Design and Modeling of Mechanical Systems - II Proceedings of the Sixth Conference on Design and Modeling of Mechanical Systems, CMSM'2015, March 23-25, Hammamet, Tunisia - Chouchane, Mnaouar; Fakhfakh, Tahar; Daly, Hachmi Ben; Aifaoui, Nizar; Chaari, Fakher (Springer International Publishing : Imprint: Springer, 2015)