Suppose that the fatigue data for the brass alloy in Problem 8.22 were taken from bending–rotating tests and that a rod of this alloy is to be used for an automobile axle that rotates at an average rotational velocity of 1800 revolutions per minute. Give the maximum bending stress amplitude possible for each of the following lifetimes of the rod:
(a) 1 year
(b) 1 month
(c) 1 day
(d) 1 hour
Problem 8.22
The fatigue data for a brass alloy are given as follows:
Stress Amplitude (MPa) | Cycles to Failure |
170 | 3.7 × 104 |
148 | 1.0 × 105 |
130 | 3.0 × 105 |
114 | 1.0 × 106 |
92 | 1.0 × 107 |
80 | 1.0 × 108 |
74 | 1.0 × 109 |
(a) Make an S–N plot (stress amplitude versus logarithm of cycles to failure) using these data.
(b) Determine the fatigue strength at 4 × 106 cycles.
(c) Determine the fatigue life for 120 MPa.
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.