Projects Using CES EduPack - MAELabs UCSD

Notes for instructors
The procedure is the same as that for Project 1. Open the CES EduPack at
Level 2. Click on Select. Select from ‘Edu Level 2: Materials with durability
properties’. The Results window in the lower left of the screen displays all 98
materials since none have yet been eliminated. Under the Selection Stages
heading, click on the Limit button. The upper figure shows the first two
requirements – that for optical quality transparency and for good moldability –
entered in the Limit stage. The next two are Durability properties. They are
entered in the same way, checking “Excellent”, and “Good” or “Acceptable”.
When these limits have been entered, click Apply. Only three materials survive.
The Results window now looks like this:
Results: 3 of 98 pass
Borosilicate glass
Polymethyl methacrylate (Acrylic, PMMA)
Soda-lime glass
Now the Graph stage to explore hardness and price. As in Project 1, under the
Selection Stages heading, click on the Graph button. In the Graph Stage Wizard
on the Y-axis tab, find Hardness - Vickers in the Attribute list, and click on it to
put it on the Y-axis. Then switch to the X-axis tab, find Price in the Attribute list
and click on it to make it appear in the X-axis. When you click OK the graph
shown in the lower figure appears. We have labeled the three materials in the
Results box above by clicking on them, and have moved the axes a little to make
it more readable – if you want to do that double click on the axis label on the
graph (e.g. on Hardness) bringing up a wizard that lets you adjust the axes. The
part of the graph we want is the upper left corner, where the selection box is
shown. The cheapest and hardest material that meets all the constraints is sodalime
glass – it is used for car headlights. If a polymer is wanted, the cheapest one
is PMMA, acrylic – it is used for car tail lights.
© Granta Design, March 2009 14