2. At first the ancient used stones in his life then
bones and made tools to help him to hunt
and save his life from animals
After discovering the fire human used
minerals and the human life became more
comfortable and he made arrow and spear
….etc
3. now the development of materials
become unbelievable there are
Smart Materials , composite materials… etc
New materials have unbelievable properties
Now we will learn about some new materials in
our life as it will help us to study structure
and its application......
4. This materials were named composite as it real
made from two or more materials with
significantly different physical or chemical
properties which remain separate and distinct at
the macroscopic or microscopic scale within the
finished structure.
Properties
In general it is not isotropic so it is dependant on
the direction of force
The relationship between forces/moments and
strains/curvatures can be described with Young's
Modulus, the shear Modulus and the Poisson's
ratio,
5.
6. Now Composite materials have gained
popularity (despite their generally high cost)
in high-performance products that need to
be lightweight, yet strong enough to take
harsh loading conditions such as
aerospace components (tails, wings,
fuselages, propellers)
boat and Ships
10. Piezoelectric materials have two unique
properties which are interrelated. When a
piezoelectric material is deformed, it gives off
a small but measurable electrical discharge.
Alternately, when an electrical current is
passed through a piezoelectric material it
experiences a significant increase in size (up
to a 4% change in volume)
So it can be used as a sensor
12. Electro-rheostatic (ER) and magneto-rheostatic (MR)
materials are fluids, which can experience a dramatic
change in their viscosity. These fluids can change
from a thick fluid (similar to motor oil) to nearly a
solid substance within the span of a millisecond when
exposed to a magnetic or electric field; the effect can
be completely reversed just as quickly when the field
is removed. MR fluids experience a viscosity change
when exposed to a magnetic field, while ER fluids
experience similar changes in an electric field. The
composition of each type of smart fluid varies widely.
The most common form of MR fluid consists of tiny
iron particles suspended in oil, while ER fluids can be
as simple as milk chocolate or cornstarch and oil.
13. it is not magic or Prestidigitation
Magnetorheological
Fluids
14.
15. Now we do not know what the tech will lead
us to where in the world of materials that
help us to design structures in our life
Lets imagine and let the future answer us
