scholarly journals A simple generalization of Prandtl–Tomlinson model to study nanoscale rolling friction

2020 ◽  
Vol 127 (13) ◽  
pp. 135102 ◽  
Author(s):  
Avirup Sircar ◽  
Puneet Kumar Patra
Keyword(s):  
Rolling Friction ◽  
Tomlinson Model ◽  
Simple Generalization

Wear Kinetics of Steels with Diffusion Coatings in Rolling Friction

2020 ◽  
Vol 56 (1) ◽  
pp. 50-58
Author(s):  
P. V. Kaplun ◽  
V. A. Honchar ◽  
T. V. Donchenko
Keyword(s):  
Rolling Friction ◽  
Diffusion Coatings ◽  
Kinetics Of

The Brake Device Design for Children Two-Wheel Dynamic Scooter

2011 ◽  
Vol 421 ◽  
pp. 724-727
Author(s):  
Xue Feng Yi ◽  
Li Jun He
Keyword(s):  
Sliding Friction ◽  
Rolling Friction ◽  
Safety Performance ◽  
Device Design ◽  
Emergency Braking ◽  
Design For Children ◽  
Brake Device

Children scooter safety performance is not good enough in the market, the cause of the majority of injuries to children is difficult to control the speed or emergency braking. According to the phenomenon, this paper focuses on designing dynamic scooter brake device for 8-10 child, we conceive that the brake device is given the force of the rolling friction and the sliding friction, so it can play a dual brake effect. It will enhance the security and stability of children dynamic scooter.

Simulation of rolling friction in the working stands of wide-strip mills

2007 ◽  
Vol 2007 (2) ◽  
pp. 120-126 ◽  
Author(s):  
E. A. Garber ◽  
S. N. Samarin ◽  
A. I. Traino ◽  
V. V. Ermilov
Keyword(s):  
Rolling Friction ◽  
Wide Strip

scholarly journals Figures-of-Merit for Rolling-Friction-Based Triboelectric Nanogenerators

2016 ◽  
Vol 1 (1) ◽  
pp. 1600017 ◽  
Author(s):  
Tao Jiang ◽  
Wei Tang ◽  
Xiangyu Chen ◽  
Chang Bao Han ◽  
Long Lin ◽  
...  
Keyword(s):  
Rolling Friction ◽  
Figures Of Merit ◽  
Triboelectric Nanogenerators

On automorphisms of monotone transformation posemigroups

2021 ◽  
pp. 2250032
Author(s):  
Dilawar Juneed Mir ◽  
Aftab Hussain Shah ◽  
Shabir Ahmad Ahanger
Keyword(s):  
Partial Transformation ◽  
Monotone Transformation ◽  
Full Transformation ◽  
Simple Generalization

In this paper, we provide a simple generalization of results of Sullivan for [Formula: see text] the full transformation monotone pomonoid and for [Formula: see text] the partial transformation monotone pomonoid by showing that every automorphism of [Formula: see text] and [Formula: see text] is inner induced by the elements of [Formula: see text] the pogroup of all ordered bijections on [Formula: see text]. We also show that [Formula: see text] is isomorphic to [Formula: see text]. Finally, we apply these results to get some more results in this direction.

Threshold Stress Criterion in New Wheel/Rail Interaction for Limiting Rail Damage Under Heavy Axle Loads

1992 ◽  
Vol 114 (3) ◽  
pp. 284-288 ◽  
Author(s):  
S. Kumar ◽  
S. P. Singh
Keyword(s):  
Threshold Stress ◽  
Rolling Friction ◽  
Contact Stresses ◽  
Rolling Contact ◽  
Internal Damage ◽  
Stress Criterion ◽  
Plasticity Region ◽  
Proper Design ◽  
Axle Loads ◽  
Qualitative Discussion

This paper presents a qualitative discussion of the effects of increasing new (initial) wheel-rail contact stresses on the degree of damage to the rail due to heavy axle loads. The importance and need of heavy axle loads and its relationship to rail damage as a result of the increasing wheel-rail contact stresses is discussed. Various mechanisms of energy absorption/losses due to free rolling and modes of rail damage are presented. These modes include surface and internal damage due to wear, contact shear, plasticity, fatigue, shelling, crack formation, etc. The concept of threshold stress observed in free rolling friction much earlier by Drutowski is discussed and analyzed. It is believed by the authors that the threshold stress is s material property. This concept of threshold stress, based on sharply increased rates of wear in free rolling contact, is then presented and analyzed. Considerations of increased plasticity-region development, due to increasing contact stresses and their relationship to increased rates of wear seen in experiments, is utilized to determine an upper bound of contact stresses for new wheel and rail under heavy axle load conditions. It is indicated that new wheel-rail profiles, which will achieve contact stresses below the threshold stress, will enable the U.S. railroads to carry heavy axle loads without serious future damage to the rails. It is concluded that a satisfactory solution for maintaining rail integrity under heavy axle loads is possible with proper design accompanied with laboratory experimentation for the new steels as they may be used in the rails.

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