Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Non-isothermal aeroelastic behavior of a typical section with shape memory alloy springs
Submission Author:
Vagner Candido de Sousa , SP
Co-Authors:
Vagner Candido de Sousa, Tarcisio Marinelli Pereira Silva, Carlos De Marqui Junior
Presenter: Tarcisio Marinelli Pereira Silva
doi://10.26678/ABCM.COBEM2017.COB17-0497
Abstract
This paper addresses the modeling and analysis of a two-degree-of-freedom typical aeroelastic section with shape memory alloy (SMA) springs introduced through the pitch degree-of-freedom with a focus on exploiting the energy dissipating and damping capabilities of SMAs exhibiting pseudoelasticity. An augmented-state approximation to Theodorsen aerodynamics is used for the determination of the aerodynamic loads. The phase transformation kinetics related to pseudoelasticity is based on Brinson’s model. A heat transfer model is included to represent thermal effects such as Joule heating, natural convection, and latent heat associated with phase transformation. The effect of latent heat on the SMA temperature, on the critical stresses for phase transformation, and therefore on the overall aeroelastic behavior of the typical section is addressed. The electrical resistance of the SMA springs is expressed as function of the martensitic fraction and hence the corresponding variations in electrical activation are accounted for. The effects of the hysteretic behavior of the SMA springs on the aeroelastic behavior of the typical section are investigated at the flutter boundary and at post-flutter regime.
Keywords
Shape Memory Alloy, Pseudoelastic hysteresis, Aeroelasticity, Flutter, Heat transfer
