2. The Goodman diagram relates oa and om for fatigue failure after a specific number of cycles N₁, where da is the cyclic stress amplitude, and on the mean stress. For a steel specimen it is found that oa oa (0). [1- (om/OTS)] where Ors is the metal's tensile stress (375MPa), and a (0)~0.450Ts is the 107 cycle fatigue limit at zero mean stress. Assuming the specimen is cycled repeatedly between 0 stress and a peak stress, what is the maximum peak stress if failure in < 107 cycles is to be avoided? Ans: 233 MPa
2. The Goodman diagram relates oa and om for fatigue failure after a specific number of cycles N₁, where da is the cyclic stress amplitude, and on the mean stress. For a steel specimen it is found that oa oa (0). [1- (om/OTS)] where Ors is the metal's tensile stress (375MPa), and a (0)~0.450Ts is the 107 cycle fatigue limit at zero mean stress. Assuming the specimen is cycled repeatedly between 0 stress and a peak stress, what is the maximum peak stress if failure in < 107 cycles is to be avoided? Ans: 233 MPa
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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![2. The Goodman diagram relates oa and om for fatigue failure after a specific number
of cycles N₁, where da is the cyclic stress amplitude, and on the mean stress. For a
steel specimen it is found that a = a (0). [1- (om/OTS)] where GTS is the metal's tensile
stress (375MPa), and oa (0)~0.450TS is the 107 cycle fatigue limit at zero mean stress.
Assuming the specimen is cycled repeatedly between 0 stress and a peak stress, what
is the maximum peak stress if failure in < 107 cycles is to be avoided?
Ans: 233 MPa](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F84bf7e00-816f-4f6a-ad58-b183b14716de%2F53ba3e83-045c-4746-b707-bd5e8a8ed1fd%2Ft4xvbqa_processed.jpeg&w=3840&q=75)
Transcribed Image Text:2. The Goodman diagram relates oa and om for fatigue failure after a specific number
of cycles N₁, where da is the cyclic stress amplitude, and on the mean stress. For a
steel specimen it is found that a = a (0). [1- (om/OTS)] where GTS is the metal's tensile
stress (375MPa), and oa (0)~0.450TS is the 107 cycle fatigue limit at zero mean stress.
Assuming the specimen is cycled repeatedly between 0 stress and a peak stress, what
is the maximum peak stress if failure in < 107 cycles is to be avoided?
Ans: 233 MPa
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