1. Department of Engineering; University of Ferrara; via Saragat 1 44122 Ferrara Italy
2. Polytechnic Department of Engineering and Architecture (DPIA); University of Udine; via delle Scienze 208 Udine 33100 Italy
3. Chair of Mechanical Engineering; Montanuniversität Leoben; Franz Josef-Straße 18 Leoben 8700 Austria