A great many people think they are thinking when they are merely rearranging their prejudices 
			...
Download
1 / 15

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


  • 63 Views
  • Uploaded on

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.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'A great many people think they are thinking when they are merely rearranging their prejudices William James' - geona


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

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


Materials selection - some considerations merely rearranging their prejudices 
 –

Economics

Environmental

Political

Market

Aesthetics

Material properties


Materials selection - material cost merely rearranging their prejudices 
 –

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

(unit wt. basis)


when drawing SS to rod merely rearranging their prejudices 
 –

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


Materials selection - political merely rearranging their prejudices 
 –

Who writes the specs for contract bids?

Will they specify stainless steel rebar in roads & bridges?


vs …… merely rearranging their prejudices 
 –

Materials selection - market

Carrera GT vs ……

Kia


Materials selection - aesthetics merely rearranging their prejudices 
 –


Materials selection - properties merely rearranging their prejudices 
 –


Materials selection - properties merely rearranging their prejudices 
 –


Materials selection - properties merely rearranging their prejudices 
 –


500 MPa merely rearranging their prejudices 
 –

P=50

Materials selection - properties

log sf = log r + log P


500 MPa merely rearranging their prejudices 
 –

Materials selection - properties


Know these functional groups: merely rearranging their prejudices 
 –

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


Be able to recognize and differentiate between these polymer structures:

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


Assignment: structures:

Review today's classnotes

a. selection considerations

b. use of Ashby charts

Read pp. 144-151


ad