An Al alloy airframe component experiences the numbers of cycles n listed in the table below,...

 

Transcribed Image Text:

An Al alloy airframe component experiences the numbers of cycles n listed in the table below, at stress amplitudes of 280 MPa, then 200 MPa, and then 130 MPa. The N, values (from the Al alloy's S-N curve) are also given in the table below. After how many further cycles at a stress amplitude of 220 MPa will the component fail? oa (MPa) 280 200 130 220 n 10 9x105 5x106 ? Nf 104 3x106 107 2x105 An Al alloy airframe component experiences the numbers of cycles n listed in the table below, at stress amplitudes of 280 MPa, then 200 MPa, and then 130 MPa. The N, values (from the Al alloy's S-N curve) are also given in the table below. After how many further cycles at a stress amplitude of 220 MPa will the component fail? oa (MPa) 280 200 130 220 n 10 9x105 5x106 ? Nf 104 3x106 107 2x105