PSI - Issue 39

Deborah Weiß et al. / Procedia Structural Integrity 39 (2022) 139–147 Author name / Structural Integrity Procedia 00 (2019) 000–000

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4. Summary In this paper the influence of plane mixed-mode loading on the kinking angle of clinchable sheet metals in order to prove the applicability of the MTS-criterion for thin structures was investigated. It can be stated that the experimental investigations have shown that the MTS-criterion for determining the kinking angle is also valid for thin metal sheets with a thickness of only 1.5 mm like they are used within the clinching process. Bulging was not observed during the experimental investigations. Furthermore, the σ 1 ’-criterion, which is the three-dimensional extension of the MTS-criterion and is implemented in A DAPCRACK 3D to determine the kinking angle, does not require any adjustment. Acknowledgements This project was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – TRR 285 – Project-ID 418701707. References Dietrich J., 2018. Praxis der Umformtechnik. Umform- und Zerteilverfahren, Werkzeuge, Maschinen. Springer Vieweg Verlag, Wiesbaden. EC-European Commission, 2019: Regulation (EU) 2019/631 of the European parliament and of the council of 17 April 2019 setting CO2 emission performance standards for new passenger cars and for new light commercial vehicles, and repealing Regulations (EC) No 443/2009 and (EU) No 510/2011 (recast). Official Journal of the European Union L111, 13-53. Erdogan F., Sih G.C., 1963. On the crack extension in plates under plane loading and transverse shear. J. Basic Engng. 85, 519-525. Eshtayeh M. M., Hrairi M., Mohiuddin A. K. M, 2016. Clinching process for joining dissimilar materials: state of the art. International Journal of Advanced Manufacturing Technology 82, 179-195. Friedrich H.E. (Ed.), 2017. Leichtbau in der Fahrzeugtechnik. 2nd edition, Springer-Vieweg, Wiesbaden. Geoffrey D., 2012. Materials for Automobile Bodies. 2nd edition, Butterworth-Heinemann Ltd, Oxford. Gross D., Seelig T., 2018. Linear fracture mechanics. In: Fracture Mechanics. Mechanical Engineering Series. Springer, Cham. Liebig H.P., 1992. Durchsetzfügen setzt sich durch. Stahl Heft 3, 100 – 104. Nuismer, R.J., 1975. An energy release rate criterion for mixed mode fracture. Int. J. Frac 11, 245-250. Richard H.A., 1984. Some theoretical and experimental aspects of mixed mode fractures. In: Advances in Fracture Research, Valluri, S.R. et al. (Eds.), Pergamon Press, Oxford, 3337-3344. Richard H.A., 1985. Bruchvorhersage bei überlagerter Normal- und Schubbeanspruchung von Rissen. VDI-Verlag, Düsseldorf. Richard H.A., 1987. Crack problems under complex loading. Role of Fracture Mechanics in Modern Technology. In: Structural failure, product liability and technical insurance, Rossmanith (Ed.), Inderscience Enterprises Ltd., Geneve. Richard H.A., 1989. Specimens for investigating biaxial fracture and fatigue processes. In: Biaxial and Multiaxial Fatigue, Brown, M.W., Miller, K.J (Eds.), Mechanical Engineering Publications, London, 217-229. Richard H.A., Benitz, K., 1983. A loading device for the creation of mixed mode in fracture mechanics. Int. J. Frac. 22, R55/R58. Richard H.A., Fulland M., Sander M., 2005. Theoretical crack path prediction. Fatigue & Fracture of Engineering Materials & Structures 28, 3-12. Richard H.A., Sander M., 2016. Fatigue Crack Growth, Springer Verlag, Switzerland. Schöllmann M., 2001. Vorhersage des Risswachstums in ebenen und räumlichen Strukturen mittels numerischer Simulation. Fortschritt-Berichte, VDI-Reihe 18, Nr. 269, Düsseldorf. Sih G.C., 1974. Strain-energy-density factor applied to mixed mode crack problems. Int. J. Frac 10, 305-321. Weiß D., Schramm B., Kullmer G., 2020. Development of a special specimen geometry for the experimental determination of fracture mechanical parameters of clinchable metal sheets . Procedia Structural Integrity 28, 2335-2341. Weiß D., Schramm B., Kullmer G., 2021. Numerical and experimental fracture mechanical investigations of clinchable sheet metals made of HCT590X. Key Engineering Materials 883, 127-132. Amestoy M., Bui H.D., Dang Van K., 1980. Analytical asymptotic solution of the kinked crack problem. In: Advances in Fracture research, Francois, D. et al. (Eds.), Oxford, 107-113.