scholarly journals On the Occurrence Conditions of Stick-Slip Phenomena in a Hydraulic Driving System. 2nd Report. In Case of Maximum Static Friction Different from Kinetic Friction with out Slipping.

2000 ◽  
Vol 66 (648) ◽  
pp. 2607-2615
Author(s):  
Eisuke TAKANO ◽  
Masato SAEKI ◽  
Ryo KUMAKURA ◽  
Hiroyuki TAKEUTI
Keyword(s):  
Static Friction ◽  
Kinetic Friction ◽  
Stick Slip ◽  
Driving System

Stick-Slip Motion of Machine Tool Slideway

1974 ◽  
Vol 96 (2) ◽  
pp. 557-566 ◽  
Author(s):  
S. Kato ◽  
K. Yamaguchi ◽  
T. Matsubayashi
Keyword(s):  
Boundary Conditions ◽  
Machine Tool ◽  
Static Friction ◽  
Experimental Results ◽  
Kinetic Friction ◽  
Stick Slip ◽  
Frictional Coefficients ◽  
Stick Slip Motion ◽  
Slip Motion

Stick-slip motion of a moving element on an actual machine tool slideway is investigated experimentally under various sliding conditions, and the fundamental characteristics of the stick-slip motion are clarified. Based on these experimental results, the characteristics of static friction in the period of stick and kinetic friction in the period of slip are studied concretely so as to clarify the stick-slip process. It is shown experimentally that static and kinetic frictional coefficients can be expressed with simple formulas. Using these expressions, the boundary conditions for occurrence of stick-slip motion are examined, and the relation between properties of the stick-slip motion and frictional characteristics is explained quantitatively.

Static and Kinetic Friction of Smooth Glass Surfaces Rubbed With Silicone Oils

2005 ◽  
Author(s):  
L. Rapoport ◽  
V. Shmukler ◽  
A. Moshkovich ◽  
A. Verdyan
Keyword(s):  
Wall Slip ◽  
Static Friction ◽  
Kinetic Friction ◽  
Stick Slip ◽  
Silicone Oils ◽  
Long Time ◽  
Silicone Liquid ◽  
Loading And Unloading ◽  
Micro Systems ◽  
Glass Surfaces

The study of the effect of waiting time, loading and unloading on static and kinetic friction for real contact micro-systems was carried out. Three types of silicone fluid with the viscosity of 100, 450 and 5000 cSt at 25° C were used. Stop-start experiments allowed us to estimate the relaxation time after the static friction overshoot. For silicone liquid with viscosity of 100 cSt, relaxation of friction force (F) after the static friction overshoot occurred over one cycle of testing. Relaxation of F for fluids with the viscosity of 450 and 5000 cSt occurred during a long time and this effect was opposite for these silicone liquids. The analysis of loading-unloading cycles showed only a partial reversibility of F. The results were compared with static friction and stick-slip data obtained in other works, using SFA and FFM techniques. In order to explain the effect of viscosity and structure of the lubricant layers on stick-slip phenomenon, interior and wall slip of the lubricant film is discussed.

Friction

2019 ◽  
pp. 88-109
Author(s):  
C. Mathew Mate ◽  
Robert W. Carpick
Keyword(s):  
Static Friction ◽  
Kinetic Friction ◽  
Stick Slip ◽  
Sliding Surfaces ◽  
Proportionality Constant ◽  
Contact Points ◽  
Real Area Of Contact ◽  
Stick Slip Motion ◽  
Slip Motion ◽  
Slip Distance

This chapter introduces friction as it manifests itself in everyday life. The chapter begins with Amontons’ law (1699) that friction is proportional to the loading force between contacting surfaces (the proportionality constant is called the coefficient of friction). The two primary mechanisms for unlubricated friction are adhesive friction and plowing friction, with the predominant mechanism generally being adhesive friction. Adhesive friction is proportional to the real area of contact; for rough surfaces, this contact area is proportional to the loading force, providing a physical underpinning for Amontons’ law. Processes like the nanoscale flow of atoms and molecules around contact points results in the force needed to induce sliding (static friction) being higher than the force needed to maintain sliding (kinetic friction). Friction decreasing with increasing velocity leads stick-slip motion of the sliding surfaces, where the slip distance can be as short as the distance between atoms.

Static Friction Models for Vehicle Simulation Study

2006 ◽  
Author(s):  
Xubin Song ◽  
Daniel G. Smedley
Keyword(s):  
Simulation Study ◽  
Static Friction ◽  
Friction Modeling ◽  
Stick Slip ◽  
Vehicle Simulation ◽  
Engineering Software ◽  
Variable Step ◽  
History Of ◽  
Friction Models ◽  
Smooth Dynamics

The history of the challenge of friction modeling is briefly reviewed. Then this paper focuses on the modeling and simulation study of the friction related dynamics in the Simulink® environment, because Matlab®/Simulink® are popular engineering software tools for both industry and academia. Matlab® and Simulink® are the proprietary products of MathWorks, Inc. In this paper, the static friction models are studied through Simulink® by applying fixed and variable step sizes. The comparison shows that the static Karnopp model is not only numerically tractable but also can be inclusive of the fundamental friction characteristics of both stick slip and correct friction predictions. Finally this paper presents an improved Karnopp model for clutch modeling with the use of Simulink®, and the simulation shows that this model is computationally tractable with smooth dynamics.

Stick-Slip Compensation of Micro-Positioning Using Elastic-Plastic Static Friction Model

2008 ◽  
Vol 47-50 ◽  
pp. 246-249
Author(s):  
Min Gyu Jang ◽  
Chul Hee Lee ◽  
Seung Bok Choi
Keyword(s):  
Static Friction ◽  
Friction Model ◽  
Smart Structure ◽  
Asperity Contact ◽  
Stick Slip ◽  
Elastic Plastic ◽  
Highly Nonlinear ◽  
Bridge Type ◽  
Structural Parts ◽  
Rough Surface Contact

In this paper, a stick-slip compensation for the micro-positioning is presented using the statistical rough surface contact model. As for the micro-positioning structure, PZT (lead(Pb) zirconia(Zr) Titanate(Ti)) actuator is used to drive the load for precise positioning with its high resolution incorporating with the PID (Proportional Integral Derivative) control algorithm. Since the stick-slip characteristics for the micro structures are highly nonlinear and complicated, it is necessary to incorporate more detailed stick-slip model for the applications involving the high precision motion control. Thus, the elastic-plastic static friction model is used for the stick-slip compensation considering the elastic-plastic asperity contact in the rough surfaces statistically. Mathematical model of the system for the positioning apparatus was derived from the dynamic behaviors of structural parts. Since the conventional piezoelectric actuator generates the short stroke, a bridge-type flexural hinge mechanism is introduced to amplify the linear motion range. Using the proposed smart structure, simulations under the representative positioning motion were conducted to demonstrate the micro-positioning under the stick-slip friction.

Sign in / Sign up

Export Citation Format

Share Document