T. Klimmek, R. Bogenfeld, E. Breitbarth, J. Dillinger, V. Handojo, T. Kier, D. Kohlgrüber, M. Pusch, C. Raab, J. Wild

The estimation of the loads is a key aspect of the extensive aircraft design process and also an important task during the life-time of an aircraft. DLRs joint efforts regarding the loads estimation and application, the latter also in view of structural aspects, both simulation based and experimentally were part of the DLR project KonTeKst (2016-2019). The loads activities cover the loads process, with one focus on the component loads process. Therein, the various possibilities to introduce loads to the structure were investigated as well as the consideration of flight control methods. On the structural side experiments were executed to estimate damage tolerance parameters for composite structures. Furthermore, fatigue and damage tolerance properties of metallic fuselage structures were estimated. Therefore, a novel AlCuLi sheet material was investigated regarding anisotropic fatigue crack growth. Finally, the consideration of aerodynamic loads for high lift configurations was investigated. The experimental investigations comprise flight tests to measure loads as well as a special wind tunnel test to investigate loads control. For the DLR research glider Discus-2c, the wing loads measured with calibrated electrical strain gauge were compared to the loads determined from the pressure sensors (MEMS), distributed around a wing section. For the DLR HALO, a Gulfstream G550, the loads at special measurement devices attached to the wing used for atmospheric investigation, were measured. Eventually, the structural design of a wind tunnel model with movable control surfaces was done as well as the execution of wind tunnel tests in the DLRs Crosswind Test Facility (SWG), the latter by applying active loads control even in failure cases.

Deutscher Luft- und Raumfahrtkongress 2020

Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn, 2020

Conference Paper

englisch

21,0 x 29,7 cm, 12 Seiten

urn:nbn:de:101:1-2020100213591599709533

10.25967/530200

aircraft loads, loads process, component loads, loads control, fatigue, damage tolerance, material properties, composite material, loads flight testing, structural design, wind tunnel testing

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Klimmek, T.; Bogenfeld, R.; et al. (2020): Aircraft Loads - A Wide Range of Disciplinary and Process-Related Issues in Simulation and Experiment. Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V.. (Text). https://doi.org/10.25967/530200. urn:nbn:de:101:1-2020100213591599709533.

02.10.2020