Details
| Original language | English |
|---|---|
| Pages (from-to) | 379-383 |
| Number of pages | 5 |
| Journal | Ultrasonics |
| Volume | 40 |
| Issue number | 1-8 |
| Publication status | Published - May 2002 |
| Externally published | Yes |
Abstract
In many ultrasonic applications frictional effects play an important role (e.g. ultrasonic machining, ultrasonic motors). For optimising the applications in terms of quality, efficiency and lifetime it is important to understand the frictional coupling of the vibrating and the non-vibrating part. This contribution is devoted to give an explanation for the reduction of friction forces which is often observed when ultrasonic vibrations are superimposed to macroscopic motions. Usually adopted coefficients of friction are used for modelling such conditions suggesting special frictional mechanisms for high frequency oscillations, whereas the present paper shows that Coulomb's friction law provides a very good description of the observed phenomena if the kinematics of the system is taken into account. Two systems are investigated. In the first system the ultrasonic and macroscopic movements are parallel and in the second they are perpendicular to each other but also within the plane of contact. Both systems were investigated analytically and experimentally using a specially designed test rig. The measurements confirmed the analytically derived equations and therefore the validity of Coulomb's friction law even for ultrasonic conditions.
Keywords
- Friction, Motor, Piezoelectric, Reduction, Ultrasonic
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Acoustics and Ultrasonics
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In: Ultrasonics, Vol. 40, No. 1-8, 05.2002, p. 379-383.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - The effect of friction reduction in presence of ultrasonic vibrations and its relevance to travelling wave ultrasonic motors
AU - Storck, H.
AU - Littmann, W.
AU - Wallaschek, J.
AU - Mracek, M.
N1 - Copyright: Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2002/5
Y1 - 2002/5
N2 - In many ultrasonic applications frictional effects play an important role (e.g. ultrasonic machining, ultrasonic motors). For optimising the applications in terms of quality, efficiency and lifetime it is important to understand the frictional coupling of the vibrating and the non-vibrating part. This contribution is devoted to give an explanation for the reduction of friction forces which is often observed when ultrasonic vibrations are superimposed to macroscopic motions. Usually adopted coefficients of friction are used for modelling such conditions suggesting special frictional mechanisms for high frequency oscillations, whereas the present paper shows that Coulomb's friction law provides a very good description of the observed phenomena if the kinematics of the system is taken into account. Two systems are investigated. In the first system the ultrasonic and macroscopic movements are parallel and in the second they are perpendicular to each other but also within the plane of contact. Both systems were investigated analytically and experimentally using a specially designed test rig. The measurements confirmed the analytically derived equations and therefore the validity of Coulomb's friction law even for ultrasonic conditions.
AB - In many ultrasonic applications frictional effects play an important role (e.g. ultrasonic machining, ultrasonic motors). For optimising the applications in terms of quality, efficiency and lifetime it is important to understand the frictional coupling of the vibrating and the non-vibrating part. This contribution is devoted to give an explanation for the reduction of friction forces which is often observed when ultrasonic vibrations are superimposed to macroscopic motions. Usually adopted coefficients of friction are used for modelling such conditions suggesting special frictional mechanisms for high frequency oscillations, whereas the present paper shows that Coulomb's friction law provides a very good description of the observed phenomena if the kinematics of the system is taken into account. Two systems are investigated. In the first system the ultrasonic and macroscopic movements are parallel and in the second they are perpendicular to each other but also within the plane of contact. Both systems were investigated analytically and experimentally using a specially designed test rig. The measurements confirmed the analytically derived equations and therefore the validity of Coulomb's friction law even for ultrasonic conditions.
KW - Friction
KW - Motor
KW - Piezoelectric
KW - Reduction
KW - Ultrasonic
UR - http://www.scopus.com/inward/record.url?scp=0036566268&partnerID=8YFLogxK
U2 - 10.1016/S0041-624X(02)00126-9
DO - 10.1016/S0041-624X(02)00126-9
M3 - Article
AN - SCOPUS:0036566268
VL - 40
SP - 379
EP - 383
JO - Ultrasonics
JF - Ultrasonics
SN - 0041-624X
IS - 1-8
ER -