What are
Intelligent Materials? A Material or System that can
adapt to different environmental conditions. There is a coupling between a physical property and the
motion or response of the material.
Selection of Intelligent
Materials
Piezoelectric
Shape Memory Alloys
ER / MR Fluids
Most commonly used
Large stroke can be archieved
Typically employed in isolators or valves
Temperature Independent
Highly temperature dependent
MR fluids are more stable than ER Fluids
Available in fiber, ceramic and crystal
Relatively inexpensive ( in wire format)
Low voltage power needed for MR fluids
Good for dynamic conditions (> 1 Hz)
Good for DC conditions (< 1 HZ )
High yield stress
High Force can be achieved with a stack
Slow response (> 1 msec)
Designed and contained in a device
Fast Response (<1 msec)
Have been implemented in automotive applications
Vibration-X, Inc
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