Look again at Prob. 1617. (a) Show how the optimal diameter d is related to the outside diameter D. (b) What is the optimal inner

Look again at Prob. 16–17.

(a) Show how the optimal diameter d is related to the outside diameter D.

(b) What is the optimal inner diameter?

(c) What does the tabulation show about maxima?

(d) Common proportions for such plate clutches lie in the range 0.45 ≤ d/D ≤ 0.80. Is the result in part a useful?

Prob. 16–17, A hydraulically operated multidisk plate clutch has an effective disk outer diameter of 6.5 in and an inner diameter of 4 in. The coefficient of friction is 0.24, and the limiting pressure is 120 psi.

There are six planes of sliding present.

(a) Using the uniform wear model, estimate the axial force F and the torque T.

(b) Let the inner diameter of the friction pairs d be a variable. Complete the following table:

(c) What does the tableshow?

d, in 2 3 56 4 T, lbf in