Published Paper Details:

Fatigue failure of welded structures are major cause of failure due to which there is a loss of material and life especially in the field of marine and aerospace structures. Such catastrophic behavior of welded structures usually occurs under cyclic loading, where the stresses are within working limits. In the present project a fem based approach has been followed to estimate the fatigue life of welded titanium Grade 5 alloy for various weld bed shapes (flat, concave and convex), under different loading conditions. An S-N based fatigue approach which predicts complete life, starting from crack initiation, propagation and final failure of the structure is implemented to obtain the fatigue life of the welded structure. The purpose of this thesis is to provide the designer with better understanding of different fatigue calculation methods used in the industry in the present day and aim at decreasing the probability of failure with a higher control of a fatigue failure site.