• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

But the proportions of these materials have changed. As you can see from Figure1, the 1994 Boeing 777 have increased the use of composites such as carbon fibres, graphite, epoxy resins etc. by 10 % in comparison to the 1969 Boeing 747.

Extracts from this document...


Aircrafts are complex machines that are designed to transport people or payloads for long distances at very high speeds. These complicated transports are manufactured from a variety of different materials based on their mechanical properties, density, strength and stiffness as they are the primary requirements for constructing an aircraft. The developments of aircraft have evolved dramatically since the Wright Flyer in 1903 which was the first manned powered flying machine. There are remarkable differences between the Wright Flyer which used wood, glue and canvas in comparison to the aluminium, steel, titanium, composites etc. used by the 1969 Boeing 747-400. The concepts of aircraft are similar, but the choices of materials used are the main physical alterations that could be observed. ...read more.


On the other hand, metals such as aluminium, has a higher density, less strength and stiffness. Another important selection parameter is the economical property of composite. Even though manufacturing composites could be reasonably expensive in comparison to metals, but for the long run, due to its low density, fuel could be diminished for each flight hence a much larger reduction in cost could be achieved. Thirdly the manufacturing property of composite is again expensive as well as difficult as they normally require tape or fabric form and then put in a mold under heat and pressure during production. Again metals such as aluminium can be easily manufactured with low cost which means the production is cheaper. But an advantage of composites during production is that they can be layered and have the fibres positioned at a different direction which could provide a different behaviour for the designated structure. ...read more.


But as composites are used for the core interior of aircraft structure, there will be no opportunity for it to come in contact with water. On the other hand, some metals oxidizes and they also go through wears and tears. For non mechanical property, composites again have an advantage as it is not magnetic, thermal or electrical. These are important as during flights, the amount of static caused from the frictions between the aircraft and air can produce static which is dangerous. Also the friction will produce heat which could alter certain operations if it reaches too high. For conclusion, the increase use of composites from metals such as aluminium is necessary as it provides a range of advantages such as reduction of weight, cost, as well as better mechanical properties. But metals are still the major materials used as it has a more suitable property for the exterior parts of the aircraft. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Resistant Materials section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Resistant Materials essays

  1. The task has been set to make a hole punch (used to punch holes ...

    - after receiving the results of this investigation I will evaluate my results. The hole punch will need to be held for up to about 30 seconds at a time - I shall be giving a variety of weights to the group to hold for 30 seconds at arms length


    - 90 103 GENERAL CONCEPTION FOR NYLON The family of Nylons consists of several different types. Nylon 6/6, Nylon 6, Nylon 6/10, Nylon 6/12, Nylon 11, Nylon 12, and Nylon 6-6/6 copolymer are the most common. Of these, Nylon 6/6 and Nylon 6 dominate the market.

  1. Investigation into the physical properties of glass.

    Crystal has a higher refractive index than soda lime glass. Some lead crystal glass types have a refractive index of 1.8, which is much higher than ordinary window glass. In my research I haven't managed to find the reason for lead glass having a large refractive index but I can

  2. Stretching Materials

    I should act in a sensible and safe manner, carefully working with the equipment and being aware of any dangers. Obtaining My Evidence The next stage was to carry out my experiment, following all previous planning precisely. By doing this, I obtained the following results.

  1. Low carbon steel compared to nylon

    I am now going to start looking at Nylon (polyamide); this is only used for the clamp bars on the circuit board clamp. Nylon (Polyamide), invented in 1928 by Wallace Carothers is considered to be the first engineering thermoplastic. Same as the low carbon steel I'm going to look at the properties of nylon.

  2. The Wonder of Flight

    Suddenly, he realised how lucky Mr Mellows was. How much money he would probably make from his design. Mr Ellison felt himself begin to shake. He found that thoughts he knew should never enter a sane mans mind beginning to emerge and swim around his brain, scaring him, as he

  1. am going do this by going to different shops and checking the prices of ...

    Lastly for the range I took the largest number minus it to the smallest number to find out the range. This table helps me to compare the shop prices with the average price. I felt that the median as a suitable average for the furniture.

  2. Communication of Safety In the Design Phase.

    The reverse of which is true for both the manufacturing and service sectors. The actual implications in the short term are that more cases will be refereed from magistrates courts to higher courts, where in addition to higher fines, prison sentences can be imposed.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work