Figure 16-29 shows the behavior of polypropylene, polyethylene, and acetal at two temperatures. We would like to
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Figure 16-29 shows the behavior of polypropylene, polyethylene, and acetal at two temperatures. We would like to produce a 12-in.-long rod of a polymer that will operate at 40°C for 6 months under a constant load of 500 lb. Design the material and size of the rod such that no more than 5% elongation will occur by creep.
Transcribed Image Text:
Stress (psi) 4000 3000 2000 1000 23°C Acetal 60°C Polypropylene 23°C 60°C Polyethylene -23°C 1 2 3 Strain (%) after 1000 h -60°C 4
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Related Book For
The Science And Engineering Of Materials
ISBN: 9781305076761
7th Edition
Authors: Donald R. Askeland, Wendelin J. Wright
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