​
Homework 2 Smart materials
Unit 5 Composite, smart & modern materials
​
Name:
1.
​
​Class:
​Mark:
​
​Define the term smart material.
​[2]
A material that
changes
in
2.
​
its
properties
response to external stimuli
​Give two environmental factors which could stimulate a smart material
Temperature
Light intensity
3.
4.
​Which one of the following is a suitable for use in feeding spoons for babies?
​[1]
⬨
​Electroluminescent wire
⬨
​Photochromic pigment
⬨
​Piezo electric material
⬨✓ ​Thermochromic pigment
​This question is about phosphorescent pigment.
(a)
​Describe how phosphorescent pigment
works.
​[2]
They
and
absorb
emit
energy
this
causing
from light
energy
"
them to
sources
when it is dark ,
'
in the dark
glow
(b)
​Name two suitable applications for
phosphorescent pigment.
​[2]
Aeroplane emergency light strips for aisles
Fire exit
signs
.
​[2]
5.
​
Shape Memory Alloys (SMA) can be deformed and will return to a pre-set shape in
certain conditions.
(a)
​Name a SMA
​[1]
Nitinol
(b)
​Explain two ways in which SMA’s are suitable
for use in high
performance eyewear.
​[4]
custom
To set the profile of the
eyewear
to the client ,
so
the
product
remains
good and secure fit
frames , to fold
For durables flexible
as
it
on
6.
resets to
sustain
a
comfortable
.
damage
which
can
up
compactly
be reverted
.
​Evaluate the ways in which smart materials can be used to increase safety in
everyday life.
[​ 6]
​
clearly identity fire exit and emergency signs
Provide
visual
are
SMA
s
too
hot
in
tire
representation
safe
to be
alarms
,
items that
especially
for babies
.
Provide illumination when there
Visual
of
is
indication of when something
no
is
electricity
wet
.
.
.