Search

5 Sep 2001: important and could be assessed by a tensile test to measure elastic deformation before failure. ... supported beam of the test material (un-notched, or notched underneath on the tensile edge) – by.

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

7 Sep 2001: Simple Questions. Why is it economic to recycle aluminium cans but less so for steel ones? ... Why will new reserves of minerals/oil which are not now economic to mine become economic in the future?

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.

5 Sep 2001: Devising simple material tests is an important aspect of appreciating which properties are important in a design, and the challenges in obtaining meaningful, relevant material data.

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!

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

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.