Showing all of your work and algebra,generate an approximate expression for T as a function ofthe other variables. (b) Explain w
hy your solution is only anapproximation. In particular, do you expect the velocity profilein the gap to remain linear as the gap becomes larger andlarger (i.e., if the outer radius Rowere to increase, all elsestaying the same)?
1 answer:
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Answer:
Explanation:
Given conditions
1)The stress on the blade is 100 MPa
2)The yield strength of the blade is 175 MPa
3)The Young’s modulus for the blade is 50 GPa
4)The strain contributed by the primary creep regime (not including the initial elastic strain) was 0.25 % or 0.0025 strain, and this strain was realized in the first 4 hours.
5)The temperature of the blade is 800°C.
6)The formula for the creep rate in the steady-state regime is dε /dt = 1 x 10-5 σ4 exp (-2 eV/kT)
where: dε /dt is in cm/cm-hr σ is in MPa T is in Kelvink = 8.62 x 10-5 eV/K
Young Modulus, E = Stress, /Strain, ∈
initial Strain,
creep rate in the steady state
but Tinitial = 0
solving the above equation,
we get
Tfinal = 2459.82 hr
Answer:
note:
solution is attached due to error in mathematical equation. please find the attachment
