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Structure is life 1


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Structure is life 1

  1. 1. 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
  2. 2.  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......
  3. 3.  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,
  4. 4.  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
  5. 5. aerospace components (tails, wings, fuselages, propellers) boat and Ships
  6. 6. it is not magic or Prestidigitation
  7. 7.  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
  8. 8. Electricity strain Piezoelectric smart material for breathing rate sensor
  9. 9.  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.
  10. 10. it is not magic or Prestidigitation Magnetorheological Fluids
  11. 11.  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
  12. 12. Thanks for attention And see you later with Structure is life Salamo 3aleko