Abstract
Vibration damping is usually divided in five different
damping mechanisms. They include internal material
damping, interface damping (friction damping), radiation
damping, energy losses occurring as a result of
reflection at discontinuities of structures, and viscous
damping caused by viscoelastic material or by surrounding
fluid. Internal friction of metals is due to the internal
mismatch in the material microstructure. In most of the
cases mechanisms related to internal friction have
negligibly small effect on the total damping capacity of
the structure. Some metal alloys exhibit exceptionally
high inherent damping capacity. The mechanisms
influencing the damping properties of the high damping
metals (HIDAMETs) can be categorized to four types of
basic mechanisms: multiphase structure, ferromagnetism,
dislocation damping and the damping due to movable twin
boundaries.
This paper deals with the internal damping of homogeneous
materials due to the magnetomechanical damping of
ferromagnetic material and the energy losses occurring at
the interfaces of multilayer materials. The damping
properties of a normal structural steel, Fe-Cr based
HIDAMET and the combinations of these materials are
studied. Typical applications of these types of materials
may require strength, stiffness or wear resistance and
hostile operating conditions combined with good damping
properties. Traditional measuring methods are used for
the determination of the damping coefficients. The
measured damping values consists of internal material
damping, radiation damping, viscous damping caused by the
surrounding air and specimen mounting. The damping
properties of the multilayer materials based on HIDAMETs
are compared to the traditional damping treatments. Basic
equations given in the literature are verified using
experimental results of multilayer materials. The
stiffness of multilayer structures is also studied.
HIDAMETs offer an alternative for controlling the damping
properties especially in harsh environments when wide
temperature range is needed.
| Original language | English |
|---|---|
| Title of host publication | Proceedings |
| Subtitle of host publication | 12th International Congress on Sound and Vibration 2005 (ICSV 12) |
| Publisher | International Institute of Acoustics and Vibration (IIAV) |
| Pages | 4882-4889 |
| Volume | 6 |
| ISBN (Print) | 978-1-62748-149-6 |
| Publication status | Published - 2005 |
| MoE publication type | A4 Article in a conference publication |
| Event | 12th International Congress on Sound and Vibration 2005, ICSV 12 - Lisbon, Portugal Duration: 11 Jul 2005 → 14 Jul 2005 |
Conference
| Conference | 12th International Congress on Sound and Vibration 2005, ICSV 12 |
|---|---|
| Abbreviated title | ICSV 12 |
| Country/Territory | Portugal |
| City | Lisbon |
| Period | 11/07/05 → 14/07/05 |
Keywords
- vibration damping
- high damping metal
- magnetomechanical damping