A great many people think they are thinking when they are merely rearranging their prejudices 
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A great many people think they are thinking when they are merely rearranging their prejudices 
– William James PowerPoint PPT Presentation


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A great many people think they are thinking when they are merely rearranging their prejudices 
– William James . Materials selection - some considerations. Economics Environmental Political Market Aesthetics Material properties. Materials selection - material cost.

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A great many people think they are thinking when they are merely rearranging their prejudices 
– William James

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A great many people think they are thinking when they are merely rearranging their prejudices william james

A great many people think they are thinking when they are merely rearranging their prejudices 
– William James


A great many people think they are thinking when they are merely rearranging their prejudices william james

Materials selection - some considerations

Economics

Environmental

Political

Market

Aesthetics

Material properties


A great many people think they are thinking when they are merely rearranging their prejudices william james

Materials selection - material cost

Relative cost - compared to that of hot rolled ASTM A36 plate (0.29C-1Mn-0.28Si)

(unit wt. basis)


A great many people think they are thinking when they are merely rearranging their prejudices william james

when drawing SS to rod

need lubricant

Materials selection - environmental

Health hazards

Recycling

Metals particularly suited to recycling - can be easily sorted, remelted, & shaped

Ceramics usually not recycled - many polymers are

Composites difficult to recycle - difficult to separate fibers from matrix


A great many people think they are thinking when they are merely rearranging their prejudices william james

Materials selection - political

Who writes the specs for contract bids?

Will they specify stainless steel rebar in roads & bridges?


A great many people think they are thinking when they are merely rearranging their prejudices william james

vs ……

Materials selection - market

Carrera GT vs ……

Kia


A great many people think they are thinking when they are merely rearranging their prejudices william james

Materials selection - aesthetics


A great many people think they are thinking when they are merely rearranging their prejudices william james

Materials selection - properties


A great many people think they are thinking when they are merely rearranging their prejudices william james

Materials selection - properties


A great many people think they are thinking when they are merely rearranging their prejudices william james

Materials selection - properties


A great many people think they are thinking when they are merely rearranging their prejudices william james

500 MPa

P=50

Materials selection - properties

log sf = log r + log P


A great many people think they are thinking when they are merely rearranging their prejudices william james

500 MPa

Materials selection - properties


A great many people think they are thinking when they are merely rearranging their prejudices william james

Know these functional groups:

acid, alcohol, amine, amide, epoxide, carbonate, ester


A great many people think they are thinking when they are merely rearranging their prejudices william james

Be able to recognize and differentiate between these polymer structures:

polyethylene, polypropylene, nylon, Kevlar, PVC, silicone, polycarbonate, Bakelite


A great many people think they are thinking when they are merely rearranging their prejudices william james

Assignment:

Review today's classnotes

a. selection considerations

b. use of Ashby charts

Read pp. 144-151


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