Common name widely used
for substances, structures, materials or systems which are designed to have a
specific response to an external stimulus and be reversible upon removal of
stimulus is smart materials. Basically smart materials are designed materials
with more than 1 property which can be changed in a specific manner to an
external stimuli and revert back to their original state upon stimuli removal.
The first recorded
observation on smart
material was seen in 1932 on gold-cadmium. In 1938, the
second smart material transformation was observed on brass. In 1962, shape
memory effect in Nickel-Titanium was transformed. Following these, several
alloys and shape memory effects came into research and smart materials arouse in
field of materials science.
Smart Materials have
several names like intelligent materials, responsive materials etc. and they
are of several types depending on their response like Piezoelectric materials, Photomechanical
materials, Self-healing materials, Magnetocaloric materials, Thermoelectric
materials, Chemoresponsive materials, Electroactive polymers, shape memory
alloys and shape memory polymers. Polymorphs, ferrofluids, dielectric
elastomers, optical fibers, graphene,
carbon nanotubes and quantum tunneling composites are some of the modern
examples of smart materials.
All over the globe, smart
materials research has widened and intensified as they seem
to find their applications in several sectors like aerospace,
automobile, healthcare, construction, electronics, Mechatronics and so on.
Taking for example, NASA’s Glen research center has been investigating
development of shape memory alloys (SMA’s) for application as adaptive
structures and actuators. SMA’s are alloys which can deform at low temperature,
have memory and recover to their original shape upon heating. SMA’s have been
ideal for high force, large stroke and modest frequency response operations.
Recently a SMA has been developed to replace a traditional gearbox/motor
actuation system. Several other applications where SMA’s can be applied are
Adaptive structures, actuators, heat detection devices, medical devices,
High-temperature automotive, aeronautics and military.
Smart Materials have
come into picture, are being researched and hold scope to a large extent in our
future. What’s your take on future
and advancements of smart material applications? Let us know by writing to us
at smartmaterials@memeetings.com
Best Regards
Samantha
Samantha