Passive control of the flutter instability on a two-degrees-of-freedom system with pseudoelastic shape-memory alloy springs.

Abstract : A passive control of aeroelastic instabilities on a two-degrees-of-freedom (dofs) system is considered here using shape memory alloys (SMA) springs in their pseudo-elastic regime. SMA present a solid-solid phase change that allow them to face strong deformations (∼ 10%); in the pseudo-elastic regime, an hysteresis loop appears in the stress-strain relationship which in turn gives rise to an important amount of dissipated energy. This property makes the SMA a natural candidate for damping undesired vibrations in a passive manner. A 2-dofs system is here used to model the classical flutter instability of a wing section in an uniform flow. The SMA spring is selected on the pitch mode in order to dissipate energy of the predominant motion. A simple model for the SMA hysteresis loop is introduced, allowing for a quantitative study of the important parameters to optimize in view of an experimental design.
Complete list of metadatas

Cited literature [8 references]  Display  Hide  Download

https://hal-ensta-paris.archives-ouvertes.fr//hal-01134710
Contributor : Cyril Touzé <>
Submitted on : Tuesday, March 24, 2015 - 10:55:24 AM
Last modification on : Wednesday, July 3, 2019 - 10:48:04 AM

File

AMalher_ODoare_CTouze.pdf
Files produced by the author(s)

Identifiers

Collections

Citation

Arnaud Malher, Olivier Doaré, Cyril Touzé. Passive control of the flutter instability on a two-degrees-of-freedom system with pseudoelastic shape-memory alloy springs.. Int. Conference on Structural nonlinear dynamics and diagnosis, CSNDD 2014, May 2014, Agadir, Morocco. ⟨10.1051/matecconf/20141601006⟩. ⟨hal-01134710⟩

Share

Metrics

Record views

256

Files downloads

293