Details
| Original language | English |
|---|---|
| Title of host publication | Smart Structures and Materials 2001: Damping and Isolation |
| Pages | 302-311 |
| Number of pages | 10 |
| Volume | 4331 |
| Publication status | Published - 2 Jul 2001 |
| Externally published | Yes |
| Event | SPIE'S 8TH ANNUAL INTERNATIONAL SYMPOSIUM ON SMART STRUCTURES AND MATERIALS - Newport Beach, United States Duration: 4 Mar 2001 → 8 Mar 2001 Conference number: 8 |
Publication series
| Name | Proceedings of SPIE-The International Society for Optical Engineering |
|---|---|
| Publisher | SPIE |
| ISSN (Print) | 0277-786X |
Abstract
Piezoelectric materials are an important class of smart materials for the generation of mechanical ultrasonic vibrations. In industrial applications (for example ultrasonic cutting) the frictional contact of the vibrating tool with the workpiece is of special importance. A common observation at the contact zone is that frictional forces can be significantly reduced by superposition of ultrasonic vibrations. In this report we present a theoretical explanation for the reduction of friction. A basic system, consisting of a longitudinal ultrasonic vibrator sliding on a plane, is investigated. It is shown that a modification of Coulomb's friction law can be applied to this kind of vibrating friction contact. The macroscopically observed friction-force with ultrasonic vibration depends on the sliding velocity and the velocity of vibration: For sliding velocities higher than the vibration-amplitude the frictional force is not changed by vibration. But for small sliding velocities the friction-coefficient is significantly reduced and almost approaches zero for very slow sliding-velocity. The theoretical results were confirmed systematically by experimental investigations done on a specially designed test-rig. Energy considerations are used to calculate the ultrasonic energy which is required to achieve a prescribed reduction of the frictional forces. The model is also used for sensing the vibration-amplitude as well as the sliding-velocity without an additional sensor.
Keywords
- Experimental, Friction, Modeling, Piezoelectric, Ultrasonic
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
- Computer Science(all)
- Computer Science Applications
- Mathematics(all)
- Applied Mathematics
- Engineering(all)
- Electrical and Electronic Engineering
Cite this
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Smart Structures and Materials 2001: Damping and Isolation. Vol. 4331 2001. p. 302-311 (Proceedings of SPIE-The International Society for Optical Engineering).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Reduction of friction using piezoelectrically excited ultrasonic vibrations
AU - Littmann, W.
AU - Storck, H.
AU - Wallaschek, J.
N1 - Conference code: 8
PY - 2001/7/2
Y1 - 2001/7/2
N2 - Piezoelectric materials are an important class of smart materials for the generation of mechanical ultrasonic vibrations. In industrial applications (for example ultrasonic cutting) the frictional contact of the vibrating tool with the workpiece is of special importance. A common observation at the contact zone is that frictional forces can be significantly reduced by superposition of ultrasonic vibrations. In this report we present a theoretical explanation for the reduction of friction. A basic system, consisting of a longitudinal ultrasonic vibrator sliding on a plane, is investigated. It is shown that a modification of Coulomb's friction law can be applied to this kind of vibrating friction contact. The macroscopically observed friction-force with ultrasonic vibration depends on the sliding velocity and the velocity of vibration: For sliding velocities higher than the vibration-amplitude the frictional force is not changed by vibration. But for small sliding velocities the friction-coefficient is significantly reduced and almost approaches zero for very slow sliding-velocity. The theoretical results were confirmed systematically by experimental investigations done on a specially designed test-rig. Energy considerations are used to calculate the ultrasonic energy which is required to achieve a prescribed reduction of the frictional forces. The model is also used for sensing the vibration-amplitude as well as the sliding-velocity without an additional sensor.
AB - Piezoelectric materials are an important class of smart materials for the generation of mechanical ultrasonic vibrations. In industrial applications (for example ultrasonic cutting) the frictional contact of the vibrating tool with the workpiece is of special importance. A common observation at the contact zone is that frictional forces can be significantly reduced by superposition of ultrasonic vibrations. In this report we present a theoretical explanation for the reduction of friction. A basic system, consisting of a longitudinal ultrasonic vibrator sliding on a plane, is investigated. It is shown that a modification of Coulomb's friction law can be applied to this kind of vibrating friction contact. The macroscopically observed friction-force with ultrasonic vibration depends on the sliding velocity and the velocity of vibration: For sliding velocities higher than the vibration-amplitude the frictional force is not changed by vibration. But for small sliding velocities the friction-coefficient is significantly reduced and almost approaches zero for very slow sliding-velocity. The theoretical results were confirmed systematically by experimental investigations done on a specially designed test-rig. Energy considerations are used to calculate the ultrasonic energy which is required to achieve a prescribed reduction of the frictional forces. The model is also used for sensing the vibration-amplitude as well as the sliding-velocity without an additional sensor.
KW - Experimental
KW - Friction
KW - Modeling
KW - Piezoelectric
KW - Ultrasonic
UR - http://www.scopus.com/inward/record.url?scp=0034846002&partnerID=8YFLogxK
U2 - 10.1117/12.432714
DO - 10.1117/12.432714
M3 - Conference contribution
AN - SCOPUS:0034846002
VL - 4331
T3 - Proceedings of SPIE-The International Society for Optical Engineering
SP - 302
EP - 311
BT - Smart Structures and Materials 2001: Damping and Isolation
T2 - SPIE'S 8TH ANNUAL INTERNATIONAL SYMPOSIUM ON SMART STRUCTURES AND MATERIALS
Y2 - 4 March 2001 through 8 March 2001
ER -