20975210
Description
Mind Map by E M, updated more than 1 year ago
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Created by Niamh Walsh
over 9 years ago
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Copied by E M
almost 5 years ago
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DT Modern and Smart
Materials Mind map (A)
- Modern
- Fibre optics
- transmit light as a
digital signal (in
pulses)
- more data can be sent because
each glass fibre in the cable can
carry data
- transmit light as a
digital signal (in
pulses)
- Liquid Crystal Displays (LCD)
- allow light to pass through when aligned
'naturally''; when a small voltage is
applied the path of the electron flow
changes, blocking light
- reflective or
backlit
- e.g. calculator displays,
TV screens
- allow light to pass through when aligned
'naturally''; when a small voltage is
applied the path of the electron flow
changes, blocking light
- Kevlar
- has 5x the
strength-to-weight ratio
of steel
- fibres are
woven
together flat
- used for
bulletproof
vests
- Nomex (a deriavtive) protects
against heat and is worn by
racing drivers
- has 5x the
strength-to-weight ratio
of steel
- Carbon fibre
- made up of carbon woven into a
cloth, impregnatted with resin to
hold them together
- very lightweight
- high strength
- often used in F1 racing
and sports equipment
- made up of carbon woven into a
cloth, impregnatted with resin to
hold them together
- Polymorph
- a low melt polymer
(60˚c) which can be
remoulded easily
- a low melt polymer
(60˚c) which can be
remoulded easily
- Man made boards
- Flexible MDF
- thin grooves cut into the
material, allowing it to bend
- usually the grooves cannot be seen
as they are inside
- only able to bend at 90˚
to the grooves
- thin grooves cut into the
material, allowing it to bend
- Flexi ply
- as with ordinary plywood,
there is an odd number of
layers - usually 3
- two outer layers are open
grained, and are much thicker
than the core
- expensive
- used for aesthetics
and on furnitiure
- as with ordinary plywood,
there is an odd number of
layers - usually 3
- Flexible MDF
- Fibre optics
- Smart
- Thermochromic
pigments
- Change colour in response to
heat
- Change colour in response to
heat
- Phosphorescent
pigments
- absorb light and then
release the light
energy over a period
of time
- e.g. emergency
warning signs,
24hr clock faces
- absorb light and then
release the light
energy over a period
of time
- Shape memory
alloys
- e.g. nitinol wire
- shrinks in length by 5%
when an electrical current
is passed through it
- shrinks in length by 5%
when an electrical current
is passed through it
- e.g. memoflex
glasses
- nickel/titanium alloy which will
return to its original shape at
room temperature after being
deformed. A 'superelastic' alloy
- nickel/titanium alloy which will
return to its original shape at
room temperature after being
deformed. A 'superelastic' alloy
- e.g. nitinol wire
- Piezoelectric devices
- Produce an
electrical signal
when compressed
- e.g. sensors on bridges -
will produce a signal
when the load is above a
certain amount
- Produce an
electrical signal
when compressed
- Quantum tunnelling
composites
- change from an insulator to a conductor
when a deliberate force is applied
- e.g. touch
sensitive
clothing
- e.g. touch
sensitive
clothing
- change from an insulator to a conductor
when a deliberate force is applied
- Thermochromic
pigments
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