Assesment Essay Example

Assignment in CES2016 6

Assignment in CES2016

Name of School (University)

assesment

Figure 1: Yield strength –v- density

assesment 1

Figure 2: Material in level 2 notionally available

assesment 2

Figure 3 :Young modulus/ density –v- yield strength/density

assesment 3

Figure 4: A graph of log y against log x in young modulus against density selection chart

List materials

  1. Aluminum

  2. Cast iron

  1. Metal alloys

  1. Low carbon steel

  2. High carbon steel

  3. Mild steel

  4. Carbon steel

  5. Zinc aluminum

  6. Stainless steel

  1. Wooden materials

  2. Composites

  1. Wood and steel composite

  1. Aluminum

  2. Cast iron

  1. Metal alloys

  1. Mild steel

  1. Wooden materials

  2. Composites

  1. Wood and steel composite

There is an overlap between the two lists for most materials

  1. Composites

  1. Wood and steel composite

  1. Wooden materials

  1. Cast iron

  2. Aluminum

  1. Metal alloys

  1. Mild steel

Some materials are light in weight and they are also cheap in price. Such materials would be suitable for the project at hand.

Q 3.1 and 3.2

assesment 4

Figure 5: A selection chart for m3 against m4

When the graph of m3 against m4 is drawn, the best materials are obtained. Materials which are structurally strong and are light in weight are useful in the manufacturing of aeroplane. If heavy materials would be used, a lot of fuel would be consumed in propelling it in the air. A lot of fuel would be consumed during takeoff and landing. To avoid all this, light materials are required and because of pressure imbalance these materials should be very strong.

pp homopolymer +0% glass fibre

young modulus MPa

yield strength MPa

1030-2017

pp homopolymer +10% glass fibre

young modulus MPa

yield strength MPa

1400-1612

pp homopolymer +20% glass fibre

young modulus MPa

yield strength MPa

1567- 2456

pp homopolymer +30% glass fibre

young modulus MPa

yield strength MPa

7000- 8500

47.3-57.4

pp homopolymer +40% glass fibre

young modulus MPa

yield strength MPa

8655-1050

48.7-59.2

i.
assesment 5

assesment 6

0

0

0.081623

0.132217

0.191598

assesment 7

Figure 6: A graph % volume against yield strength (Mpa)

assesment 8

Figure 7: A graph of % volume against young modulus (Mpa)

When the fiber glass is added to polypropylene PP all mechanical properties are affected. When the glass fiber is added, yield strength of the polypropylene is improved. As the percentage content increases, both yield strength and young modulus are improved. The same happens with the melting point and boiling point.

Reference

ASHBY, M. F. (2010). Materials Selection in Mechanical Design. Burlington, Elsevier Science.