Design and Modeling of Mechanical Systems - IV: Proceedings of the 8th Conference on Design and Modeling of Mechanical Systems, CMSM’2019, March 18–20, Hammamet, Tunisia - Aifaoui; Abbes, Mohamed Slim; Affi, Zouhaier; Benamara, Abdelmajid; Chaari, Fakher; Chouchane, Mnaouar; Haddar, Mohamed; Romdhane, Lotfi; Walha, Lassad (Springer International Publishing, 2020)