The geometry of the weld determines its fatigue strength.
Examination of a welded joint under a microscope shows that there are always dis-
continuities, particularly in the transition between the parent metal and the weld. Defects
can be such as undercutting, overlaps, overrunning welds, micro-cracks, excessive con-
vexity etc. Together with these 'micro-geometric' potential stress concentrations, the
'macro-geometric' stress concentrations for example in the form of such features as
sudden changes in the cross sections, determine the fatigue strength of the welded joint.
With a little experience and some imagination, it is soon quite easy to see where fatigue
cracks might be likely to occur in welded joints
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Date: 2023-04-10 hits: 515 Return
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Spot welding( RIHUI Ceramic Welding Backing) 2023-04-10