Improving mechanical ice protection systems with substrate shape optimization
Résumé
Mechanical and electro-mechanical de-icing systems are low-energy ice protection solutions based on fracture
mechanisms. It can, however, be difficult to obtain the protection of an entire surface due to the limited prop
agation of fractures for some mechanisms. This article shows how it is possible to reshape the substrate in order
to favor the propagation of adhesive fracture at the ice/substrate interface. The first part of the paper introduces
an analytical beam theory approach for running computations quickly, making it possible to achieve parametric
optimization of the substrate thickness and maximize the propagation length. The optimization results were
validated using FEM software and tests on an aluminum prototype. A second method is also studied in this paper,
topology optimization is used on a 2D finite element model to minimize the substrate mass of the proposed
solution and adhesive crack propagation is assessed in comparison with the mass impact. For different boundary
conditions, propagation ranges can be increased by up to 150% with a mass increase limited to 50%. Using
topology optimization, the additional mass could be reduced by 60% while maintaining the same
performances.
Domaines
AutreOrigine | Fichiers produits par l'(les) auteur(s) |
---|