Microslip Induced Damping in the Contact of Nominally Flat Surfaces with Geometric Defects

Bouchaala Noussa (1, 2, 3, 4) , Jean-Luc Dion (1, 2) , Nicolas Peyret (1, 2)

1 QUARTZ - Laboratoire QUARTZ
2 SUPMECA - SUPMECA - Institut supérieur de mécanique de Paris
3 LA2MP - Laboratoire de recherche de Mécanique, Modélisation et Production
4 ENIS - École Nationale d'Ingénieurs de Sfax | National School of Engineers of Sfax

It is well known that the friction between interfaces at bolted joints plays a major role in the characterization of damping. Friction can be either induced by macroslip or microslip. The aim of this chapter is to model and quantify the dissipated energy by microslip in the joints in order to compute the damping ratio. It is assumed that the coefficient of friction between the nominally flat surfaces is constant and that friction is the only source of energy dissipation. An experimental study is reported to measure static normal load and dynamic tangential load without any coupling between these two main directions. A rheological contact model, Extended Greenwood Model (EGM), based on microcontacts and statistical distributions is developed and studied. Experimental results and simulations are compared in order to assess and discuss the model.

Domaines: Sciences de l'ingénieur [physics]

Bouchaala Noussa, Jean-Luc Dion, Nicolas Peyret. Microslip Induced Damping in the Contact of Nominally Flat Surfaces with Geometric Defects. The Mechanics of Jointed Structures, Springer, Cham, pp.331-353, 2018, ⟨10.1007/978-3-319-56818-8_19⟩. ⟨hal-01589824⟩