Question

1. A nickel rod (a - 14 x 10-PC, E 50 GPa at 800 C) was machined such that it perfectly fits inside an alumina tube (α = 8 x 10 /C, E = 375 at 800 C). The assembly was then slowly heated. At 800 °C, the alumina tube cracked. (a) Describe the state of stress as the assembly is heated (b) Estimate the strength of the alumina tube.

Answer 1

ャ ted niceal nod enpands sthem 8