flutter instability

A connection between dry friction and flutter instability in a simple mechanical system has been discovered.

"Surface boundary conditions trigger flutter instability in non-associative elastic-plastic solids" (with B. Loret, F.M.F. Simões), Int.

"Flutter Instability in a Non-associative Elastic-plastic Layer: analytical versus finite element results" (with F.M.F. Simões), Int.

Flutter instability corresponds to a vibrational motion of increasing amplitude and is shown in Fig.6 (upper part) together with the divergence instability (lower part) consisting in an exponential growth.

Emphasis is placed on divergence and flutter instability of follower force systems, the derivation of lower bounds for the critical load for divergence, and estimates for critical loads for flutter.

Following the same trend, other studies have already been carried out, for example the flutter power generation system proposed by Isogai et al. in 2003, which uses the flutter instability caused by the wind on an aerofoil to extract energy from the flow.