Question
From the S-N curve for an alloy, it is known that at cyclic stress amplitudes of 200, 240 and 280 MPa the number of cycles to failure is3.5 x 106, 3 x 105 and 2 x 104 respectively. If the Al component experiences 1.5x106 cycles at 200 MPa, followed by 1.2 x 105 cycles at240 MPa, after how many more cycles at 280 MPa d
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