Investigation of Fatigue Crack Growth under Pure Mode-I and Mixed Mode

Abstract

It is very difficult to find out the exact failure and fracture mechanism in complex devices. An attempt is made to predict the fatigue crack growth using finite element analysis to design a body against fatigue failure. In the present study, Pure Mode-I and Mixed Mode fatigue crack are analyzed and experimented by using simple fixture which assembles the specimen to machine. Fatigue crack growth test in Mixed Mode carried out for several load ratio on IS 2062 Grade A (E-250) with 5 mm thickness. The tests were performed in standard Servo-hydraulic Machine. The fatigue crack path obtained by ABAQUS software was compared with experimental data. Based on experimental and simulation work, it is found that as inclination angle of crack increases, it requires more load for initiation of the crack so it will increases the fatigue life.