Projects Using CES EduPack - MAELabs UCSD

More documents

Recommendations

Info

Notes for instructors The procedure is the same as that for Project 1. Open the <strong>CES</strong> <strong>EduPack</strong> 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
Project 3. Novel guitar case (guitar plus amplifier) Background Guitars are delicate instruments. They need a case to protect them when moved, and if they are electric, they need an amplifier and speaker and they too have to be moved and protected. The mission is to simplify this protection problem by designing a case that will hold and protect both the guitar and the amplifier plus speaker, using the case itself as the speaker cabinet and amplifier case. Objective To select materials and process method to make a case for guitar and amplifier. Requirements • Must be tough – the rule of thumb here is that the fracture toughness should be greater than 15 in the usual units (MPa.m 1/2 ) • Must be moldable • Good durability in fresh and salt water • Must be light • Should not cost too much © Granta Design, March 2009 15
Page 1: Cambridge University M A T E R I A
Page 4 and 5: © Granta Design, March 2009 2
Page 6 and 7: 1.3 Find the record for the Borosil
Page 8 and 9: 2. SEARCHING Searching lets you pul
Page 10 and 11: 3. SELECTING materials and process
Page 12 and 13: Now we’ll do a TREE STAGE. A Tree
Page 14 and 15: Notes for instructors Open the CES
Page 18 and 19: The procedure is the same as that f
Page 20 and 21: Project 6. Materials for heat sinks
Page 22 and 23: Notes for Instructors: Project 8, C
Page 24 and 25: Project 9. Bicycle frames Backgroun
Page 26 and 27: • The dominant constraint for a s
Page 28 and 29: Notes for instructors: Project 10,
Page 38 and 39: Solution There are several ways to
Page 42 and 43: Solution Under the solar flux, a te
Page 44 and 45: Project 17. Design of a heat-shield
Page 46 and 47: Solution (1) The deflection constra
Page 48 and 49: (5) The temperature criterion is ea
Page 54: Young's modulus, E (GPa) 1000 100 1

Projects Using CES EduPack - MAELabs UCSD

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?