Aeroelastic behavior of a typical section with shape memory alloy springs: Modeling nonhomogeneous distribution of state variables

Author(s)

de Sousa, Vagner Candido ^{[1, 2]} ; De Marqui Junior, Carlos ^[1] ; Elahinia, Mohammad ^[2]

Affiliation

^[1] Univ Sao Paulo, Sao Carlos Sch Engn, Dept Aeronaut Engn, BR-13566590 Sao Carlos, SP - Brazil

^[2] Univ Toledo, Dept Mech Ind & Mfg Engn, Dynam & Smart Syst Lab, Toledo, OH 43606 - USA

• Document type: Journal article
• Source: Applied Mathematical Modelling; v. 52, p. 404-416, DEC 2017.
• Web of Science Citations: 4

Abstract

In this paper, a two-degree-of-freedom (namely, plunge and pitch) aeroelastic typical section with shape memory alloy helical springs in the pitch degree-of-freedom is modeled. A linear aerodynamic model is employed to predict the unsteady loads. The shape memory springs model is based on classical models modified by the von Mises pure shear assumption. Nonhomogeneous distributions of shear strain, shear stress and martensitic fraction in the wire cross-section are represented by axi-symmetric annular regions. The numerical predictions of the effects of pseudoelastic hysteresis of shape memory alloy springs on the aeroelastic behavior of the typical section when both the homogeneous and non homogeneous cross-sectional distributions are considered in the simulations are compared with experimental data obtained in wind tunnel tests. The nonhomogeneous assumption results in good agreement between numerical predictions and experiments. Both the numerical and experimental results show that the pseudoelastic hysteresis of SMAs can be employed as a passive alternative to modify the behavior of aeroelastic systems. (C) 2017 Elsevier Inc. All rights reserved. (AU)

• FAPESP's process: 15/26045-6 - Effects of shape memory alloy elements on the behavior of aeroelastic systems and adaptive metamaterials
• Grantee: Vagner Candido de Sousa
• Support Opportunities: Scholarships in Brazil - Post-Doctoral