Leonhard-Euler-Str. 5, 44227, Dortmund, Germany

    Kai Langenfeld, Robin Schulte, Richard Ostwald & Jörn Mosler

  2. Institute of Forming Technology and Lightweight Components, TU Dortmund University, Baroper Str. 303, 44227, Dortmund, Germany

    Alexander Schowtjak, Oliver Hering, Till Clausmeyer & A. Erman Tekkaya

  3. Department of Materials Test Engineering, TU Dortmund University, Baroper Str. 303, 44227, Dortmund, Germany

    Kerstin Möhring & Frank Walther

  4. Bremen Institute of Mechanical Engineering (BIME), University of Bremen, Am Biologischen Garten 2/IW3/FG15, 28359, Bremen, Germany

    Richard Ostwald

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  1. Kai Langenfeld
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  2. Alexander Schowtjak
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  3. Robin Schulte
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Correspondence to Kai Langenfeld.

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Langenfeld, K., Schowtjak, A., Schulte, R. et al. Influence of anisotropic damage evolution on cold forging. Prod. Eng. Res. Devel. 14, 115–121 (2020). https://doi.org/10.1007/s11740-019-00942-y

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