Problem

The cable in Fig. 1 is 6 × 37 of plow steel wire. Its diameter is in. The load is 20,000...

The cable in Fig. 1 is 6 × 37 of plow steel wire. Its diameter is in. The load is 20,000 lb and the sheave has a 24-in. pitch diameter.

(a) Find the expected cable life on the basis of 300 bends per week.
(b) Find the Fs on the basis of direct stress in the cable.
(c) Find the resultant stress when the cable is passing around the sheave.
(d) Find the minimum pitch diameter of the sheave and drum if fatigue effects are to be avoided.

Figure 1

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Solutions For Problems in Chapter 12

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