1. Technische Hochschule Mittelhessen, Department IEM, Wilhelm-Leuschner-Strasse 13, Friedberg 61169, Germany
2. Fraunhofer Institute for Mechanics of Materials IWM, BU Biological and Macromolecular Materials, Walter-Hülse-Strasse 1, Halle 06120, Germany
3. City University London, School of Engineering and Mathematical Sciences, Northampton Square, London EC1V 0HB, United Kingdom