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A low cycle fatigue test campaign has been carried out on a set of steel specimen (E = 210000 MPa) by imposing different alternate strain

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A low cycle fatigue test campaign has been carried out on a set of steel specimen (E = 210000 MPa) by imposing different alternate strain levels. The results of the tests are summarized in table 1, in which Ncia the number of cycles that each specimen was able to withstand prior to failure. NI Da 0 45 0,0135 120 0,0125 310 0,00995 990 0,00823 2350 0,0072 7800 0,0048 20025 0,0035 82000 0,0025 Basing on the available data: Determine the coefficients of the Manson-Coffin equation Calculate the expected life of a component made of the same material assuming the following loading conditions: 0. = 0.0075, 0. = 300 MPa, 0. =0 MPa b. 0. = 0.008, 0. = 300 MPa Om = 50 MPa using Morrow approach 0. - 0.0035, 0. - 350 MPa Om - 200 MPa using PSWT equation

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