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Title:	Ermittlung der Schubeigenschaften von Sandwichkernen - Experiment und Modellierung
Abstract:	Ein Vergleich der Kernmaterialien von Sandwichelementen hat inkonsistente Zusammenhänge zwischen ihren Steifigkeitsmoduln bei unterschiedlichen Kerndicken ergeben. Daher wurden zwei Testverfahren zur Ermittlung der Schubeigenschaften des Kernwerkstoffs von Sandwichelementen theoretisch und experimentell untersucht. Die Ergebnisse zeigen, dass bei dem Schubbalkenversuch nach DIN EN 14509 eine genauere Definition der Lastverteilungsplatten notwendig ist und die übliche Vernachlässigung der Eindrückung am Auflager lediglich bei dünnen und mittleren Bauteildicken gerechtfertigt ist. Die Untersuchungen zum Gelenkquadratversuch haben den Einfluss der Exzentrizität zwischen der Gelenkebene und der Probenaußenkante gezeigt und mündeten in der Entwicklung eines neuen Versuchsaufbaus. Die Erkenntnisse aus den Untersuchungen liefern die Grundlage dafür, das Tragverhalten von Sandwichelementen künftig realistischer modellieren zu können. Determination of the shear properties of sandwich core materials A comparison of the core materials of sandwich panels has revealed inconsistent relationships between their stiffness moduli at different core thicknesses. Therefore, two test methods for determining the shear properties of the core material of sandwich panels were assessed theoretically and experimentally. The results show that for the shear beam test according to EN 14509 a more precise definition of the load distribution plates is necessary and that the usual neglect of the indentation at the support is only justified for thin and medium panel thicknesses. The investigations on the square shear test have shown the influence of the eccentricity between the joint plane and the top edge of the specimen and resulted in the development of a new test setup. The findings from the investigations provide the basis for more realistic modelling of the load-bearing behavior of sandwich panels in the future.
Source:	Stahlbau 91 (2022), No. 11
Page/s:	700-708
Language of Publication:	German

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