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1. A high-density polyethylene, E = 131 ksi and a = 63 × 10-6/°F , block (1) is positioned in a fixture. The block is 2.9 in. by 2.9 in. by 30 in. long. At room temperature, a gapof 0.11 in. exists between the block and the rigid support at B. Assume L1 = 30 in and A = 0.11 in. Determine: (a) the normal stress o in block (1) caused by a temperature increase of 93°F. (b) the normal strain e in block (1) at the increased temperature.

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