Dynamics with Friction: Modeling, Analysis and Experiment

Guran, Ardéshir; Pfeiffer, Friedrich; Popp, Karl

doi:10.1142/4720

Cited by 27 publications

(7 citation statements)

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“…A sigmoidal response is an identifying characteristic of stick-slip behavior in different physical systems [6][7]. Fitting of experimental data using Eq.…”

Section: F Time-resolved Kinetics Of Boojum Slippingmentioning

confidence: 99%

“…Solid friction behavior, specifically stick-slip motion [1][2][3][4][5][6][7][8], describes a wide range of physical phenomena encountered in daily life. It describes the squeaking of chalk on a chalkboard and the squealing of sand compressed underfoot on a beach [2], as well as low frequency rumblings of a fault shift during earthquakes [3].…”

Section: Introductionmentioning

confidence: 99%

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Stick-slip motion of surface point defects prompted by magnetically controlled colloidal-particle dynamics in nematic liquid crystals

2015

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We explore the dynamics of topological point defects on surfaces of magnetically responsive colloidal microspheres in a uniformly aligned nematic liquid crystal host. We show that pinning of the liquid crystal director to a particle surface with random nanostructured morphology results in unexpected translational dynamics of both particles and topological point defects on their surfaces when subjected to rotating magnetic fields. We characterize and quantify the "stick-slip" motion of defects as a function of field rotation rates as well as temperature, demonstrating the roles played by the competition of elastic forces, surface anchoring and magnetic torques on the sphere as well as random-surface-mediated pinning of the easy axis of the nematic director on colloidal microspheres. We analyze our findings through their comparison to similar dynamic processes in other branches of science.

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“…A sigmoidal response is an identifying characteristic of stick-slip behavior in different physical systems [6][7]. Fitting of experimental data using Eq.…”

Section: F Time-resolved Kinetics Of Boojum Slippingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Stick-slip motion of surface point defects prompted by magnetically controlled colloidal-particle dynamics in nematic liquid crystals

2015

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“…Определение и прогнозирование силы тяги машин осуществляются в соответствии с действующим законом трения гибких тел -уравне-нием трения гибких тел Эйлера по усилию натяжения гибкого тела на одном из контактов с приводным блоком (Guran, Pfeiffer, & Popp, 2001;Askari, Flores, Dabirrahmani, & Appleyard, 2014;Mao, Popov, Starcevic, & Popov, 2017).…”

Section: Introductionunclassified

Friction of flexible friction effect and general law on friction in operation of transport machines with flexible tie body

Lubenets¹

2017

Min. miner. depos,

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Purpose. The justification of the new equation of friction of flexible bodies, which confirm the concepts of friction of bodies during operation of transport machines with flexible tie body. Methods.A comparison of the known concepts of the friction of bodies, the influencing factors, and the solutions of the Euler problem of the sliding of a flexible body along a fixed block. Originality. For the first time it is established that the new equation of friction of flexible bodies: -includes the frictional force and the normal reaction between the bodies, which are linearly connected; -corresponds to the equilibrium conditions of the mechanical system; -coincides with the law of friction of bodies of Coulomb, which is common. Practical implications.New scientific knowledge widens the idea of the friction of bodies. They contribute to a deeper understanding of the physics of the process and the accuracy of conducting research, determine the development of technology and perfection of transport vehicles with a flexible body, increase their efficiency and operation safety.

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“…There are several mechanisms which can lead into NVH. Most discussed are stick and slip, sprag and slip effects [1], non-conservative follower force [2] and mode coupling [3].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Frictional Stick-Slick Effect in Disk Brake NVH

Úradníček

Kraus

Musil

et al. 2017

Strojnícky Casopis – Journal of Mechanical Engineering

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Abstract:Paper describes the mechanism of vibration of a minimal automotive disc brake model which can lead to unwanted effects known as brake Noise Vibrations and Harshness (NVH). Stick-slip frictional effects are mathematically described by simplification of physical assumptions. Self-excited vibrations due to stick-slip and also stability conditions are defined using a 1 degree of freedom mechanical system. Non-Coulomb nonlinear behavior of the friction force with negative slope is considered. Response is obtained by the numerical solution of ordinary differential equation.

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Dynamics with Friction: Modeling, Analysis and Experiment

Cited by 27 publications

References 0 publications

Stick-slip motion of surface point defects prompted by magnetically controlled colloidal-particle dynamics in nematic liquid crystals

Stick-slip motion of surface point defects prompted by magnetically controlled colloidal-particle dynamics in nematic liquid crystals

Friction of flexible friction effect and general law on friction in operation of transport machines with flexible tie body

Investigation of Frictional Stick-Slick Effect in Disk Brake NVH

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