Engineering Materials

ME 31 Hmwk 10 Solutions

[20 pts] 1. Glass, aluminum, and various plastic materials are used for containers. Make a list of the advantages and disadvantages of using each of these three material types; include such factors as cost, recyclability, and energy consumption for container production.

[10 pts] 2. Discuss why it is important to consider the entire life cycle, rather than just the first stage of a material or component life. [10 pts] 3. Discuss how materials engineering can play a role in "green design." 10 pts] 4. Suggest other consumer actions for minimal environmental impact than just recycling. [For example buying in bulk, bringing usable bags to the grocery store, etc.]

[20 pts]

[20 pts] 22.D1 Aluminum: +’s include good strength, good barrier to diffusion of carbonation, recyclable, cools rapidly and is receptive to direct printing of labels. –‘s include that it is opaque and somewhat expensive. Glass: +’s include excellent barrier to diffusion of carbonation, inexpensive, and recycable. –‘s include are easy to break and somewhat heavy. Polyester: +’s include good strength, optically transparent, inexpensive, lightweight, and recyclable. –‘s include that it is a poor barrier to diffusion of carbonation.