Quenching chatter instability in turning process with a vibro-impact nonlinear energy sink

Etienne Gourc (1) , Sébastien Seguy (2) , Guilhem Michon (2) , Alain Berlioz (2) , Brian Mann (3)

1 Universidade Federal de Uberlândia - UFU
2 ICA - Institut Clément Ader
3 Department of Mechanical Engineering and Material Science

This paper investigates the passive control of chatter instability in turning processes using a vibro-impact nonlinear energy sink (NES). The workpiece is assumed to be rigid and the tool is flexible. A dynamical model including a nonlinear cutting law is presented and the stability lobes diagram are obtained. The behavior of the system with the vibro-impact NES is investigated using an asymptotic analysis. A control mechanism by successive beating is revealed, similarly to the strongly modulated response in the case of NES with cubic stiffness. It is shown that such a response regime may be beneficial for chatter mitigation. An original experimental procedure is proposed to verify the sizing of the vibro-impact NES. An experimental setup is developed with a vibro-impact NES embedded on the lathe tool and the results are analyzed and validated

Mots clés: Chatter; instability; nonlinear energy sink; turning

Domaines: Vibrations [physics.class-ph]; Génie mécanique [physics.class-ph]

Etienne Gourc, Sébastien Seguy, Guilhem Michon, Alain Berlioz, Brian Mann. Quenching chatter instability in turning process with a vibro-impact nonlinear energy sink. Journal of Sound and Vibration, 2015, 355, pp.392-406. ⟨10.1016/j.jsv.2015.06.025⟩. ⟨hal-01820053⟩