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

Autor(es)

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

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: Applied Mathematical Modelling; v. 52, p. 404-416, DEC 2017.
• Citações Web of Science: 4

Resumo

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)

• Processo FAPESP: 15/26045-6 - Efeitos de elementos com memória de forma sobre o comportamento de sistemas aeroelásticos e metamateriais adaptativos.
• Beneficiário: Vagner Candido de Sousa
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado