Energy-based wear law for oblique impacts in dry environment

Thibaut Souilliart (1, 2) , Emmanuel Rigaud (1) , Alain Le Bot (1) , Christian Phalippou (3)

1 LTDS - Laboratoire de Tribologie et Dynamique des Systèmes
2 DM2S - Département de Modélisation des Systèmes et Structures
3 DYN - Laboratoire d'études de DYNamique

Wear generated by repetitive impacts between an Inconel tube sample and a stainless steel flat bar target is studied through experiments in dry environment. Incident energy and angle of impacts are controlled, normal and tangential loads during impact are measured as well as rebound energy and angle of impacts. Impacts characteristics are analyzed and the influence of the energy loss during impacts and the incidence angle on generated wear is analyzed. Wear volume is found to be proportional to the energy loss, for which a maximum is observed at an incidence angle close to 25° from horizontal. An impact wear energy coefficient is introduced and an impact wear law with a strong mechanical meaning is proposed. This energy-based law well predicts the observed experimental wear. Highlights Impact wear between an Inconel tube and a stainless steel bar is studied. Wear is observed to be proportional to the energy loss during impacts. The energy loss during impacts strongly depends on incidence angle. An energy-based impact wear law is proposed.

Mots clés: Impact wear; Dry friction; Energy model; Analytical wear model

Domaines: Mécanique des matériaux [physics.class-ph]

Thibaut Souilliart, Emmanuel Rigaud, Alain Le Bot, Christian Phalippou. Energy-based wear law for oblique impacts in dry environment. Tribology International, 2017, 105, pp.241-249. ⟨10.1016/j.triboint.2016.10.014⟩. ⟨hal-02068271⟩