1. Mechanical and Construction Engineering Department, Northumbria University, Newcastle upon Tyne NE1 8ST, United Kingdom
2. Institute for Aerospace Technology and The Composites Group, University of Nottingham, Nottingham NG8 1BB, United Kingdom
3. Metamaterials Ltd, 62 Park Lane, Wallington SM6 0TL, United Kingdom
4. Mechanical Engineering Department, University of Louisville, Louisville, Kentucky 40292, USA
5. Department of Mechanical Engineering & Mecha(tro)nic System Dynamics (LMSD), KU Leuven, Gent 9000, Belgium