1. Department of Basic and Applied Sciences for Engineering Sapienza University of Rome Via Antonio Scarpa, 16 Rome 00161 Italy
2. Institute of Mechanics Technische Universität Berlin Einsteinufer 5 Berlin 10967 Germany
3. Division of Applied Mechanics Uppsala University Department of Materials Science and Engineering Box 534 Uppsala 751 21 Sweden
4. International Research Center on Mathematics and Mechanics of Complex Systems Università degli Studi dell'Aquila Via Giovanni Gronchi 18 ‐ Zona industriale di Pile L'Aquila 67100 Italy
5. Department of Mechanical and Aerospace Engineering Sapienza University of Rome Via Eudossiana 18 Rome 00184 Italy