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4 Sep 2001: Design a test to rank various materials in order of their wear resistance. ... Tip: use a very strong material to slide against your test materials.

4 Sep 2001: Devise a test to compare the impact resistance of different polymers like polystyrene foam, PMMA (also known as Perspex) and polyethylene.

4 Sep 2001: Design a test to see how long polymers can be held above their maximum service temperature.

25 Feb 2002: Material processing. Local resources. A process encyclopedia containing details on how processes work as well as useful selection information such as possible materials, shapes, economics etc.

21 Apr 2010: Underlying metallurgical principles of ferrous metallurgy including strength, toughness, use of phase diagram, cooling curves and Jominy hardness test.

20 Mar 2000: Useful design guidelines about possible materials and shapes. Useful guidelines about the economics to enable selection of cost-effective processes.

4 Sep 2001: Devise a test for comparing the tear resistance of different fabrics.

30 Jan 2002: Izod test. A specimen of standard size with a notch on one side is clamped in a vice. ... 2. (J/m. 2. ). Impact energy from Izod or Charpy tests is simple energy in Joules (J).

20 Jan 2000: Even so, it is possible to generate a range of economic batch sizes for which a process is normally cost-effective. ... finding trained operators. environmental considerations. will all affect the choice of the most economic process.

4 Sep 2001: 1,140. 616. Alloy Steel. 210. 7,800. 1,330. Collect samples of many different types of rubber bands and test the amount of elongation before failure.

28 Jan 2000: Economics. We've already ruled out machining on cost grounds. Can any of the other processes be ruled out because of cost? ... We're going to want to make millions of pins, so we need a process with an appropriate economic batch size.

25 Feb 2002: Processing information. A process encyclopedia containing details on how processes work as well as useful selection information such as possible materials, shapes, economics etc.

4 Sep 2001: It is not economic to use standard processes such as turning - so another approach is needed.

8 Sep 2001: Economics. Milling machines vary in price from £1,000 to £1,000,000. Milling is generally a very slow way to produce a component - but it can be economic for prototyping

8 Sep 2001: Economics. The machinery is expensive, and can cost well over £100,000 for HIPing. ... Because there is little competition, can be economic for small batches (1,000+) - although still not cheap!

30 Jan 2002: The compression test is similar but uses a stocky specimen to prevent bending.

8 Sep 2001: Economics. For making stock items, rolling has few competitors.For this reason, it is usually performed by the foundries before passing on to customers for further processing. ... For long shaped sections, rolling is the only viable option for larger

30 Jan 2002: The compression test is similar but uses a stocky specimen to prevent bending.

8 Sep 2001: However, the production rate is slow so it is only economic for one-off jobs, repair work and difficult access situations. ... Joining of sheet (e.g. car body panels) is usually more economic by other welding processes such as spot welding.

30 Jan 2002: The compression test is similar but uses a stocky specimen to prevent bending.