Fatigue behavior prediction of welded joints by using an integrated fracture mechanics approach

摘要: Abstract Current fracture mechanics methods for fatigue assessment of welded joints are based on long crack behavior. The present work introduces a method to predict the strength by means an integrated approach (IFMA) that takes into account behavior short cracks. This methodology estimates propagation rate as function difference between applied driving force and material threshold propagation, length. Firstly, proposed mechanic is introduced compared with traditional approach, used mainly fitness purpose cracks or other crack-like defects. Then, several theoretical parametric applications show its ability influence different mechanical, geometrical microstructural parameters in definition resistance joints. plate thickness, initial length reinforcement angle butt-welded has been analysed results good agreement experimental trends. Finally, analyze butt non-load-carrying transverse fillet joints, estimated compared.