Dynamic tangential contact of rough surfaces in stick-slip microdrives: Modeling and validation using the method of dimensionality Reduction

Nguyen, Hau Van; Teidelt, Elena; Popov, Valentin L.; Fatikow, Sergej

doi:10.1134/s1029959914040079

Cited by 4 publications

(2 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In [7], it was shown that the macroscopic behavior of a frictional contact is strongly influenced by the contact stiffness. Related studies of the dependence of friction on tangential oscillations [15], [16] and a study of frictional drives [17] came to the same conclusion. In a recent experimental study [18] the contact stiffness was also confirmed as one of the main parameters governing the response of a tribological contact to high frequency oscillations.…”

Section: Introductionsupporting

confidence: 57%

Reduction of friction by normal oscillations. II. In-plane system dynamics

et al. 2017

View full text Add to dashboard Cite

Abstract:The influence of out-of-plane oscillations on friction is a well-known phenomenon that has been studied extensively with various experimental methods, e.g., pin-on-disk tribometers. However, existing theoretical models have yet achieved only qualitative correspondence with experiment. Here we argue that this may be due to the system dynamics (mass and tangential stiffness) of the pin or other system components being neglected. This paper builds on the results of a previous study [19] by taking the stiffness and resulting dynamics of the system into account. The main governing parameters determining macroscopic friction, including a dimensionless oscillation amplitude, a dimensionless sliding velocity and the relation between three characteristic frequencies (that of externally excited oscillation and two natural oscillation frequencies associated with the contact stiffness and the system stiffness) are identified. In the limiting cases of a very soft system and a very stiff system, our results reproduce the results of previous studies. In between these two limiting cases there is also a resonant case, which is studied here for the first time. The resonant case is notable in that it lacks a critical sliding velocity, above which oscillations no longer reduce friction. Results obtained for the resonant case are qualitatively supported by experiments.

show abstract

Section: Introductionsupporting

confidence: 57%

Reduction of friction by normal oscillations. II. In-plane system dynamics

et al. 2017

View full text Add to dashboard Cite

show abstract

“…However, later investigations suggested another interpretation. Studies of friction in stick-slip microdrives [17], [18] have shown that the static and dynamic behavior of drives can be completely understood and precisely described without any fitting parameters just by assuming that the characteristic length responsible for the "pre-slip" during tangential (in-plane) loading of a contact is equivalent to partial slip in a tangential contact of bodies with curved surfaces. This contact-mechanical approach was substantiated in [19] by a theoretical study of the influence of inplane oscillations on the static force of friction.…”

Section: Introductionmentioning

confidence: 99%

Reduction of friction by normal oscillations. I. Influence of contact stiffness

Попов

Popov

Popov³

2017

Friction

Self Cite

View full text Add to dashboard Cite

Abstract:The present paper is devoted to a theoretical analysis of sliding friction under the influence of oscillations perpendicular to the sliding plane. In contrast to previous works we analyze the influence of the stiffness of the tribological contact in detail and also consider the case of large oscillation amplitudes at which the contact is lost during a part of the oscillation period, so that the sample starts to "jump". It is shown that the macroscopic coefficient of friction is a function of only two dimensionless parameters-a dimensionless sliding velocity and dimensionless oscillation amplitude. This function in turn depends on the shape of the contacting bodies. In the present paper, analysis is carried out for two shapes: a flat cylindrical punch and a parabolic shape. Here we consider "stiff systems", where the contact stiffness is small compared with the stiffness of the system. The role of the system stiffness will be studied in more detail in a separate paper.

show abstract

Contact Mechanics for Randomly Rough Surfaces: On the Validity of the Method of Reduction of Dimensionality

Persson

2015

Tribol Lett

View full text Add to dashboard Cite

Dynamic tangential contact of rough surfaces in stick-slip microdrives: Modeling and validation using the method of dimensionality Reduction

Cited by 4 publications

References 13 publications

Reduction of friction by normal oscillations. II. In-plane system dynamics

Reduction of friction by normal oscillations. II. In-plane system dynamics

Reduction of friction by normal oscillations. I. Influence of contact stiffness

Contact Mechanics for Randomly Rough Surfaces: On the Validity of the Method of Reduction of Dimensionality

Contact Info

Product

Resources

About