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 = a (0).[1- (om/OTS)] where OTS 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?

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 = a (0).[1- (om/OTS)] where OTS 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?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Question

2. The Goodman diagram relates oa and Om for fatigue failure after a specific number
of cycles Nf, where da is the cyclic stress amplitude, and om the mean stress. For a
steel specimen it is found that oa = a (0).[1- (om/OTS)] where OTS is the metal's tensile
stress (375MPa), and a (0)~0.450TS is the 10' 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?

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