1. Researcher, Dept. of Mechanics and Materials, Faculty of Engineering, Univ. of Reggio Calabria, Via Graziella, Feo di Vito, 89122 Reggio Calabria, Italy (corresponding author).
2. Ph.D. Student, Dept. of Mechanics and Materials, Faculty of Engineering, Univ. of Reggio Calabria, Via Graziella, Feo di Vito, 89122 Reggio Calabria, Italy.
3. Engineer, Tecno-Sud s.r.l., Via Trapezzoli 47, 89134 Reggio Calabria, Italy.