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problemset_2008-4_key - Problem Set 4 EMA 4714 Materials...

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Design Concepts design requirements regular paper cup styro?foam rigid inj. mold double wall paper cup with fold out handle cellular wall temp in hand + + + + + temp cup OD + - + S + env. impact D - + + S - indent F Problem Set 4 EMA 4714 - Materials Selection and Failure Analysis KEY Due Friday, February 11, 2008 - 8:30 am Dieter Exercise 5.12 In the search for more environmentally friendly design, paper cups have replaced Styrofoam cups in some fast-food restaurants. These cups are not as good insulators, and the paper cups often get too hot for the hand. A design team is in search of a better disposal coffee cup. The designs to be evaluated are: [a] the current paper cup [b] a standard Styrofoam cup [c]] a rigid injection-molded cup with a handle [d] a double-wall disposable plastic cup [e] a paper cup with a pull-out handle [f] a paper cup with a cellular wall. These design concepts are to be evaluated with the current paper cup as the datum. The engineering characteristics on which the cups are evaluated are: 1. Temperature in the hand 2. Temperature of the outside of the cup
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