Mechanical Behaviour and Strength of Fillet Weld Under Tension (Part 1)

Abstract

Progressive research program is undertaken to observe the mechanical behaviour in crusiform fillet welded joint under tension. Attension is forcussed, in particular, on the effect of geometry of fillet weld including its contour, size and penetration on plastic deformation and strength of welded joint. The present report explains experimentally the effect of contour of fillet weld. Model specimens, having profile of crusiform fillet welded joints, machined from a mild steel of 1.6 mm thick are used for the experiments. Strain distributions in fillet weld are measured by using the Moire method. The strain and stress distributions in fillet weld at several load levels are obtained for various fillet angle θf. Influence of the fillet angle θf and reinforcement of weld on the strength of fillet welded joint are determined.