Abstract
Morphing concepts were investigated for a wingtip with active trailing edge (WATE) in an adaptive wing. The basic functionality is to take up geometric gap changes in order to maintain a smooth transition between connected parts. A specific material was tailored in order to meet a set of initially formulated requirements, which involve low modulus, high fatigue life, and stability against physical aging in a temperature range from −55 to +80 °C. A variety of material samples and joints were prepared and tested in order to provide a database for numerical simulation and sizing. One of the proposed solutions was developed until the physical sub-component level. Finally, morphing parts were prepared and delivered for assembly in ground test and true-scale wind tunnel demonstrators.
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Abbreviations
- d :
-
Bond line thickness
- G :
-
Initial shear modulus
- i :
-
Index
- k :
-
Exponent parameter in strain-life law
- n :
-
Sample size
- N :
-
Number of cycles
- N f :
-
Number of cycles to failure or fatigue life
- P :
-
Probability
- R :
-
Load ratio or stress ratio
- S :
-
Standard deviation
- u :
-
Displacement in mechanical test
- γ :
-
Amount of shear
- ε :
-
Nominal strain
- ε 0 :
-
Prefactor in strain-life law
- ε 1 :
-
Maximum principal strain (given as nominal strain if not stated otherwise)
- α :
-
Material parameter in hyperelastic Ogden potential function
- λ :
-
Stretch ratio
- μ :
-
Material parameter in hyperelastic Ogden potential function
- ν :
-
Poisson’s ratio
- θ :
-
Rotational angle
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Acknowledgments
The research leading to these results has received funding from the European Union’s Seventh Framework Programme for research, technological development, and demonstration under grant agreement no 284562.
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© 2016 Springer International Publishing Switzerland
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Nagel, C., Fiedler, A., Schorsch, O., Lühring, A. (2016). Seamless Morphing Concepts for Smart Aircraft Wing Tip. In: Wölcken, P., Papadopoulos, M. (eds) Smart Intelligent Aircraft Structures (SARISTU). Springer, Cham. https://doi.org/10.1007/978-3-319-22413-8_14
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DOI: https://doi.org/10.1007/978-3-319-22413-8_14
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