2. The Goodman diagram relates oa and om for fatigue failure after a specific numberof cycles Nf, where da is the cyclic stress amplitude, and om the mean stress. For asteel specimen it is found that oa oa (0). [1- (om/OTS)] where Ors is the metal's tensilestress (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, whatis the maximum peak stress if failure in < 107 cycles is to be avoided?Ans: 233 MPa

Fatigue strength under zero mean stress , Tensile strength, Number of cycles to failure, N = 107…

2. The Goodman diagram relates oa and om for fatigue failure after a specific num of cycles Nf, where da is the cyclic stress amplitude, and on the mean stress. Fo steel specimen it is found that oa oa (0).[1- (om/OTS)] where Ors is the metal's ten stress (375MPa), and oa (0)~0.450Ts is the 107 cycle fatigue limit at zero mean str Assuming the specimen is cycled repeatedly between 0 stress and a peak stress, w 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 num of cycles Nf, where da is the cyclic stress amplitude, and on the mean stress. Fo steel specimen it is found that oa oa (0).[1- (om/OTS)] where Ors is the metal's ten stress (375MPa), and oa (0)~0.450Ts is the 107 cycle fatigue limit at zero mean str Assuming the specimen is cycled repeatedly between 0 stress and a peak stress, w is the maximum peak stress if failure in < 107 cycles is to be avoided? Ans: 233 MPa

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter9: Time, Temperature, And Mechanical Properties

Section: Chapter Questions

Problem 9.3P

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