1.

The Coffin-Manson relation is described as ________________where Δεp = the plastic strain amplitudeε’f = fatigue ductility coefficient2N = number of strain reversal to failurec = fatigue ductility exponent

A. Δεp/2=ε’f (2N)c
B. Δεp=ε’f (2N)c
C. Δεp/2=ε’f (N)c
D. Δεp=ε’f (N)c
Answer» B. Δεp=ε’f (2N)c


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