Journal Published Online: 02 September 2016
Volume 45, Issue 4

Novel Approach for Endurance Testing of Riblet-Structured Thin Sheets Under Realistic Loading Conditions in Active Drag-Reduction Systems

CODEN: JTEVAB

Abstract

A novel fatigue testing device for bending loading was developed that resembles loading conditions in aerodynamic drag-reduction systems, creating transversal surface waves to modify the surfaces' turbulent boundary layer. The setup uses Lorentz force actuators and is employed in fully reversed loading (R = −1) at a testing frequency of around 100 Hz. Tests were run on riblet-structured Alclad 2024 T351 material. The damage mechanisms for this material are found to be similar for axial and flexural loading. In the high cycle fatigue regime up to a few 106 load cycles, the S/N-curves are also comparable for both loading modes. One distinct difference between the loading modes is a less pronounced threshold behavior in the S/N-curve for bending. Furthermore, a higher stress level has to be applied for fatigue failure in this case.

Author Information

Stille, S.
Inst. of Energy and Climate Research (IEK-2), Forschungszentrum Jülich GmbH, Jülich, DE
Schiek, M.
Central Inst. for Engineering, Electronics and Analytics (ZEA-2), Forschungszentrum Jülich GmbH, Jülich, DE
Silex, W.
Central Inst. for Engineering, Electronics and Analytics (ZEA-2), Forschungszentrum Jülich GmbH, Jülich, DE
Beck, T.
Inst. of Materials Science and Engineering (WKK), TU Kaiserslautern, D-67653 Kaiserslautern, DE
van Waasen, S.
Central Inst. for Engineering, Electronics and Analytics (ZEA-2), Forschungszentrum Jülich GmbH, Jülich, DE
Singheiser, L.
Inst. of Energy and Climate Research (IEK-2), Forschungszentrum Jülich GmbH, Jülich, DE
Pages: 7
Price: $25.00
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Stock #: JTE20150369
ISSN: 0090-3973
DOI: 10.1520/JTE20150369