at question A=110 MPa B=-60 MPa M=145 N.m Q1. State whether each of the two statements included in your input values for Q1are true or false:A. Sufficiently high tensile stress is required for fatigue crack propagationB. Sufficiently high compressive stress is required for fatigue crack propagationC. Fatigue requires sufficient variation in stress magnitudeD. Fatigue requires no variation in stress magnitudeE. A sufficient number of cycles is required to cause fatigue failureF. A single cycle of loading below the ultimate tensile strength is sufficient forfatigue failureG. Endurance limit implies finite lifeH. Fatigue limit implies finite lifeI. Fatigue limit implies infinite lifeJ. Endurance limit implies infinite lifeAnswers: Please write your answers in the table on the cover sheet [Q1 (i), (ii)].Q2. A machine component experiences cyclic loading with a maximum stress of AMPa* and a minimum stress of B MPa (see individual data for values of A andB).(i)(ii)Calculate the mean stress Sm and the stress amplitude SaAn S-N curve for the material used in the component is described by thefollowing equation:S = 450NfNeglecting the influence of mean stress, calculate the number of cyclesto cause failure, N₁, given the stress amplitude calculated above (i.e.Q2(i)). You may assume that the S-N curve applies to the mean stresscalculated for the component's stress-cycle.-0.159

Name: at question A=110 MPa B=-60 MPa M=145 N.m Q1.
Uploaded: 2024-03-20T06:56:55.000Z
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Description: at question A=110 MPa B=-60 MPa M=145 N.m Q1. State whether each of the two statements included in your input values for Q1are true or false:A. Sufficiently high tensile stress is required for fatigue crack propagationB. Suffi