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Calibration of High-Frequency Mechanical Impact Simulation Based on Drop Tests [in press]

Gkatzogiannis, Stefanos; Knoedel, Peter; Ummenhofer, Thomas

Abstract:
A series of drop tests was implemented in the present study in order to allow the reproduction of a single impact identical to the high frequency mechanical impact (HFMI) under monitored conditions in the laboratory. Therewith, characterization of the investigated material’s mechanical behavior by explicitly considering possible irregularities concerning the present deformation modes would be enabled. Main goal was the determination of the investigated material’s dynamic yield stress for various strain rates inside the spectrum of interest, so that the Cowper–Symonds viscous material model would be calibrated for the subsequent HFMI simulation. The values of the dynamic yield stress extracted by the present drop tests show good agreement with other experimental methods regarding the investigated material S355. The introduction of the calibrated material behavior on the present drop tests in the finite element (FE) analysis of HFMI led to reduced preciseness though, in comparison with the FE analysis, which considered high strain rate tensile tests found in literature. A series of conclusions was drawn from both the experimental and numerical investigations, confirming most of the initial expectations. ... mehr

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Originalveröffentlichung
DOI: 10.1007/s11665-020-04817-7
Zugehörige Institution(en) am KIT Versuchsanstalt für Stahl, Holz und Steine (VAKA)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 1059-9495, 1544-1024
KITopen-ID: 1000119454
Erschienen in Journal of materials engineering and performance
Vorab online veröffentlicht am 04.05.2020
Nachgewiesen in Scopus
Web of Science
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