Vortrag

Numerical study of special issues in the Split-Hopkinson-Bar experiment

  • Digitaler Vortrag: Video

Vortragender

Clara Mangalath, HSU Hamburg

Wissenschaftliche Mitarbeiterin

Professur für Statik und Dynamik

Helmut-Schmidt-Universität Hamburg

Über den Autor

  • 2012-2016- Bachelor-Studium des Bauingenieurwesens an der Kerala Universität, Indien
  • 2016-2019- Master-Studium in Advanced Computational and Civil Engineering Structural Studies an der Technische Universität Dresden
  • Master arbeit- “Numerische Untersuchungen spezieller Fragen im Split-Hopkinson-Bar Versuch”
  • Nov 2018-Jan 2020- Wissenschaftliche Hilfskraft am Institut für Massivbau an der Technische Universität Dresden
  • seit Feb 2020- Wissenschaftliche Mitarbeiterin am Institut für Statik und Dynamik an der Helmut-Schmidt-Universität Hamburg

Zusammenfassung

Split-Hopkinson Pressure Bar experiment is one of the most commonly used tests to characterize the mechanical response of specimens under high strain rates. The theoretical basis of this experiment is based on one-dimensional wave theory. Dealing with this theory in experimental or numerical way, one might observe several mistakes or variation which are often summarized as dispersion. To analyze such phenomena(on), numerical study on the interaction of striker and incident bar was done which revealed much more details which were not accounted before. This numerical investigation helped in understanding the influences of different parameters on the incident wave produced due to striker impact. Negligance of Poisson's ratio resulted in incorrect calculation of strain values and in turn affected the kinetic energy as well. Influence of different material properties, and impedance differ®ence caused by it were also seen. Most of these results call for further detailed investigations. Also results of numerical investigation of interaction between incident bar and specimen and the interaction between specimen and the transmission bar is required for proper understanding and affirmation of various effects caused.

Diskussion

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