Embed Size (px)
Citation preview
Quiet Steel ®
By Pedro Alan Lemus
Material Science
MEEN 3344
Overview Quiet Steel(TM), a patented multi-layer laminate from Material Sciences Corporation (MSC), replaces the standard steel in vehicle body structures while simultaneously providing a significant reduction in vehicle sound and vibration levels.
An engineered viscoelastic polymer core sandwiched between two cold-rolled layers of steel. The viscoelastic layer is a "tunable" formulation, allowing vehicle designers to attenuate specific frequencies depending on where in the vehicle they use Quiet Steel(TM).
Advantages
Reduce vehicle costsReduce mass Improve NVH performance Improve quality Reduce build variation Streamline assembly
Can be electrogalvanized for corrosion protection
100% can be easily recycled
Applications
•First debuted as a dashboard for the 2003 Cadillac.•Currently used at GM, Ford and DaimlerChrysler for a variety of brake, powertrain, and body structure applications.
The dramatic reductions in noise and vibration in sheet metal panels made from Quiet Steel® are due to the very high levels of damping inherent in the material. The effect of damping is to reduce the vibration amplitude of a system which is being excited at, or near its resonant frequency. Since it is the vibration of a panel that generates radiated noise, the reduction in vibration amplitude due to damping directly leads to reduced noise radiated from the panel.
A typical sheet metal panel has many resonances and the resulting vibration response has many “peaks” at these resonances. The effect of Quiet Steel on a typical steel panel is dramatic as can be seen above
http://www.quietsteel.com/quietsteel.htmlhttp://www.theautochannel.com/F/news/2003/04/21/159754.htmlhttp://seattlepi.nwsource.com/wheels/167161_tw102.htmlhttp://www.manufacturingtalk.com/news/mls/mls100.html
Sources
Inspired by the superb tutelage of Dr Larry Peel!
