1. Professor of Aerospace Structures and Computational Aeroelasticity, Dept. of Aeronautics and Space Engineering, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy (corresponding author).
2. Research Assistant, Dept. of Aeronautics and Space Engineering, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy.