This study is concerned with the activation energy threshold of bistable composite plates in order to tailor a bistable
system for specific aeronautical applications. The aim is to explore potential configurations of the bistable plates and
their dynamic behavior for designing novel morphing structure suitable for aerodynamic surfaces and, as a possible
further application, for power harvesters. Bistable laminates have two stable mechanical shapes that can withstand
aerodynamic loads without additional constraint forces or locking mechanisms. This kind of structures, when properly
loaded, snap-through from one stable configuration to another, causing large strains that can also be used for power
harvesting scopes. The transition between the stable states of the composite laminate can be triggered, in principle,
simply by aerodynamic loads (pilot, disturbance or passive inputs) without the need of servo-activated control systems.
Both numerical simulations based on Finite Element models and experimental testing based on different activating
forcing spectra are used to validate this concept. The results show that dynamic activation of bistable plates depend on
different parameters that need to be carefully managed for their use as aircraft passive wing flaps.
F. Nicassio, G. Scarselli, G. Avanzini, and G. Del Core, "Numerical and experimental study of bistable plates for morphing structures," Proc. SPIE 10164, Active and Passive Smart Structures and Integrated Systems 2017, 101640K (Presented at SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring: March 27, 2017; Published: 11 April 2017); https://doi.org/10.1117/12.2260099.
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Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon