1. Department of Mechanical Engineering, TOBB University of Economics and Technology, Söğütözü, Ankara 06560, Turkey
2. School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
3. Institute of Mechanics, Materials and Civil Engineering, Université catholique de Louvain, Place Sainte Barbe, 2, B-1348 Louvain-la-Neuve, Belgium