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      Impact of notch geometry on dynamic strength of materials

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          Abstract

          The resilience of materials from the notch effect together with subsequent operating life and safety are important factors for the choice of material in industrial manufacture as well as for crash scenarios. The aim of this investigation is to study stress caused by the notch effect for HCT780XD and X5CrNi18-10 at different tensile test strain rates as well as due to various stress concentration factors during a high-speed tensile test. The notch geometries chosen are round, trapezoid, sharp and bore. They are compared to a test specimen without notch. The stress distribution analysis of notches was performed by the finite-element-method (FEM) in order to determine stress concentration factors. The high-speed tensile test was recorded with a high-speed camera. For this purpose, the test specimens were marked with a speckle-pattern, essential for the identification of strain rate via Dantec Dynamics Istra 4D. The influence of the stress concentration rate on parameters like energy, strength and the elongation of break was established and will be reported in the following. The level of the concentration factor leads to negative effects while the strain rate level delivers positive results. On other hand, the stress concentration factor is more important on the parameter than the strain rate. By contrast, Poisson's ratio does not affect the parameters observed.

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          Ermüdungsfestigkeit

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            Kerbspannungslehre

            H Neuber (2001)
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              HCT780XD (HC450XD∗) Mehrphasenstähle zum Kaltumformen – Dualphasenstähle

              (2009)
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                Author and article information

                Journal
                mp
                Materials Testing
                Carl Hanser Verlag
                0025-5300
                2195-8572
                30 August 2019
                : 61
                : 9
                : 851-856
                Affiliations
                1 Clausthal, Germany
                Author notes
                [] Correspondence Address, Kai Treutler, Institut für Schweißtechnik und, Trennende Fertigungsverfahren (ISAF), Technische Universität Clausthal – Bereichsleitung Fügetechnik – Agricolastraße 2, D-38678 Clausthal-Zellerfeld, Germany, E-mail: treutler@ 123456isaf.tu-clausthal.de

                Jekaterina Stael von Holstein, born in 1992, her Master's Degree in power systems engineering from Clausthal University of Technology, Germany, in 2019. She has worked as Scientific Assistant at the Institute of Welding and Machining, Clausthal, since 2018.

                Tobias Bick, M.Sc., born in 1991, studied Industrial and Mechanical Engineering at the Clausthal University of Technology, Germany, from 2011 to 2018. Since 2018, he has been working as Research Assistant at the Institute of Welding and Machining in the group “Joint Welding”, Clausthal University of Technology, Germany.

                Dr.-Ing. Kai Treutler, studied Mechanical Engineering at the Clausthal University of Technology, Germany, as of 2008. Since 2018 he has been a Senior Scientist at the Institute of Welding and Machining and heads the group “Joint Welding”.

                Prof. Dr.-Ing. Volker Wesling studied Mechanical Engineering at the Clausthal University of Technology, Germany, from 1984 to 1989. He completed his Doctor's degree in 1993. He worked for the Burgsmüller Gmbh and the Berstorff GmbH from 1994 to 2002 and then became Head of the institute of Welding and Machining at the Clausthal University of Technology, Germany. His research fields are the production of coatings for wear and corrosion protection, low-heat joining and welding processes, abrasive manufacturing processes and material-oriented manufacturing technology.

                Article
                MP111393
                10.3139/120.111393
                e447c064-767f-4456-8121-8e22a95c0293
                © 2019, Carl Hanser Verlag, München
                History
                Page count
                References: 15, Pages: 6
                Categories
                Fachbeiträge/Technical Contributions

                Materials technology,Materials characterization,Materials science
                Materials technology, Materials characterization, Materials science

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