Dependence of the Coefficient of Friction on the Sliding Conditions in the High Velocity Range

Molinari, A.; Estrin, Yuri; Mercier, Sébastien

doi:10.1115/1.2833808

Cited by 77 publications

(101 citation statements)

References 11 publications

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“…According to the Bowden and Tabor's friction model [24], the friction force in SSZ can be characterized as τ A r 2 , with τ 2 the shear stress in SSZ and A r the real contact area. Due to the high normal stress [28], A r is approximately equal to A [29]. Thus, the motion equation can be written as…”

Section: Nonlinear Dynamic Modelmentioning

confidence: 99%

Modelling the tuned criticality in stick-slip friction during metal cutting

Wang

et al. 2015

Modelling Simul. Mater. Sci. Eng.

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Cutting is a ubiquitous process in nature and man-made systems. Here we demonstrate that, based on morphological patterns observed in experiments, the friction behaviour of metal cutting exhibits a criticality with cutting speed as a tuned parameter. The corresponding stick-slip events can be described by a power law distribution. A dynamic thermo-mechanical model is developed to investigate how such a tuned criticality occurs. It is shown that, in terms of the linear stability analysis, stick-slip friction is due to the thermo-mechanical instability and dynamical interaction between shear dissipation and nonlinear friction. Moreover, there is a secondary transition from a criticality state to a limit cycle that is dominated by the inertia effect, which is similar to the frequency lock phenomenon in a forced Duffing oscillator.

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Section: Nonlinear Dynamic Modelmentioning

confidence: 99%

Modelling the tuned criticality in stick-slip friction during metal cutting

Wang

et al. 2015

Modelling Simul. Mater. Sci. Eng.

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“…Flash heating, weakening process (1), is a mechanism that has been advanced to explain high speed frictional weakening in metals (Bowden and Thomas, 1954;Archard, 1958/59;Ettles, 1986;Lim and Ashby, 1987;Lim et al, 1989;Molinari et al, 1999). It is only relatively recently that it has been considered as a process active during earthquake slip (Rice, 1999(Rice, , 2006Beeler and Tullis, 2003;Beeler et al, 2008;Tullis and Goldsby, 2003a,b;Hirose and Shimamoto, 2005;Noda et al, 2006;Noda, 2008).…”

Section: Fault Zone Structure Friction and A Quandary In Seismologymentioning

confidence: 99%

Thermo- and hydro-mechanical processes along faults during rapid slip

Rice¹,

Dunham²,

Noda³

2009

Meso-Scale Shear Physics in Earthquake and Landslide Mechanics

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Field observations of maturely slipped faults show a generally broad zone of damage by cracking and granulation. Nevertheless, large shear deformation, and therefore heat generation, in individual earthquakes takes place with extreme localization to a zone <1-5 mm wide within a finely granulated fault core. Relevant fault weakening processes during large crustal events are therefore likely to be thermal. Further, given the porosity of the damage zones, it seems reasonable to assume groundwater presence. It is suggested that the two primary dynamic weakening mechanisms during seismic slip, both of which are expected to be active in at least the early phases of nearly all crustal events, are then as follows: (1) Flash heating at highly stressed frictional micro-contacts, and (2) Thermal pressurization of fault-zone pore fluid. Both have characteristics which promote extreme localization of shear. Macroscopic fault melting will occur only in cases for which those processes, or others which may sometimes become active at large enough slip (e.g., thermal decomposition, silica gelation), have not sufficiently reduced heat generation and thus limited temperature rise. Spontaneous dynamic rupture modeling, using procedures that embody mechanisms (1) and (2), shows how faults can be statically strong yet dynamically weak, and operate under low overall driving stress, in a manner that generates negligible heat and meets major seismic constraints on slip, stress drop, and self-healing rupture mode.

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“…In consequence, from the thermal viewpoint, a 2D model can describe the present problem. In order to determine the necessary element size at the interface, the thermally affected depth is calculated using the following relation [10]:…”

Section: Simulation Of the Experimental Interactionmentioning

confidence: 99%

Initiation of Adhesive Wear During Frictional Interaction at Very High Velocity for a Ti6Al4V Tribopair

Chassaing

Pougis

Philippon

et al. 2016

Proceedings of the 13th World Conference on Titanium

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Friction tests have been carried out for a Ti6Al4V tribopair by subjecting specimens to a normal pressure of 110 MPa at siding velocity close to 40 m/s to reproduce exceptional cases (bird ingestion or blade off) of contact between the blades root and the rotor slot in aircraft engines. Using friction coefficients experimentally measured, thermo-mechanical FE simulations have been performed. The first millimeters of sliding were investigated to clearly identify adhesive wear activation. Stress, temperature and plastic shear strain evolutions are used to evaluate a damage criterion. It was found that such extreme conditions lead to third body creation after only few millimeters of sliding.

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Dependence of the Coefficient of Friction on the Sliding Conditions in the High Velocity Range

Cited by 77 publications

References 11 publications

Modelling the tuned criticality in stick-slip friction during metal cutting

Modelling the tuned criticality in stick-slip friction during metal cutting

Thermo- and hydro-mechanical processes along faults during rapid slip

Initiation of Adhesive Wear During Frictional Interaction at Very High Velocity for a Ti6Al4V Tribopair

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