Heinrich Traphöner M. Sc.
Chief Engineer technology and finance

Baroper Str. 303
MB III / Raum 4.028
Campus Süd
44227 Dortmund
Germany

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+49 231 755 8439

Key activities

Human resources and budget planning

Material characterization
In-plane torsion test
Springback prediction

Projects

Novel In-Plane Torsion Specimen for the Characterization of Damage and Hardening

Analysis of Material-Specific and Geometric Influences on the Numerical Springback Prediction (completed)

 

Publications

2020
Jäckel, M., Coppieters, S., Vandermeiren, N., Kraus, C., Drossel, W. G., Miyake, N., Kuwabara, T., Unruh, K., Balan, T., Traphöner, H., Tekkaya, A. E., 2020. Process-oriented flow curve determination at mechanical joining. Proceedings of the ESAFORM 2020, Cottbus, Germany.
2019
Traphöner, H., Clausmeyer, T., Tekkaya, A. E., 2019. Methods for measuring large shear strains in in-plane torsion tests. Journal of Materials Processing Technology. https://doi.org/10.1016/j.jmatprotec.2019.116516
Coppieters, S., Jäckel, M., Miyaka, N., Kraus, C., Traphöner, H., Kuwabara, T., Tekkaya, A. E., 2019. Large strain flow curve identification for steel metal: Process-informed method selection. Proceedings of the Forming Technology Form 2019, Munich, Germany.
Tekkaya, A. E., Traphöner, H., Hering, O., Kolpak, F., Gutknecht, F., Schowtjak, A., 2019. Über die klassische Werkstoffprüfung hinaus - Werkstoffeigenschaften für die moderne Umformtechnik. diALOG Mitgliedermagazin der DGM.
Hou, Y., Min, J., Guo, N., Lin, J., Carsley, J.E., Stoughton, T. Traphöner, H., Clausmeyer, T., Tekkaya, A. E., 2019. Investigation of evolving yield surfaces of dual-phase steels. Journal of Materials Processing Technology.
Guo, N., Min, J., Hou, Y., Lin, J., Carsley, J.E., Stoughton, T. Traphöner, H., Clausmeyer, T., Tekkaya, A. E., 2019. An experimental study on yield surface evolution of a TRIP-assisted steel. Proceedings of the NUMIFORM 2019, New Hampshire, USA.

Dardaei Joghan, H., Hahn, M., Traphöner, H., Tekkaya, A. E., 2019. Influence of the preheating strategy on the deep drawing of extruded magnesium alloy ME20 sheets. In: Proceedings of The 38th International Deep Drawing Research Group Annual Conference, Enschede, The Netherlands https://doi.org/10.1088/1757-899X/651/1/012067

Tekkaya, A. E., Traphöner, H., Merklein, M., Rosenschon, M., 2019. Analyse prozessnaher Einflüsse auf das Rückfederungsverhalten von Blechwerkstoffen. EFB-Forschungsbericht Nr. 509, EFB, Hannover.

Traphöner, H., Tekkaya, A. E., Merklein, M., Rosenschon, M., 2019. Characterisierung und Modellierung des zyklischen Verfestigungsverhaltens zur Verbesserung der numerischen Vorhersage von Blechformprozessen. Tagungsband des EFB-Kolloquiums Blechverarbeitung 2019 am 2. und 3. April in Bad Boll, 271-278.

2018
Gutknecht, F., Gerstein, G., Traphöner, H., Clausmeyer, T., Nürnberger, F., 2018. Experimental Setup to Characterize Flow-Induced Anisotropy of Sheet Metals. In: Proceedings of the 37th International Deep-Drawing Research Group Conference, Waterloo, Canada, DOI: 10.1088/1757-899X/418/1/012085.
Traphöner, H., Clausmeyer, T., Tekkaya, A. E., 2018. Material Characterization for Plane and Curved Sheets Using the In-Plane Torsion Test – An Overview. Journal of Materials Processing Technology 257, pp. 278-287.
Traphöner, H., Heibel, S., Clausmeyer, T., Tekkaya, A. E., 2018.Influence of Manufacturing Processes on Material Characterization with the Grooved In-Plane Torsion Test. International Journal of Mechanical Sciences 146, pp. 544-555.
2017
Traphöner, H., Clausmeyer, T., Tekkaya, A. E., 2017. Material characterization for plane and curved sheets using the in-plane torsion test – an overview. In: Procedia Engineering 207: 12 th International Conference on Technology of Plasticity, Cambridge, United Kingdom, pp.1934-1939.
Tekkaya, A. E., Traphöner, H., Clausmeyer, T., 2017. Sheet Metal Characterization with the In-plane Torsion Test. CEMEF, 03.05.2017, Sophia Antipolis, France.
Tekkaya, A. E., Traphöner, H., Clausmeyer, T., 2017. In-plane Torsion Testing of Sheet Metal. IDDRG, 02.-06.07.2017, Munich, Germany.
Tekkaya, A. E., Traphöner, H., Merklein, M., Rosenschon, M., 2017. Identifikation spannungsabhängiger Bauschinger-Koeffizi- enten. EFB Kolloquium, 28.03.2017, Fellbach, Germany.
Hijazi, D., Traphöner, H., Staupendahl, D., Clausmeyer, T., Tekkaya, A. E., 2017. Characterization of planar anisotropy, hardening and fracture of tubular materials by a modified in-plane torsion test. SCT 2017, 18.-22.06.2017, Amsterdam, Niederlande.
2016
Ortelt, T.R., Gies, S., Traphöner, H., Chatti, S., Tekkaya, A. E., 2016. Integration of new concepts and features into forming technoloy lectures, 2016 IEEE Global Engineering Education Conference (EDUCON), pp. 555-562.
Tekkaya, A. E., Traphöner, H., Merklein, M., Rosenschon, M., 2016. Identifikation spannungsabhängiger Bauschinger-Koeffizienten. EFB-Forschungsbericht Nr. 432, EFB, Hannover.
Ul Hassan, H., Traphöner, H., Güner, A., Tekkaya, A. E., 2016. Accurate springback prediction in deep drawing using pre-strain based multiple cyclic stress–strain curves in finite element simulation. International Journal of Mechanical Sciences 110, pp. 229-241.
2015
Traphöner, H., Yin, Q., Tekkaya, A. E., 2015. Sheet Material Characterization with the In-Plane Torsion Test: Cyclic Loading, Grooved Specimen and Twin Bridge Specimen, In: Tekkaya, Homberg, W., Brosius, A. (Eds.), 60 Excellent Inventions in Metal Forming. Springer Berlin Heidelberg, Berlin, Heidelberg, 17-21.
Yin, Q., Tekkaya, A. E., Traphöner, H., 2015. Determining cyclic flow curves using the in-plane torsion test. CIRP Annals - Manufacturing Technology 64, pp. 261-264.