Finite Element Simulation of the Stretch-Forming of Aircraft Skins


Wisselink, H.H. and Boogaard, A.H. van den (2005) Finite Element Simulation of the Stretch-Forming of Aircraft Skins. In: NUMISHEET 2005, 6th international conference and workshop on numerical simulation of 3D sheet metal forming processes, August 15-19, 2005, Detroit, Michigan, USA.

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Abstract:In the aerospace industry stretch forming is often used to produce skin parts. During stretch forming a sheet is
clamped at two sides and stretched over a die, such that the sheet gets the shape of the die. However for complex shapes it is
necessary to use expensive intermediate heat-treatments in order to avoid Liiders lines and still achieve large deformations.
To optimize this process FEM simulations of this process are performed. A leading edge skin part, made of aluminium
AA2024, has been chosen for a preliminary study. The material is modelled with the Vegter yield function, to account for the
anisotropic behaviour of the aluminium sheet. Each annealing step is considered to reduce the work hardening completely.
The strains in the part have been measured and are used for validation of the simulations. The used FEM model and the
experimental results will be presented and conclusions and recommendations for future research will be given.
Item Type:Conference or Workshop Item
Copyright:American Institute of Physics
Engineering Technology (CTW)
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