A fatigue test was conducted on a specimen having an initial surface crack lengt

Question

A fatigue test was conducted on a specimen having an initial surface crack length of 12.6 mm and a value of 1.8 for Y. If values for the mean stress and stress amplitude are 60.1 MPa and 156 MPa, respectively, calculate

(a) the maximum stress (in MPa)

(b) the minimum stress (in MPa)

(c) the stress intensity factor range ?K (in MPa*m^0.5) at the crack tip.

(a)
MPa A fatigue test was conducted on a specimen having an initial surface crack length of 12.6 mm and a value of 1.8 for Y. If values for the mean stress and stress amplitude are 60.1 MPa and 156 MPa, respectively, calculate the maximum stress (in MPa) the minimum stress (in MPa) he stress intensity factor range ?K (in MPa*m^0.5) at the crack tip.

Explanation / Answer

max stress= 216.1 mpa
min stress= 95.9mpa

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